- 26 Mar, 2009 40 commits
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Martin Schwidefsky authored
Signed-off-by:Martin Schwidefsky <schwidefsky@de.ibm.com>
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Christian Borntraeger authored
This patch fixes two addresses in the comments for the lowcore structure. Looks like an copy-paste bug. Signed-off-by:
Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by:
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Dan Smith authored
We need to use this value in the checkpoint/restart code and would like to have a constant instead of a magic '3'. Cc: linux-s390@vger.kernel.org Signed-off-by:
Dan Smith <danms@us.ibm.com> Signed-off-by:
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Eric Sesterhenn authored
Trivial cleanup, list_del(); list_add{,_tail}() is equivalent to list_move{,_tail}(). Semantic patch for coccinelle can be found at www.cccmz.de/~snakebyte/list_move_tail.spatch Signed-off-by:Eric Sesterhenn <snakebyte@gmx.de> Signed-off-by:
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Carsten Otte authored
This is a cleanup of all the messages this driver prints. It uses the dev_message macros now. Signed-off-by:
Carsten Otte <cotte@de.ibm.com> Signed-off-by:
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Heiko Carstens authored
Use builtin variants if gcc 4 or newer is used to compile the kernel. Generates better code than the asm variants. Signed-off-by:
Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by:
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Martin Schwidefsky authored
Avoid the detour over the PLT if the branch target of a function call in a module is in the range of the bras (16-bit) or brasl (32-bit) instruction. The PLT is still generated but it is unused. Signed-off-by: -
Heiko Carstens authored
likely/unlikely profiling revealed that none of the branches in bitops is taken likely or unlikely. So remove the annotations. In addition the generated code is shorter. Signed-off-by:
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Hendrik Brueckner authored
strlcpy() does already NUL-terminate the destination string. Signed-off-by:
Hendrik Brueckner <brueckner@linux.vnet.ibm.com> Signed-off-by:
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Rusty Russell authored
In introducing a trivial "strstarts()" function in linux/string.h, we hit the following error on s390: In file included from include/linux/bitmap.h:8, from include/linux/cpumask.h:142, from include/linux/smp.h:12, from /home/rusty/devel/kernel/patches/linux-2.6/arch/s390/include/asm/spinlock.h:14, from include/linux/spinlock.h:88, from include/linux/seqlock.h:29, from include/linux/time.h:8, from include/linux/stat.h:60, from include/linux/module.h:10, from arch/s390/lib/string.c:13: include/linux/string.h: In function 'strstarts': include/linux/string.h:124: error: implicit declaration of function 'strlen' include/linux/string.h:124: warning: incompatible implicit declaration of built-in function 'strlen' Because when including asm/string.h from arch/s390/lib/string.c we don't declare the string ops we are about to define, and linux/string.h barfs. The fix is to declare them in this IN_ARCH_STRING_C case, but in general I wonder if there's a neater fix. Reported-by: linux-next Signed-off-by:Rusty Russell <rusty@rustcorp.com.au> Signed-off-by:
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Jan Glauber authored
The inbound and outbound handlers are nearly identical if the outbound handler uses first_to_check as end index instead of last_move. Since both values are identical at that point the handlers can be merged. Signed-off-by:
Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by:
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Jan Glauber authored
Errors from SIGA instructions are stored in the per queue qdio_error and reported back when the queue handler is called. That opens a race when multiple error conditions occur simultanously. Report SIGA errors immediately in the return value of do_QDIO so the upper layer can react and SIGA errors no longer interfere with other errors. Move the SIGA error handling in qeth from the outbound handler to qeth_flush_buffers. Signed-off-by: -
Jan Glauber authored
If the qdio module is unloaded the tiqdio tasklet must be terminated by tasklet_kill. Move the tasklet_kill after the unregistration of the adapter interrupt so the tiqdio tasklet will not be scheduled anymore before calling tasklet_kill. Signed-off-by:
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Jan Glauber authored
The index value that indicated that the input queue moved was also used to store the index of the first acknowledged buffer. For non-qebsm only the newest buffer is acknowledged which may be different from the last move index so two seperate values are needed to track the input queue. Signed-off-by:
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Jan Glauber authored
