The BUG_ON() recently introduced in lpfc_sli_ringtxcmpl_put() is hit in
the lpfc_els_abort() > lpfc_sli_issue_abort_iotag() >
lpfc_sli_abort_iotag_issue() function path [similar names], due to
'piocb->vport == NULL':

	BUG_ON(!piocb || !piocb->vport);

This happens because lpfc_sli_abort_iotag_issue() doesn't set the
'abtsiocbp->vport' pointer -- but this is not the problem.

Previously, lpfc_sli_ringtxcmpl_put() accessed 'piocb->vport' only if
'piocb->iocb.ulpCommand' is neither CMD_ABORT_XRI_CN nor
CMD_CLOSE_XRI_CN, which are the only possible values for
lpfc_sli_abort_iotag_issue():

    lpfc_sli_ringtxcmpl_put():

        if ((unlikely(pring->ringno == LPFC_ELS_RING)) &&
           (piocb->iocb.ulpCommand != CMD_ABORT_XRI_CN) &&
           (piocb->iocb.ulpCommand != CMD_CLOSE_XRI_CN) &&
            (!(piocb->vport->load_flag & FC_UNLOADING)))

    lpfc_sli_abort_iotag_issue():

        if (phba->link_state >= LPFC_LINK_UP)
                iabt->ulpCommand = CMD_ABORT_XRI_CN;
        else
                iabt->ulpCommand = CMD_CLOSE_XRI_CN;

So, this function path would not have hit this possible NULL pointer
dereference before.

In order to fix this regression, move the second part of the BUG_ON()
check prior to the pointer dereference that it does check for.

For reference, this is the stack trace observed. The problem happened
because an unsolicited event was received - a PLOGI was received after
our PLOGI was issued but not yet complete, so the discovery state
machine goes on to sw-abort our PLOGI.

    kernel BUG at drivers/scsi/lpfc/lpfc_sli.c:1326!
    Oops: Exception in kernel mode, sig: 5 [#1]
    <...>
    NIP [...] lpfc_sli_ringtxcmpl_put+0x1c/0xf0 [lpfc]
    LR  [...] __lpfc_sli_issue_iocb_s4+0x188/0x200 [lpfc]
    Call Trace:
    [...] [...] __lpfc_sli_issue_iocb_s4+0xb0/0x200 [lpfc] (unreliable)
    [...] [...] lpfc_sli_issue_abort_iotag+0x2b4/0x350 [lpfc]
    [...] [...] lpfc_els_abort+0x1a8/0x4a0 [lpfc]
    [...] [...] lpfc_rcv_plogi+0x6d4/0x700 [lpfc]
    [...] [...] lpfc_rcv_plogi_plogi_issue+0xd8/0x1d0 [lpfc]
    [...] [...] lpfc_disc_state_machine+0xc0/0x2b0 [lpfc]
    [...] [...] lpfc_els_unsol_buffer+0xcc0/0x26c0 [lpfc]
    [...] [...] lpfc_els_unsol_event+0xa8/0x220 [lpfc]
    [...] [...] lpfc_complete_unsol_iocb+0xb8/0x138 [lpfc]
    [...] [...] lpfc_sli4_handle_received_buffer+0x6a0/0xec0 [lpfc]
    [...] [...] lpfc_sli_handle_slow_ring_event_s4+0x1c4/0x240 [lpfc]
    [...] [...] lpfc_sli_handle_slow_ring_event+0x24/0x40 [lpfc]
    [...] [...] lpfc_do_work+0xd88/0x1970 [lpfc]
    [...] [...] kthread+0x108/0x130
    [...] [...] ret_from_kernel_thread+0x5c/0xbc
    <...>

Cc: stable@vger.kernel.org # v4.8
Fixes: 22466da5 ("lpfc: Fix possible NULL pointer dereference")
Reported-by: Harsha Thyagaraja <hathyaga@in.ibm.com>
Signed-off-by: Mauricio Faria de Oliveira <mauricfo@linux.vnet.ibm.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

We accidentally allocate sizeof(u32) instead of sizeof(struct
be_cmd_get_session_resp).

Fixes: 50a4b824 ("scsi: be2iscsi: Fix to make boot discovery non-blocking")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed by: Jitendra Bhivare <jitendra.bhivare@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

While issuing any ATA passthrough command to firmware the driver will
block the device. But it will unblock the device only if the I/O
completes through the ISR path. If a controller reset occurs before
command completion the device will remain in blocked state.

Make sure we unblock the device following a controller reset if an ATA
passthrough command was queued.

[mkp: clarified patch description]

Cc: <stable@vger.kernel.org> # v4.4+
Fixes: ac6c2a93bd07 ("mpt3sas: Fix for SATA drive in blocked state, after diag reset")
Signed-off-by: Suganath Prabu S <suganath-prabu.subramani@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Older controllers use SCSI target id '0' for the first internal disk. As
the controllers are now placed on the same bus as the internal disks
this leads to a clash with the SCSI target id of controller.  This patch
checks the SCSI revision, and moves older controller to bus '3' to be
compatible with older releases and avoid this problem.

[mkp: fixed uninitialized variable]

Fixes: 09371d62 ("hpsa: Change SAS transport devices to bus 0.")
Cc: <stable@vger.kernel.org> # v4.5+
Signed-off-by: Hannes Reinecke <hare@suse.com>
Acked-by: Don Brace <don.brace@microsemi.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Commit 540eb1ee ("scsi: libfc: fix seconds_since_last_reset calculation")
removed the use of 'struct timespec' from fc_get_host_stats(). This broke the
output of 'fcoeadm -s' after kernel 4.8-rc1.
Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
Cc: <stable@vger.kernel.org> # v4.8+
Fixes: 540eb1ee ("scsi: libfc: fix seconds_since_last_reset calculation")
Acked-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Bart Van Assche <bart.vanassche@sandisk.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

The previous commit 1535aa75 ("qla2xxx: fix invalid DMA access after
command aborts in PCI device remove") introduced a regression during an
EEH recovery, since the change to the qla2x00_abort_all_cmds() function
calls qla2xxx_eh_abort(), which verifies the EEH recovery condition but
handles it heavy-handed. (commit a465537a "qla2xxx: Disable the
adapter and skip error recovery in case of register disconnect.")

This problem warrants a more general/optimistic solution right into
qla2xxx_eh_abort() (eg in case a real command abort arrives during EEH
recovery, or if it takes long enough to trigger command aborts); but
it's still worth to add a check to ensure the code added by the previous
commit is correct and contained within its owner function.

