Using perf record 'cyclacc' option in cs_etm event was not setting up cycle
accurate trace correctly.

Corrects bit set in TRCCONFIGR to enable cycle accurate trace.
Programs TRCCCCTLR with a valid threshold value as required by ETMv4 spec.
Signed-off-by: Mike Leach <mike.leach@linaro.org>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Commit d52c9750 ("coresight: reset "enable_sink" flag when need be")
caused a kernel panic because of the using of an invalid value: after
'for_each_cpu(cpu, mask)', value of local variable 'cpu' become invalid,
causes following 'cpu_to_node' access invalid memory area.

This patch brings the deleted 'cpu = cpumask_first(mask)' back.

Panic log:

 $ perf record -e cs_etm// ls

 Unable to handle kernel paging request at virtual address fffe801804af4f10
 pgd = ffff8017ce031600
 [fffe801804af4f10] *pgd=0000000000000000, *pud=0000000000000000
 Internal error: Oops: 96000004 [#1] SMP
 Modules linked in:
 CPU: 33 PID: 1619 Comm: perf Not tainted 4.7.1+ #16
 Hardware name: Huawei Taishan 2280 /CH05TEVBA, BIOS 1.10 11/24/2016
 task: ffff8017cb0c8400 ti: ffff8017cb154000 task.ti: ffff8017cb154000
 PC is at tmc_alloc_etf_buffer+0x60/0xd4
 LR is at tmc_alloc_etf_buffer+0x44/0xd4
 pc : [<ffff000008633df8>] lr : [<ffff000008633ddc>] pstate: 60000145
 sp : ffff8017cb157b40
 x29: ffff8017cb157b40 x28: 0000000000000000
 ...skip...
 7a60: ffff000008c64dc8 0000000000000006 0000000000000253 ffffffffffffffff
 7a80: 0000000000000000 0000000000000000 ffff0000080872cc 0000000000000001
 [<ffff000008633df8>] tmc_alloc_etf_buffer+0x60/0xd4
 [<ffff000008632b9c>] etm_setup_aux+0x1dc/0x1e8
 [<ffff00000816eed4>] rb_alloc_aux+0x2b0/0x338
 [<ffff00000816a5e4>] perf_mmap+0x414/0x568
 [<ffff0000081ab694>] mmap_region+0x324/0x544
 [<ffff0000081abbe8>] do_mmap+0x334/0x3e0
 [<ffff000008191150>] vm_mmap_pgoff+0xa4/0xc8
 [<ffff0000081a9a30>] SyS_mmap_pgoff+0xb0/0x22c
 [<ffff0000080872e4>] sys_mmap+0x18/0x28
 [<ffff0000080843f0>] el0_svc_naked+0x24/0x28
 Code: 912040a5 d0001c00 f873d821 911c6000 (b8656822)
 ---[ end trace 98933da8f92b0c9a ]---
Signed-off-by: Wang Nan <wangnan0@huawei.com>
Cc: Xia Kaixu <xiakaixu@huawei.com>
Cc: Li Zefan <lizefan@huawei.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Fixes: d52c9750 ("coresight: reset "enable_sink" flag when need be")
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: stable <stable@vger.kernel.org> # 4.10
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Commit 050c3d52 ("vme: make core
vme support explicitly non-modular") dropped the remove function
because it appeared as if it was for removal of the bus, which is
not supported.

However, vme_bus_remove() is called when a VME device is removed
from the bus and not when the bus is removed; as it calls the VME
device driver's cleanup function.  Without this function, the
remove() in the VME device driver is never called and VME device
drivers cannot be reloaded again.

Here we restore the remove function that was deleted in that
commit, and the reference to the function in the bus structure.

Fixes: 050c3d52 ("vme: make core vme support explicitly non-modular")
Cc: Manohar Vanga <manohar.vanga@gmail.com>
Acked-by: Martyn Welch <martyn@welchs.me.uk>
Cc: devel@driverdev.osuosl.org
Signed-off-by: Stefano Babic <sbabic@denx.de>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: stable <stable@vger.kernel.org> # 4.9
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

No jprobe is registered when the module is loaded without specifying a
crashpoint that uses a jprobe. At the moment, we unconditionally try to
unregister the jprobe on module unload which results in an Oops. Add a
check to fix this.
Signed-off-by: Juerg Haefliger <juerg.haefliger@hpe.com>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

No need to set .owner here. The core will do it.

Generated by: scripts/coccinelle/api/platform_no_drv_owner.cocci

CC: Serge Semin <fancer.lancer@gmail.com>
Signed-off-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

The error return path When csraddr_str fails to free buf, causing a
memory leak. Fix this by returning via the free_buf label that
performs the necessary cleanup.
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Remove unused variables which generates these warnings:
[linux-4.10-rc5/drivers/char/xilinx_hwicap/buffer_icap.c:301]: (style)
Variable 'num_writes' is modified but its new value is never used.
[linux-4.10-rc5/drivers/char/xilinx_hwicap/buffer_icap.c:356]: (style)
Variable 'read_count' is modified but its new value is never used.
Reported-by: David Binderman <dcb314@hotmail.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Merge tag 'extcon-next-for-4.11' of git://git.kernel.org/pub/scm/linux/kernel/git/chanwoo/extcon into char-misc-next

Chanwoo writes:

Update extcon for 4.11

Detailed description for this pull request:
1. Add the new extcon driver.
- Intel INT3496 ACPI USB id detection driver detects whether
  EXTCON_USB_HOST is attached or detached. (extcon-intel-int3496.c)

2. Add the new type of external connector.
- EXTCON_CHG_USB_PD (USB Power Delivery) provides the increased
  power more than 7.5W to device with larger power demand.