The ACKnowledgement state should be set on the newest SBAL so an adapter interrupt surpression check needs to scan fewer SBALs. Signed-off-by:
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Jan Glauber authored
qdio_cleanup is a wrapper function that should call qdio_shutdown and qdio_free. qdio_free was not called if an error occured in qdio_shutdown resulting in a missing free of allocated resources. Call qdio_free regardless of the return value of qdio_shutdown. Signed-off-by:
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Jan Glauber authored
The queue tasklets were stopped with tasklet_disable. Although tasklet_disable prevents the tasklet from beeing executed it is still possible that a tasklet is scheduled on a CPU at that point. A following qdio_establish calls tasklet_init which clears the tasklet count and the tasklet state leading to the following Oops: <2>kernel BUG at kernel/softirq.c:392! <4>illegal operation: 0001 [#1] SMP <4>Modules linked in: iptable_filter ip_tables x_tables dm_round_robin dm_multipath scsi_dh sg sd_mod crc_t10dif nfs lockd nfs _acl sunrpc fuse loop dm_mod qeth_l3 ipv6 zfcp qeth scsi_transport_fc qdio scsi_tgt scsi_mod chsc_sch ccwgroup dasd_eckd_mod dasdm od ext3 mbcache jbd <4>Supported: Yes <4>CPU: 0 Not tainted 2.6.27.13-1.1.mz13-default #1 <4>Process blast.LzS_64 (pid: 16445, task: 000000006cc02538, ksp: 000000006cb67998) <4>Krnl PSW : 0704c00180000000 00000000001399f4 (tasklet_action+0xc8/0x1d4) <4> R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:3 CC:0 PM:0 EA:3 <4>Krnl GPRS: ffffffff00000030 0000000000000002 0000000000000002 fffffffffffffffe <4> 000000000013aabe 00000000003b6a18 fffffffffffffffd 0000000000000000 <4> 00000000006705a8 000000007d0914a8 000000007d0914b0 000000007fecfd30 <4> 0000000000000000 00000000003b63e8 000000007fecfd90 000000007fecfd30 <4>Krnl Code: 00000000001399e8: b9200021 cgr %r2,%r1 <4> 00000000001399ec: a7740004 brc 7,1399f4 <4> 00000000001399f0: a7f40001 brc 15,1399f2 <4> >00000000001399f4: c0100027e8ee larl %r1,636bd0 <4> 00000000001399fa: bf1f1008 icm %r1,15,8(%r1) <4> 00000000001399fe: a7840019 brc 8,139a30 <4> 0000000000139a02: c0300027e8ef larl %r3,636be0 <4> 0000000000139a08: e3c030000004 lg %r12,0(%r3) <4>Call Trace: <4>([<0000000000139c12>] tasklet_hi_action+0x112/0x1d4) <4> [<000000000013aabe>] __do_softirq+0xde/0x1c4 <4> [<000000000010fa2e>] do_softirq+0x96/0xb0 <4> [<000000000013a8d8>] irq_exit+0x70/0xcc <4> [<000000000010d1d8>] do_extint+0xf0/0x110 <4> [<0000000000113b10>] ext_no_vtime+0x16/0x1a <4> [<000003e0000a3662>] ext3_dirty_inode+0xe6/0xe8 [ext3] <4>([<00000000001f6cf2>] __mark_inode_dirty+0x52/0x1d4) <4> [<000003e0000a44f0>] ext3_ordered_write_end+0x138/0x190 [ext3] <4> [<000000000018d5ec>] generic_perform_write+0x174/0x230 <4> [<0000000000190144>] generic_file_buffered_write+0xb4/0x194 <4> [<0000000000190864>] __generic_file_aio_write_nolock+0x418/0x454 <4> [<0000000000190ee2>] generic_file_aio_write+0x76/0xe4 <4> [<000003e0000a05c2>] ext3_file_write+0x3e/0xc8 [ext3] <4> [<00000000001cc2fe>] do_sync_write+0xd6/0x120 <4> [<00000000001ccfc8>] vfs_write+0xac/0x184 <4> [<00000000001cd218>] SyS_write+0x68/0xe0 <4> [<0000000000113402>] sysc_noemu+0x10/0x16 <4> [<0000020000043188>] 0x20000043188 <4>Last Breaking-Event-Address: <4> [<00000000001399f0>] tasklet_action+0xc4/0x1d4 <6>qdio: 0.0.c61b ZFCP on SC f67 using AI:1 QEBSM:0 PCI:1 TDD:1 SIGA: W AOP <4> <0>Kernel panic - not syncing: Fatal exception in interrupt Use tasklet_kill instead of tasklet_disbale. Since tasklet_schedule must not be called after tasklet_kill use the QDIO_IRQ_STATE_STOPPED to inidicate that a queue is going down and prevent further tasklet schedules in that case. Remove superflous tasklet_schedule from input queue setup, at that time the queues are not ready so the schedule results in a NOP. Signed-off-by: -
Jan Glauber authored
Remove the call to qdio_shutdown from qdio_activate since the upper-layer drivers are responsible to call qdio_shutdown when qdio_activate returns with an error. Signed-off-by:
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Jan Glauber authored
Add a mutex to protect the tiq_list. Although reading the list is done using RCU adding and removing elements from the list must still happen locked since multiple qdio devices may change the list in parallel otherwise. Signed-off-by:
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Felix Beck authored
Add zcrypt section in S390 part of MAINTAINERS file. Signed-off-by:
Felix Beck <felix.beck@de.ibm.com> Signed-off-by:
Ralph Wuerthner <ralph.wuerthner@de.ibm.com> Signed-off-by:
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Gerald Schaefer authored
Disable switch_amode by default because pagetable walk on pre z9 hardware has negative performance impact. Signed-off-by:
Gerald Schaefer <gerald.schaefer@de.ibm.com> Signed-off-by:
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Martin Schwidefsky authored