This commit just adds a 'if (!ha->flags.eeh_busy)' check around it.
(ahem; a trivial fix for this -rc series; sorry for this oversight.)

With it applied, both PCI device remove and EEH recovery works fine.

Fixes: 1535aa75 ("scsi: qla2xxx: fix invalid DMA access after command aborts in PCI device remove")
Signed-off-by: Mauricio Faria de Oliveira <mauricfo@linux.vnet.ibm.com>
Acked-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

This is a work around for a bug with LSI Fusion MPT SAS2 when perfoming
secure erase. Due to the very long time the operation takes, commands
issued during the erase will time out and will trigger execution of the
abort hook. Even though the abort hook is called for the specific
command which timed out, this leads to entire device halt
(scsi_state terminated) and premature termination of the secure erase.

Set device state to busy while ATA passthrough commands are in progress.

[mkp: hand applied to 4.9/scsi-fixes, tweaked patch description]
Signed-off-by: Andrey Grodzovsky <andrey2805@gmail.com>
Acked-by: Sreekanth Reddy <Sreekanth.Reddy@broadcom.com>
Cc: <linux-scsi@vger.kernel.org>
Cc: Sathya Prakash <sathya.prakash@broadcom.com>
Cc: Chaitra P B <chaitra.basappa@broadcom.com>
Cc: Suganath Prabu Subramani <suganath-prabu.subramani@broadcom.com>
Cc: Sreekanth Reddy <Sreekanth.Reddy@broadcom.com>
Cc: Hannes Reinecke <hare@suse.de>
Cc: <stable@vger.kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

This patch will fix regression caused by commit 1e793f6f ("scsi:
megaraid_sas: Fix data integrity failure for JBOD (passthrough)
devices").

The problem was that the MEGASAS_IS_LOGICAL macro did not have braces
and as a result the driver ended up exposing a lot of non-existing SCSI
devices (all SCSI commands to channels 1,2,3 were returned as
SUCCESS-DID_OK by driver).

[mkp: clarified patch description]

Fixes: 1e793f6fReported-by: Jens Axboe <axboe@kernel.dk>
CC: stable@vger.kernel.org
Signed-off-by: Kashyap Desai <kashyap.desai@broadcom.com>
Signed-off-by: Sumit Saxena <sumit.saxena@broadcom.com>
Tested-by: Sumit Saxena <sumit.saxena@broadcom.com>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Tested-by: Jens Axboe <axboe@fb.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

If a command is aborted in the kernel but not in the adapter, it might be
considered complete and its DMA memory released, but it is still alive in
the adapter, which will trigger an invalid DMA access upon its completion
(in the DMA operations to deliver the command response to the driver).

On powerpc platforms with IOMMU/EEH capabilities, the problem is observed
during PCI device removal with ongoing IO requests -- which might trigger
an EEH event very often, pointing to a 'TCE Request Page Access Error'.

In that path, which is qla2x00_remove_one(), the commands are aborted in
qla2x00_abort_all_cmds(), which does not perform an abort in the adapter
as is done in qla2xxx_eh_abort() for example.

So, this patch changes qla2x00_abort_all_cmds() to abort commands in the
adapter too, with a call to qla2xxx_eh_abort(), which already implements
all the logic to submit abort requests and handle responses.
Reported-by: Naresh Bannoth <nbannoth@in.ibm.com>
Signed-off-by: Mauricio Faria de Oliveira <mauricfo@linux.vnet.ibm.com>
Acked-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

When the driver is unloading, in qla2x00_remove_one(), there is a single
call/point in time to abort ongoing commands, qla2x00_abort_all_cmds(),
which is still several steps away from the call to scsi_remove_host().

If more commands continue to arrive and be processed during that
interval, when the driver is tearing down and releasing its structures,
it might potentially hit an oops due to invalid memory access:

    Unable to handle kernel paging request for data at address 0x00000138
    <...>
    NIP [d000000004700a40] qla2xxx_queuecommand+0x80/0x3f0 [qla2xxx]
    LR [d000000004700a10] qla2xxx_queuecommand+0x50/0x3f0 [qla2xxx]

So, fail commands in qla2xxx_queuecommand() if the UNLOADING bit is set.
Signed-off-by: Mauricio Faria de Oliveira <mauricfo@linux.vnet.ibm.com>
Acked-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Before calling task_release_itt() task data is memset to zero because of
which DDP context information is lost resulting in incorrect DDP
resource cleanup, to fix this call task_release_itt() before memset.
Signed-off-by: Varun Prakash <varun@chelsio.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

A system can get hung task timeouts if a qlogic board fails during
initialization (if the board breaks again or fails the init). The hang
involves the scsi scan.

In a nutshell, since commit beb9e315 ("qla2xxx: Prevent removal and
board_disable race"):

...it is possible to have freed ha (base_vha->hw) early by a call to
qla2x00_remove_one when pdev->enable_cnt equals zero:

       if (!atomic_read(&pdev->enable_cnt)) {
               scsi_host_put(base_vha->host);
               kfree(ha);
               pci_set_drvdata(pdev, NULL);
               return;

Almost always, the scsi_host_put above frees the vha structure
(attached to the end of the Scsi_Host we're putting) since it's the last
put, and life is good.  However, if we are entering this routine because
the adapter has broken sometime during initialization AND a scsi scan is
already in progress (and has done its own scsi_host_get), vha will not
be freed. What's worse, the scsi scan will access the freed ha structure
through qla2xxx_scan_finished:

        if (time > vha->hw->loop_reset_delay * HZ)
                return 1;

The scsi scan keeps checking to see if a scan is complete by calling
qla2xxx_scan_finished. There is a timeout value that limits the length
of time a scan can take (hw->loop_reset_delay, usually set to 5
seconds), but this definition is in the data structure (hw) that can get
freed early.

This can yield unpredictable results, the worst of which is that the
scsi scan can hang indefinitely. This happens when the freed structure
gets reused and loop_reset_delay gets overwritten with garbage, which
the scan obliviously uses as its timeout value.

The fix for this is simple: at the top of qla2xxx_scan_finished, check
for the UNLOADING bit in the vha structure (_vha is not freed at this
point).  If UNLOADING is set, we exit the scan for this adapter
immediately. After this last reference to the ha structure, we'll exit
the scan for this adapter, and continue on.

This problem is hard to hit, but I have run into it doing negative
testing many times now (with a test specifically designed to bring it
out), so I can verify that this fix works. My testing has been against a
RHEL7 driver variant, but the bug and patch are equally relevant to to
the upstream driver.

Fixes: beb9e315 ("qla2xxx: Prevent removal and board_disable race")
Cc: <stable@vger.kernel.org> # v3.18+
Signed-off-by: Bill Kuzeja <william.kuzeja@stratus.com>
Acked-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

The code at the end of alua_rtpg_work() is as follows:

	scsi_device_put(sdev);
	kref_put(&pg->kref, release_port_group);

In other words, alua_rtpg_queue() must hold an sdev reference and a pg
reference before queueing rtpg work. If no rtpg work is queued no
additional references should be held when alua_rtpg_queue() returns. If
no rtpg work is queued, ensure that alua_rtpg_queue() only gives up the
sdev reference if that reference was obtained by the same
alua_rtpg_queue() call.
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Reported-by: Tang Junhui <tang.junhui@zte.com.cn>
Cc: Hannes Reinecke <hare@suse.com>
Cc: Tang Junhui <tang.junhui@zte.com.cn>
Cc: <stable@vger.kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

The vmw_pvscsi driver reports most successful aborts as FAILED to the
scsi error handler.  This is do to a misunderstanding of how
completion_done() works and its interaction with a successful wait using
wait_for_completion_timeout().  The vmw_pvscsi driver is expecting
completion_done() to always return true if complete() has been called on
the completion structure.  But completion_done() returns true after
complete() has been called only if no function like
wait_for_completion_timeout() has seen the completion and cleared it as
part of successfully waiting for the completion.

Instead of using completion_done(), vmw_pvscsi should just use the
return value from wait_for_completion_timeout() to know if the wait
timed out or not.

[mkp: bumped driver version per request]
Signed-off-by: David Jeffery <djeffery@redhat.com>
Reviewed-by: Laurence Oberman <loberman@redhat.com>
Reviewed-by: Ewan D. Milne <emilne@redhat.com>
Acked-by: Jim Gill <jgill@vmware.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

While merging mpt3sas & mpt2sas code, we added the is_warpdrive check
condition on the wrong line

---------------------------------------------------------------------------
 scsih_target_alloc(struct scsi_target *starget)
                        sas_target_priv_data->handle = raid_device->handle;
                        sas_target_priv_data->sas_address = raid_device->wwid;
                        sas_target_priv_data->flags |= MPT_TARGET_FLAGS_VOLUME;
-                       raid_device->starget = starget;
+                       sas_target_priv_data->raid_device = raid_device;
+                       if (ioc->is_warpdrive)
+                               raid_device->starget = starget;
                }
                spin_unlock_irqrestore(&ioc->raid_device_lock, flags);
                return 0;
------------------------------------------------------------------------------

That check should be for the line sas_target_priv_data->raid_device =
raid_device;

Due to above hunk, we are not initializing raid_device's starget for
raid volumes, and so during raid disk deletion driver is not calling
scsi_remove_target() API as driver observes starget field of
raid_device's structure as NULL.
Signed-off-by: Sreekanth Reddy <Sreekanth.Reddy@broadcom.com>
Cc: <stable@vger.kernel.org> # v4.4+
Fixes: 7786ab6a ("mpt3sas: Ported WarpDrive product SSS6200 support")
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Reference count of pg leaks in alua_rtpg_work() since kref_put() is not
called to decrease the reference count of pg when the condition
pg->rtpg_sdev==NULL satisfied (actually it is easy to satisfy), it would
cause memory of pg leakage.
Signed-off-by: tang.junhui <tang.junhui@zte.com.cn>
Cc: <stable@vger.kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

The arcmsr driver failed to pass SYNCHRONIZE CACHE to controller
firmware. Depending on how drive caches are handled internally by
controller firmware this could potentially lead to data integrity
problems.

Ensure that cache flushes are passed to the controller.

[mkp: applied by hand and removed unused vars]

Cc: <stable@vger.kernel.org>
Signed-off-by: Ching Huang <ching2048@areca.com.tw>
Reported-by: Tomas Henzl <thenzl@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

map_storep was not being vfree()'d in the module_exit call.

Cc: <stable@vger.kernel.org>
Signed-off-by: Ewan D. Milne <emilne@redhat.com>
Reviewed-by: Laurence Oberman <loberman@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Commit 02b01e01 ("megaraid_sas: return sync cache call with
success") modified the driver to successfully complete SYNCHRONIZE_CACHE
commands without passing them to the controller. Disk drive caches are
only explicitly managed by controller firmware when operating in RAID
mode. So this commit effectively disabled writeback cache flushing for
any drives used in JBOD mode, leading to data integrity failures.

[mkp: clarified patch description]

Fixes: 02b01e01
CC: stable@vger.kernel.org
Signed-off-by: Kashyap Desai <kashyap.desai@broadcom.com>
Signed-off-by: Sumit Saxena <sumit.saxena@broadcom.com>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Ewan D. Milne <emilne@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

The g_NCR5380 has been converted to more regular probing, which
means its probe function can now be invoked after the __init section
is discarded, as pointed out by this kbuild warning:

WARNING: drivers/scsi/built-in.o(.text+0x3a105): Section mismatch in reference from the function generic_NCR5380_isa_match() to the function .init.text:probe_intr()
WARNING: drivers/scsi/built-in.o(.text+0x3a145): Section mismatch in reference from the function generic_NCR5380_isa_match() to the variable .init.data:probe_irq

To make sure this works correctly in all cases, let's remove
the __init and __initdata annotations.

Fixes: a8cfbcae ("scsi: g_NCR5380: Stop using scsi_module.c")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Finn Thain <fthain@telegraphics.com.au>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