The clock sync mode flag CLOCK_SYNC_STP is not cleared when stp is set offline. In this case the get_sync_clock() function returns -EACCESS and the dasd driver will block all i/o until stp is enabled again. In addition get_sync_clock can return -EACCESS if the clock is not in sync instead of -EAGAIN. Rework the stp/etr online handling to fix these problems. Signed-off-by: -
Peter Oberparleiter authored
Subchannel reprobing can block the kslowcrw workqueue indefinitely while waiting for device recognition to finish which is also scheduled to run on kslowcrw. Prevent this deadlock by moving the waiting portion of subchannel reprobing to the cio workqueue. Signed-off-by:
Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by:
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Sebastian Ott authored
Remove unused subchannel pointer in io_subchannel_recog_done. Signed-off-by:
Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by:
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Peter Oberparleiter authored
Fix incorrect check for active I/O in interrogate function. Signed-off-by:
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Sebastian Ott authored
In some situations a rc in __chsc_do_secm will be overwritten by another one. This shouldn't do harm since todays callers don't check for _specific_ errors but fix it for the sake of correctness. Signed-off-by:
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Sebastian Ott authored
Writing only spaces to /proc/cio_ignore will cause a buffer overflow since the size_t value i will not become negative and so buf[-1UL] is accessed. Change the value of i to ssize_t. Signed-off-by:
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Sebastian Ott authored
For a ccw group device unbinding it from its driver should do the same as a call to ungroup, since this virtual device can not exist without a driver. Signed-off-by:
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Sebastian Ott authored
Some sanity checks in the ccw group driver test the output of container_of macros to be !NULL. Test the input parameters instead. Signed-off-by:
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Sebastian Ott authored
In case the ccw group driver refuses to set a device [on|off]line, we should transmit the return code to the caller. Signed-off-by:
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Sebastian Ott authored
MAX_ISC is a valid isc number, so arrays with an index of isc need to have a length of MAX_ISC+1 Signed-off-by:
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Sebastian Ott authored
Since some callers rely on for_each_subchannel_staged to not fail, fall back to brute force scanning using get_subchannel_by_schid in case of a oom situation. Signed-off-by:
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Heiko Carstens authored
Add barrier to prevent compiler from reloading pointer to irq handler. Signed-off-by:
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Heiko Carstens authored
The crw_unregister_handler uses xchg + synchronize_sched when unregistering a crw_handler. This doesn't protect crw_collect_info to potentially jump to NULL since it has unlocked code like this: if (crw_handlers[i]) crw_handlers[i](NULL, NULL, 1); So add a mutex which protects the crw handler array for changes. Signed-off-by: -
Sebastian Ott authored
In case the ccw driver refuses to set a device offline, we should transmit the return code to the caller. Signed-off-by:
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Cornelia Huck authored
Use ccw_device_set_notoper() (which also deletes the device timer and disables the subchannel) instead of simply setting the state to DEV_STATE_NOT_OPER in the generic not operational handling code. This prevents unexpected interrupts popping up for devices that are deemed not operational. Signed-off-by:
Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by:
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Cornelia Huck authored
Acting upon the assumption that cio_disable_subchannel() is only called when we really want to disable the subchannel (a) remove the check for activity (it is already done in ccw_device_offline(), which is the place where it matters) (b) collect pending status via tsch() and ignore it (it can't matter anymore since the subchannel will be disabled). Signed-off-by: -
Cornelia Huck authored
The common I/O layer may encounter a situation where the device number of a ccw device has changed or a device driver doesn't want to keep a formerly disconnected device becoming operational again. Instead of using device_del()/ device_add() as now, we can just unbind the driver from the device and rebind it to get the desired effect (rebinding) with less overhead. Signed-off-by:
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Heiko Carstens authored
Move all EXPORT_SYMBOLs to their corresponding definitions. Signed-off-by:
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Heiko Carstens authored
Signed-off-by:
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