[ 3843.132217] WARNING: CPU: 20 PID: 1227 at kernel/softirq.c:150 __local_bh_enable_ip+0x6b/0x90
[ 3843.142815] Modules linked in:
...
[ 3843.294328] CPU: 20 PID: 1227 Comm: kworker/20:1H Tainted: G            E   4.8.0-rc1+ #3
[ 3843.304944] Hardware name: Dell Inc. PowerEdge R720/0X6H47, BIOS 1.4.8 10/25/2012
[ 3843.314798] Workqueue: kblockd blk_timeout_work
[ 3843.321350]  0000000000000086 00000000a32f4533 ffff8802216d7bd8 ffffffff8135c3cf
[ 3843.331146]  0000000000000000 0000000000000000 ffff8802216d7c18 ffffffff8108d661
[ 3843.340918]  00000096216d7c50 0000000000000200 ffff8802d07cc828 ffff8801b3632550
[ 3843.350687] Call Trace:
[ 3843.354866]  [<ffffffff8135c3cf>] dump_stack+0x63/0x84
[ 3843.362061]  [<ffffffff8108d661>] __warn+0xd1/0xf0
[ 3843.368851]  [<ffffffff8108d79d>] warn_slowpath_null+0x1d/0x20
[ 3843.376791]  [<ffffffff810930eb>] __local_bh_enable_ip+0x6b/0x90
[ 3843.384903]  [<ffffffff816fe7be>] _raw_spin_unlock_bh+0x1e/0x20
[ 3843.392940]  [<ffffffffa085f710>] beiscsi_alloc_pdu+0x2f0/0x6e0 [be2iscsi]
[ 3843.402076]  [<ffffffffa06bc358>] __iscsi_conn_send_pdu+0xf8/0x370 [libiscsi]
[ 3843.411549]  [<ffffffffa06bc6fe>] iscsi_send_nopout+0xbe/0x110 [libiscsi]
[ 3843.420639]  [<ffffffffa06bd98b>] iscsi_eh_cmd_timed_out+0x29b/0x2b0 [libiscsi]
[ 3843.430339]  [<ffffffff814cd1de>] scsi_times_out+0x5e/0x250
[ 3843.438119]  [<ffffffff813374af>] blk_rq_timed_out+0x1f/0x60
[ 3843.446009]  [<ffffffff8133759d>] blk_timeout_work+0xad/0x150
[ 3843.454010]  [<ffffffff810a6642>] process_one_work+0x152/0x400
[ 3843.462114]  [<ffffffff810a6f35>] worker_thread+0x125/0x4b0
[ 3843.469961]  [<ffffffff810a6e10>] ? rescuer_thread+0x380/0x380
[ 3843.478116]  [<ffffffff810aca28>] kthread+0xd8/0xf0
[ 3843.485212]  [<ffffffff816fedff>] ret_from_fork+0x1f/0x40
[ 3843.492908]  [<ffffffff810ac950>] ? kthread_park+0x60/0x60
[ 3843.500715] ---[ end trace 57ec0a1d8f0dd3a0 ]---
[ 3852.328667] NMI watchdog: Watchdog detected hard LOCKUP on cpu 1Kernel panic - not syncing: Hard LOCKUP

blk_timeout_work takes queue_lock spin_lock with interrupts disabled
before invoking iscsi_eh_cmd_timed_out. This causes a WARN_ON_ONCE in
spin_unlock_bh for wrb_lock/io_sgl_lock/mgmt_sgl_lock.

CPU was kept busy in lot of bottom half work with interrupts disabled
thus causing hard lock up.
Signed-off-by: Jitendra Bhivare <jitendra.bhivare@broadcom.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Chris Leech <cleech@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

The code at free_task label in __iscsi_conn_send_pdu can get executed
from blk_timeout_work which takes queue_lock using spin_lock_irq.
back_lock taken with spin_unlock_bh will cause WARN_ON_ONCE.  The code
gets executed either with bottom half or IRQ disabled hence using
spin_lock/spin_unlock for back_lock is safe.
Signed-off-by: Jitendra Bhivare <jitendra.bhivare@broadcom.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Chris Leech <cleech@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Commit afc3f83c ("scsi: ipr: Add asynchronous error notification")
introduced the warn on shown below. To fix this, rather than attempting
to send the KOBJ_CHANGE uevent from interrupt context, which is what is
causing the WARN_ON, just wake the ipr worker thread which will send a
KOBJ_CHANGE uevent.

[  142.278120] WARNING: CPU: 15 PID: 0 at kernel/softirq.c:161 __local_bh_enable_ip+0x7c/0xd0
[  142.278124] Modules linked in: ip6t_rpfilter ip6t_REJECT nf_reject_ipv6 ipt_REJECT nf_reject_ipv4 xt_conntrack ebtable_nat ebtable_broute bridge stp llc ebtable_filter ebtables ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_security ip6table_raw ip6table_filter ip6_tables iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_mangle iptable_security iptable_raw iptable_filter ses enclosure scsi_transport_sas sg pseries_rng nfsd auth_rpcgss nfs_acl lockd grace sunrpc ip_tables xfs libcrc32c sr_mod sd_mod cdrom ipr libata ibmvscsi scsi_transport_srp ibmveth dm_mirror dm_region_hash dm_log dm_mod
[  142.278208] CPU: 15 PID: 0 Comm: swapper/15 Not tainted 4.8.0.ipr+ #21
[  142.278213] task: c00000010cf24480 task.stack: c00000010cfec000
[  142.278217] NIP: c0000000000c0c7c LR: c000000000881778 CTR: c0000000003c5bf0
[  142.278221] REGS: c00000010cfef080 TRAP: 0700   Not tainted  (4.8.0.ipr+)
[  142.278224] MSR: 8000000000029033 <SF,EE,ME,IR,DR,RI,LE>  CR: 28008022  XER: 2000000f
[  142.278236] CFAR: c0000000000c0c20 SOFTE: 0
GPR00: c000000000706c78 c00000010cfef300 c000000000f91d00 c000000000706c78
GPR04: 0000000000000200 c000000000f7bc80 0000000000000000 00000000024000c0
GPR08: 0000000000000000 0000000000000001 c000000000ee1d00 c000000000a9bdd0
GPR12: c0000000003c5bf0 c00000000eb22d00 c000000100ca3880 c00000020ed38400
GPR16: 0000000000000000 0000000000000000 c000000100940508 0000000000000000
GPR20: 0000000000000000 0000000000000000 0000000000000000 00000000024000c0
GPR24: c0000000004588e0 c00000010863bd00 c00000010863bd00 c0000000013773f8
GPR28: c000000000f7bc80 0000000000000000 ffffffffffffffff c000000000f7bcd8
[  142.278290] NIP [c0000000000c0c7c] __local_bh_enable_ip+0x7c/0xd0
[  142.278296] LR [c000000000881778] _raw_spin_unlock_bh+0x38/0x60
[  142.278299] Call Trace:
[  142.278303] [c00000010cfef300] [c000000000f7bc80] init_net+0x0/0x1900 (unreliable)
[  142.278310] [c00000010cfef320] [c000000000706c78] peernet2id+0x58/0x80
[  142.278316] [c00000010cfef370] [c00000000075caec] netlink_broadcast_filtered+0x30c/0x550
[  142.278323] [c00000010cfef430] [c000000000459078] kobject_uevent_env+0x588/0x780
[  142.278331] [c00000010cfef510] [d000000003163a6c] ipr_process_error+0x11c/0x240 [ipr]
[  142.278337] [c00000010cfef5c0] [d000000003152298] ipr_fail_all_ops+0x108/0x220 [ipr]
[  142.278343] [c00000010cfef670] [d0000000031643f8] ipr_reset_restore_cfg_space+0xa8/0x240 [ipr]
[  142.278350] [c00000010cfef6f0] [d000000003158a00] ipr_reset_ioa_job+0x80/0xe0 [ipr]
[  142.278356] [c00000010cfef720] [d000000003153f78] ipr_reset_timer_done+0xa8/0xe0 [ipr]
[  142.278363] [c00000010cfef770] [c000000000149c88] call_timer_fn+0x58/0x1c0
[  142.278368] [c00000010cfef800] [c000000000149f60] expire_timers+0x140/0x200
[  142.278373] [c00000010cfef870] [c00000000014a0e8] run_timer_softirq+0xc8/0x230
[  142.278379] [c00000010cfef900] [c0000000000c0844] __do_softirq+0x164/0x3c0
[  142.278384] [c00000010cfef9f0] [c0000000000c0f18] irq_exit+0x1a8/0x1c0
[  142.278389] [c00000010cfefa20] [c000000000020b54] timer_interrupt+0xa4/0xe0
[  142.278394] [c00000010cfefa50] [c000000000002414] decrementer_common+0x114/0x180
Signed-off-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

We accidentally overwrite the original saved value of "flags" so that we
can't re-enable IRQs at the end of the function.  Presumably this
function is mostly called with IRQs disabled or it would be obvious in
testing.

Fixes: aceeffbb ("zfcp: trace full payload of all SAN records (req,resp,iels)")
Cc: <stable@vger.kernel.org> #2.6.38+
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Steffen Maier <maier@linux.vnet.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

The local variable of 'devname' in scsi_report_lun_scan() isn't used any
more, so remove it.

Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

This patch fixes one use-after-free report[1] by KASAN.

In __scsi_scan_target(), when a type 31 device is probed,
SCSI_SCAN_TARGET_PRESENT is returned and the target will be scanned
again.

Inside the following scsi_report_lun_scan(), one new scsi_device
instance is allocated, and scsi_probe_and_add_lun() is called again to
probe the target and still see type 31 device, finally
__scsi_remove_device() is called to remove & free the device at the end
of scsi_probe_and_add_lun(), so cause use-after-free in
scsi_report_lun_scan().

And the following SCSI log can be observed:

	scsi 0:0:2:0: scsi scan: INQUIRY pass 1 length 36
	scsi 0:0:2:0: scsi scan: INQUIRY successful with code 0x0
	scsi 0:0:2:0: scsi scan: peripheral device type of 31, no device added
	scsi 0:0:2:0: scsi scan: Sending REPORT LUNS to (try 0)
	scsi 0:0:2:0: scsi scan: REPORT LUNS successful (try 0) result 0x0
	scsi 0:0:2:0: scsi scan: REPORT LUN scan
	scsi 0:0:2:0: scsi scan: INQUIRY pass 1 length 36
	scsi 0:0:2:0: scsi scan: INQUIRY successful with code 0x0
	scsi 0:0:2:0: scsi scan: peripheral device type of 31, no device added
	BUG: KASAN: use-after-free in __scsi_scan_target+0xbf8/0xe40 at addr ffff88007b44a104

This patch fixes the issue by moving the putting reference at
the end of scsi_report_lun_scan().

[1] KASAN report
==================================================================
[    3.274597] PM: Adding info for serio:serio1
[    3.275127] BUG: KASAN: use-after-free in __scsi_scan_target+0xd87/0xdf0 at addr ffff880254d8c304
[    3.275653] Read of size 4 by task kworker/u10:0/27
[    3.275903] CPU: 3 PID: 27 Comm: kworker/u10:0 Not tainted 4.8.0 #2121
[    3.276258] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS Ubuntu-1.8.2-1ubuntu1 04/01/2014
[    3.276797] Workqueue: events_unbound async_run_entry_fn
[    3.277083]  ffff880254d8c380 ffff880259a37870 ffffffff94bbc6c1 ffff880078402d80
[    3.277532]  ffff880254d8bb80 ffff880259a37898 ffffffff9459fec1 ffff880259a37930
[    3.277989]  ffff880254d8bb80 ffff880078402d80 ffff880259a37920 ffffffff945a0165
[    3.278436] Call Trace:
[    3.278528]  [<ffffffff94bbc6c1>] dump_stack+0x65/0x84
[    3.278797]  [<ffffffff9459fec1>] kasan_object_err+0x21/0x70
[    3.279063] device: 'psaux': device_add
[    3.279616]  [<ffffffff945a0165>] kasan_report_error+0x205/0x500
[    3.279651] PM: Adding info for No Bus:psaux
[    3.280202]  [<ffffffff944ecd22>] ? kfree_const+0x22/0x30
[    3.280486]  [<ffffffff94bc2dc9>] ? kobject_release+0x119/0x370
[    3.280805]  [<ffffffff945a0543>] __asan_report_load4_noabort+0x43/0x50
[    3.281170]  [<ffffffff9507e1f7>] ? __scsi_scan_target+0xd87/0xdf0
[    3.281506]  [<ffffffff9507e1f7>] __scsi_scan_target+0xd87/0xdf0
[    3.281848]  [<ffffffff9507d470>] ? scsi_add_device+0x30/0x30
[    3.282156]  [<ffffffff94f7f660>] ? pm_runtime_autosuspend_expiration+0x60/0x60
[    3.282570]  [<ffffffff956ddb07>] ? _raw_spin_lock+0x17/0x40
[    3.282880]  [<ffffffff9507e505>] scsi_scan_channel+0x105/0x160
[    3.283200]  [<ffffffff9507e8a2>] scsi_scan_host_selected+0x212/0x2f0
[    3.283563]  [<ffffffff9507eb3c>] do_scsi_scan_host+0x1bc/0x250
[    3.283882]  [<ffffffff9507efc1>] do_scan_async+0x41/0x450
[    3.284173]  [<ffffffff941c1fee>] async_run_entry_fn+0xfe/0x610
[    3.284492]  [<ffffffff941a8954>] ? pwq_dec_nr_in_flight+0x124/0x2a0
[    3.284876]  [<ffffffff941d1770>] ? preempt_count_add+0x130/0x160
[    3.285207]  [<ffffffff941a9a84>] process_one_work+0x544/0x12d0
[    3.285526]  [<ffffffff941aa8e9>] worker_thread+0xd9/0x12f0
[    3.285844]  [<ffffffff941aa810>] ? process_one_work+0x12d0/0x12d0
[    3.286182]  [<ffffffff941bb365>] kthread+0x1c5/0x260
[    3.286443]  [<ffffffff940855cd>] ? __switch_to+0x88d/0x1430
[    3.286745]  [<ffffffff941bb1a0>] ? kthread_worker_fn+0x5a0/0x5a0
[    3.287085]  [<ffffffff956dde9f>] ret_from_fork+0x1f/0x40
[    3.287368]  [<ffffffff941bb1a0>] ? kthread_worker_fn+0x5a0/0x5a0
[    3.287697] Object at ffff880254d8bb80, in cache kmalloc-2048 size: 2048
[    3.288064] Allocated:
[    3.288147] PID = 27
[    3.288218]  [<ffffffff940b27ab>] save_stack_trace+0x2b/0x50
[    3.288531]  [<ffffffff9459f246>] save_stack+0x46/0xd0
[    3.288806]  [<ffffffff9459f4bd>] kasan_kmalloc+0xad/0xe0
[    3.289098]  [<ffffffff9459c07e>] __kmalloc+0x13e/0x250
[    3.289378]  [<ffffffff95078e5a>] scsi_alloc_sdev+0xea/0xcf0
[    3.289701]  [<ffffffff9507de76>] __scsi_scan_target+0xa06/0xdf0
[    3.290034]  [<ffffffff9507e505>] scsi_scan_channel+0x105/0x160
[    3.290362]  [<ffffffff9507e8a2>] scsi_scan_host_selected+0x212/0x2f0
[    3.290724]  [<ffffffff9507eb3c>] do_scsi_scan_host+0x1bc/0x250
[    3.291055]  [<ffffffff9507efc1>] do_scan_async+0x41/0x450
[    3.291354]  [<ffffffff941c1fee>] async_run_entry_fn+0xfe/0x610
[    3.291695]  [<ffffffff941a9a84>] process_one_work+0x544/0x12d0
[    3.292022]  [<ffffffff941aa8e9>] worker_thread+0xd9/0x12f0
[    3.292325]  [<ffffffff941bb365>] kthread+0x1c5/0x260
[    3.292594]  [<ffffffff956dde9f>] ret_from_fork+0x1f/0x40
[    3.292886] Freed:
[    3.292945] PID = 27
[    3.293016]  [<ffffffff940b27ab>] save_stack_trace+0x2b/0x50
[    3.293327]  [<ffffffff9459f246>] save_stack+0x46/0xd0
[    3.293600]  [<ffffffff9459fa61>] kasan_slab_free+0x71/0xb0
[    3.293916]  [<ffffffff9459bac2>] kfree+0xa2/0x1f0
[    3.294168]  [<ffffffff9508158a>] scsi_device_dev_release_usercontext+0x50a/0x730
[    3.294598]  [<ffffffff941ace9a>] execute_in_process_context+0xda/0x130
[    3.294974]  [<ffffffff9508107c>] scsi_device_dev_release+0x1c/0x20
[    3.295322]  [<ffffffff94f566f6>] device_release+0x76/0x1e0
[    3.295626]  [<ffffffff94bc2db7>] kobject_release+0x107/0x370
[    3.295942]  [<ffffffff94bc29ce>] kobject_put+0x4e/0xa0
[    3.296222]  [<ffffffff94f56e17>] put_device+0x17/0x20
[    3.296497]  [<ffffffff9505201c>] scsi_device_put+0x7c/0xa0
[    3.296801]  [<ffffffff9507e1bc>] __scsi_scan_target+0xd4c/0xdf0
[    3.297132]  [<ffffffff9507e505>] scsi_scan_channel+0x105/0x160
[    3.297458]  [<ffffffff9507e8a2>] scsi_scan_host_selected+0x212/0x2f0
[    3.297829]  [<ffffffff9507eb3c>] do_scsi_scan_host+0x1bc/0x250
[    3.298156]  [<ffffffff9507efc1>] do_scan_async+0x41/0x450
[    3.298453]  [<ffffffff941c1fee>] async_run_entry_fn+0xfe/0x610
[    3.298777]  [<ffffffff941a9a84>] process_one_work+0x544/0x12d0
[    3.299105]  [<ffffffff941aa8e9>] worker_thread+0xd9/0x12f0
[    3.299408]  [<ffffffff941bb365>] kthread+0x1c5/0x260
[    3.299676]  [<ffffffff956dde9f>] ret_from_fork+0x1f/0x40
[    3.299967] Memory state around the buggy address:
[    3.300209]  ffff880254d8c200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[    3.300608]  ffff880254d8c280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[    3.300986] >ffff880254d8c300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[    3.301408]                    ^
[    3.301550]  ffff880254d8c380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[    3.301987]  ffff880254d8c400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[    3.302396]
==================================================================

Cc: Christoph Hellwig <hch@lst.de>
Cc: stable@vger.kernel.org
Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

At drivers/scsi/device_handler/scsi_dh_emc.c it was defined as:

Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Christophe Varoqui <christophe.varoqui@opensvc.com>
Cc: James E.J. Bottomley <jejb@linux.vnet.ibm.com>
Cc: Martin K. Petersen <martin.petersen@oracle.com>
Cc: SCSI ML <linux-scsi@vger.kernel.org>
Cc: device-mapper development <dm-devel@redhat.com>
Signed-off-by: Xose Vazquez Perez <xose.vazquez@gmail.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Pull btrfs updates from Chris Mason:
 "This is a big variety of fixes and cleanups.

  Liu Bo continues to fixup fuzzer related problems, and some of Josef's
  cleanups are prep for his bigger extent buffer changes (slated for
  v4.10)"

* 'for-linus-4.9' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs: (39 commits)
  Revert "btrfs: let btrfs_delete_unused_bgs() to clean relocated bgs"
  Btrfs: remove unnecessary btrfs_mark_buffer_dirty in split_leaf
  Btrfs: don't BUG() during drop snapshot
  btrfs: fix btrfs_no_printk stub helper
  Btrfs: memset to avoid stale content in btree leaf
  btrfs: parent_start initialization cleanup
  btrfs: Remove already completed TODO comment
  btrfs: Do not reassign count in btrfs_run_delayed_refs
  btrfs: fix a possible umount deadlock
  Btrfs: fix memory leak in do_walk_down
  btrfs: btrfs_debug should consume fs_info when DEBUG is not defined
  btrfs: convert send's verbose_printk to btrfs_debug
  btrfs: convert pr_* to btrfs_* where possible
  btrfs: convert printk(KERN_* to use pr_* calls
  btrfs: unsplit printed strings
  btrfs: clean the old superblocks before freeing the device
  Btrfs: kill BUG_ON in run_delayed_tree_ref
  Btrfs: don't leak reloc root nodes on error
  btrfs: squash lines for simple wrapper functions
  Btrfs: improve check_node to avoid reading corrupted nodes
  ...

Pull UBI/UBIFS updates from Richard Weinberger:
 "This pull request contains:

   - Fixes for both UBI and UBIFS
   - overlayfs support (O_TMPFILE, RENAME_WHITEOUT/EXCHANGE)
   - Code refactoring for the upcoming MLC support"

[ Ugh, we just got rid of the "rename2()" naming for the extended rename
  functionality. And this re-introduces it in ubifs with the cross-
  renaming and whiteout support.

  But rather than do any re-organizations in the merge itself, the
  naming can be cleaned up later ]

* tag 'upstream-4.9-rc1' of git://git.infradead.org/linux-ubifs: (27 commits)
  UBIFS: improve function-level documentation
  ubifs: fix host xattr_len when changing xattr
  ubifs: Use move variable in ubifs_rename()
  ubifs: Implement RENAME_EXCHANGE
  ubifs: Implement RENAME_WHITEOUT
  ubifs: Implement O_TMPFILE
  ubi: Fix Fastmap's update_vol()
  ubi: Fix races around ubi_refill_pools()
  ubi: Deal with interrupted erasures in WL
  UBI: introduce the VID buffer concept
  UBI: hide EBA internals
  UBI: provide an helper to query LEB information
  UBI: provide an helper to check whether a LEB is mapped or not
  UBI: add an helper to check lnum validity
  UBI: simplify LEB write and atomic LEB change code
  UBI: simplify recover_peb() code
  UBI: move the global ech and vidh variables into struct ubi_attach_info
  UBI: provide helpers to allocate and free aeb elements
  UBI: fastmap: use ubi_io_{read, write}_data() instead of ubi_io_{read, write}()
  UBI: fastmap: use ubi_rb_for_each_entry() in unmap_peb()
  ...

it actually worked only when requested area ended on the page boundary...
Reported-by: Marco Grassi <marco.gra@gmail.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Pull networking fixes from David Miller:

 1) Netfilter list handling fix, from Linus.

 2) RXRPC/AFS bug fixes from David Howells (oops on call to serviceless
    endpoints, build warnings, missing notifications, etc.) From David
    Howells.

 3) Kernel log message missing newlines, from Colin Ian King.

 4) Don't enter direct reclaim in netlink dumps, the idea is to use a
    high order allocation first and fallback quickly to a 0-order
    allocation if such a high-order one cannot be done cheaply and
    without reclaim. From Eric Dumazet.

 5) Fix firmware download errors in btusb bluetooth driver, from Ethan
    Hsieh.

 6) Missing Kconfig deps for QCOM_EMAC, from Geert Uytterhoeven.

 7) Fix MDIO_XGENE dup Kconfig entry. From Laura Abbott.

 8) Constrain ipv6 rtr_solicits sysctl values properly, from Maciej
    Żenczykowski.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (65 commits)
  netfilter: Fix slab corruption.
  be2net: Enable VF link state setting for BE3
  be2net: Fix TX stats for TSO packets
  be2net: Update Copyright string in be_hw.h
  be2net: NCSI FW section should be properly updated with ethtool for BE3
  be2net: Provide an alternate way to read pf_num for BEx chips
  wan/fsl_ucc_hdlc: Fix size used in dma_free_coherent()
  net: macb: NULL out phydev after removing mdio bus
  xen-netback: make sure that hashes are not send to unaware frontends
  Fixing a bug in team driver due to incorrect 'unsigned int' to 'int' conversion
  MAINTAINERS: add myself as a maintainer of xen-netback
  ipv6 addrconf: disallow rtr_solicits < -1
  Bluetooth: btusb: Fix atheros firmware download error
  drivers: net: phy: Correct duplicate MDIO_XGENE entry
  ethernet: qualcomm: QCOM_EMAC should depend on HAS_DMA and HAS_IOMEM
  net: ethernet: mediatek: remove hwlro property in the device tree
  net: ethernet: mediatek: get hw lro capability by the chip id instead of by the dtsi
  net: ethernet: mediatek: get the chip id by ETHDMASYS registers
  net: bgmac: Fix errant feature flag check
  netlink: do not enter direct reclaim from netlink_dump()
  ...

Use the correct pattern for singly linked list insertion and
deletion.  We can also calculate the list head outside of the
mutex.

Fixes: e3b37f11 ("netfilter: replace list_head with single linked list")
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Reviewed-by: Aaron Conole <aconole@bytheb.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/netfilter/core.c | 108 ++++++++++++++++-----------------------------------
 1 file changed, 33 insertions(+), 75 deletions(-)

Pull more vfs updates from Al Viro:
 ">rename2() work from Miklos + current_time() from Deepa"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  fs: Replace current_fs_time() with current_time()
  fs: Replace CURRENT_TIME_SEC with current_time() for inode timestamps
  fs: Replace CURRENT_TIME with current_time() for inode timestamps
  fs: proc: Delete inode time initializations in proc_alloc_inode()
  vfs: Add current_time() api
  vfs: add note about i_op->rename changes to porting
  fs: rename "rename2" i_op to "rename"
  vfs: remove unused i_op->rename
  fs: make remaining filesystems use .rename2
  libfs: support RENAME_NOREPLACE in simple_rename()
  fs: support RENAME_NOREPLACE for local filesystems
  ncpfs: fix unused variable warning

Pull MTD updates from Brian Norris:
 "I've not been very active this cycle, so these are mostly from Boris,
  for the NAND flash subsystem.

  NAND:

   - Add the infrastructure to automate NAND timings configuration

   - Provide a generic DT property to maximize ECC strength

   - Some refactoring in the core bad block table handling, to help with
     improving some of the logic in error cases.

   - Minor cleanups and fixes

  MTD:

   - Add APIs for handling page pairing; this is necessary for reliably
     supporting MLC and TLC NAND flash, where paired-page disturbance
     affects reliability. Upper layers (e.g., UBI) should make use of
     these in the near future"

* tag 'for-linus-20161008' of git://git.infradead.org/linux-mtd: (35 commits)
  mtd: nand: fix trivial spelling error
  mtdpart: Propagate _get/put_device()
  mtd: nand: Provide nand_cleanup() function to free NAND related resources
  mtd: Kill the OF_MTD Kconfig option
  mtd: nand: mxc: Test CONFIG_OF instead of CONFIG_OF_MTD
  mtd: nand: Fix nand_command_lp() for 8bits opcodes
  mtd: nand: sunxi: Support ECC maximization
  mtd: nand: Support maximizing ECC when using software BCH
  mtd: nand: Add an option to maximize the ECC strength
  mtd: nand: mxc: Add timing setup for v2 controllers
  mtd: nand: mxc: implement onfi get/set features
  mtd: nand: sunxi: switch from manual to automated timing config
  mtd: nand: automate NAND timings selection
  mtd: nand: Expose data interface for ONFI mode 0
  mtd: nand: Add function to convert ONFI mode to data_interface
  mtd: nand: convert ONFI mode into data interface
  mtd: nand: Introduce nand_data_interface
  mtd: nand: Create a NAND reset function
  mtd: nand: remove unnecessary 'extern' from function declarations
  MAINTAINERS: Add maintainer entry for Ingenic JZ4780 NAND driver
  ...

Pull vfs xattr updates from Al Viro:
 "xattr stuff from Andreas

  This completes the switch to xattr_handler ->get()/->set() from
  ->getxattr/->setxattr/->removexattr"

* 'work.xattr' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  vfs: Remove {get,set,remove}xattr inode operations
  xattr: Stop calling {get,set,remove}xattr inode operations
  vfs: Check for the IOP_XATTR flag in listxattr
  xattr: Add __vfs_{get,set,remove}xattr helpers
  libfs: Use IOP_XATTR flag for empty directory handling
  vfs: Use IOP_XATTR flag for bad-inode handling
  vfs: Add IOP_XATTR inode operations flag
  vfs: Move xattr_resolve_name to the front of fs/xattr.c
  ecryptfs: Switch to generic xattr handlers
  sockfs: Get rid of getxattr iop
  sockfs: getxattr: Fail with -EOPNOTSUPP for invalid attribute names
  kernfs: Switch to generic xattr handlers
  hfs: Switch to generic xattr handlers
  jffs2: Remove jffs2_{get,set,remove}xattr macros
  xattr: Remove unnecessary NULL attribute name check

Pull crypto updates from Herbert Xu:
 "Here is the crypto update for 4.9:

  API:
   - The crypto engine code now supports hashes.

  Algorithms:
   - Allow keys >= 2048 bits in FIPS mode for RSA.

  Drivers:
   - Memory overwrite fix for vmx ghash.
   - Add support for building ARM sha1-neon in Thumb2 mode.
   - Reenable ARM ghash-ce code by adding import/export.
   - Reenable img-hash by adding import/export.
   - Add support for multiple cores in omap-aes.
   - Add little-endian support for sha1-powerpc.
   - Add Cavium HWRNG driver for ThunderX SoC"

* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (137 commits)
  crypto: caam - treat SGT address pointer as u64
  crypto: ccp - Make syslog errors human-readable
  crypto: ccp - clean up data structure
  crypto: vmx - Ensure ghash-generic is enabled
  crypto: testmgr - add guard to dst buffer for ahash_export
  crypto: caam - Unmap region obtained by of_iomap
  crypto: sha1-powerpc - little-endian support
  crypto: gcm - Fix IV buffer size in crypto_gcm_setkey
  crypto: vmx - Fix memory corruption caused by p8_ghash
  crypto: ghash-generic - move common definitions to a new header file
  crypto: caam - fix sg dump
  hwrng: omap - Only fail if pm_runtime_get_sync returns < 0
  crypto: omap-sham - shrink the internal buffer size
  crypto: omap-sham - add support for export/import
  crypto: omap-sham - convert driver logic to use sgs for data xmit
  crypto: omap-sham - change the DMA threshold value to a define
  crypto: omap-sham - add support functions for sg based data handling
  crypto: omap-sham - rename sgl to sgl_tmp for deprecation
  crypto: omap-sham - align algorithms on word offset
  crypto: omap-sham - add context export/import stubs
  ...

Pull dlm fix from David Teigland:
 "This includes a bug fix for a bad memory access during workqueue
  cleanup, which can happen while shutting down the dlm networking
  layer"

* tag 'dlm-4.9' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/linux-dlm:
  dlm: free workqueues after the connections

Pull Ceph updates from Ilya Dryomov:
 "The big ticket item here is support for rbd exclusive-lock feature,
  with maintenance operations offloaded to userspace (Douglas Fuller,
  Mike Christie and myself). Another block device bullet is a series
  fixing up layering error paths (myself).

  On the filesystem side, we've got patches that improve our handling of
  buffered vs dio write races (Neil Brown) and a few assorted fixes from
  Zheng. Also included a couple of random cleanups and a minor CRUSH
  update"

* tag 'ceph-for-4.9-rc1' of git://github.com/ceph/ceph-client: (39 commits)
  crush: remove redundant local variable
  crush: don't normalize input of crush_ln iteratively
  libceph: ceph_build_auth() doesn't need ceph_auth_build_hello()
  libceph: use CEPH_AUTH_UNKNOWN in ceph_auth_build_hello()
  ceph: fix description for rsize and rasize mount options
  rbd: use kmalloc_array() in rbd_header_from_disk()
  ceph: use list_move instead of list_del/list_add
  ceph: handle CEPH_SESSION_REJECT message
  ceph: avoid accessing / when mounting a subpath
  ceph: fix mandatory flock check
  ceph: remove warning when ceph_releasepage() is called on dirty page
  ceph: ignore error from invalidate_inode_pages2_range() in direct write
  ceph: fix error handling of start_read()
  rbd: add rbd_obj_request_error() helper
  rbd: img_data requests don't own their page array
  rbd: don't call rbd_osd_req_format_read() for !img_data requests
  rbd: rework rbd_img_obj_exists_submit() error paths
  rbd: don't crash or leak on errors in rbd_img_obj_parent_read_full_callback()
  rbd: move bumping img_request refcount into rbd_obj_request_submit()
  rbd: mark the original request as done if stat request fails
  ...

This reverts commit 5d8eb6fe.

When we remove devices, we free the device structures.  Delaying
btfs_remove_chunk() ends up hitting a use-after-free on them.
Signed-off-by: Chris Mason <clm@fb.com>