3. Add the description for EXTCON_CHG_USB_(SDP|ACA|SLOW|FAST)
- EXTCON_CHG_USB_SDP should always appear together with EXTCON_USB
- EXTCON_CHG_USB_ACA would normally appear with EXTCON_USB_HOST.
- EXTCON_CHG_USB_SLOW can provide at least 500mA of current at 5V
- EXTCON_CHG_USB_FAST can provide at least 1A of current at 5V.

4. Modify the connector name of EXTCON_USB_HOST
- "USB_HOST" -> "USB-HOST"

5. Update the extcon core
- Move the private extcon structure into driver/extcon directory.
  The 'struct extcon_dev' should be only handled by extcon core
  to prevent the direct access and to maintain the integrity of it.
- Remove the ambigous operation of extcon_register_notifier()
  in case of the 'extcon_dev' instance is NULL. The user of
  extcon_register_notifier() have to specify the correct instance
  of the provider extcon driver.

6. Update the extcon drivers and fix the minor issues
- Update the extcon-axp288 driver to remove the unncessary code.
- Add pinctrl operation during suspend mode to extcon-usb-gpio driver.
- Clean up the extcon-arizona/adc-jack driver.
- Use the dev_dbg() for debug messsage on extcon-palmas driver.
- Return the error code on failure of extcon_sync()

User is not interested in USB cable events appearing on the
console. Use dev_dbg() instead of dev_info() for these events.
Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>

Get rid of all unused definitions.
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

As part of cleaning up architecture specific code, define APIs
to manage interrupt state.
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

As part of cleaning up architecture specific code, define an API
to retrieve the virtual procesor index.
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

As part of cleaning up architecture specific code, define APIs
to manipulate the interrupt controller state.
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

As part of cleaning up architecture specific code, define APIs
to manipulate the event page.
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

As part of cleaning up architecture specific code, define APIs
to manipulate the message page.
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

The version variable while it is initialized is not used;
get rid of it.
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

As part of the effort to interact with Hyper-V in an instruction set
architecture independent way, use the new API to get the current
tick.
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Move the relevant code that programs the hypervisor to an architecture
specific file.
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

As part of the effort to separate out architecture specific code, move the
code for signaling end of message.
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

As part of the effort to separate out architecture specific code, move the
check for detecting if the hypercall page is setup.
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

As part of the effort to separate out architecture specific code, move the
crash notification function.
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

As part of the effort to separate out architecture specific code,
extract hypervisor version information in an architecture specific
file.
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

As part of the effort to separate out architecture specific code,
consolidate all Hyper-V specific clocksource code to an architecture
specific code.
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

mei_cl_set_disconnected is used only in client.c,
so make it local to the file and mark static.
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

mei_io_list_flush is used only in client.c
so make it local to the file and mark static.
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

After the latest change to make sure the compiler actually does a memset,
it is now smart enough to flag the stack overflow at compile time,
at least with gcc-7.0:

drivers/misc/lkdtm_bugs.c: In function 'lkdtm_CORRUPT_STACK':
drivers/misc/lkdtm_bugs.c:88:144: warning: 'memset' writing 64 bytes into a region of size 8 overflows the destination [-Wstringop-overflow=]

To outsmart the compiler again, this moves the memset into a noinline
function where (for now) it doesn't see that we intentionally write
broken code here.

Fixes: c55d2400 ("lkdtm: Prevent the compiler from optimising lkdtm_CORRUPT_STACK()")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

The stm is automatically enabled when an application sets the policy
via ->link() call back by using coresight_enable(), which keeps the
refcount of the current users of the STM. However, the unlink() callback
issues stm_disable() directly, which leaves the STM turned off, without
the coresight layer knowing about it. This prevents any further uses
of the STM hardware as the coresight layer still thinks the STM is
turned on and doesn't enable the hardware when required. Even manually
enabling the STM via sysfs can't really enable the hw.

e.g,

 $ echo 1 > $CS_DEVS/$ETR/enable_sink
 $ mkdir -p $CONFIG_FS/stp-policy/$source.0/stm_test/
 $ echo 32768 65535 > $CONFIG_FS/stp-policy/$source.0/stm_test/channels
 $ echo 64 > $CS_DEVS/$source/traceid
 $ ./stm_app
 Sending 64000 byte blocks of pattern 0 at 0us intervals
 Success to map channel(32768~32783) to 0xffffa95fa000
 Sending on channel 32768
 $ dd if=/dev/$ETR of=~/trace.bin.1
 597+1 records in
 597+1 records out
 305920 bytes (306 kB) copied, 0.399952 s, 765 kB/s
 $ ./stm_app
 Sending 64000 byte blocks of pattern 0 at 0us intervals
 Success to map channel(32768~32783) to 0xffff7e9e2000
 Sending on channel 32768
 $ dd if=/dev/$ETR of=~/trace.bin.2
 0+0 records in
 0+0 records out
 0 bytes (0 B) copied, 0.0232083 s, 0.0 kB/s

 Note that we don't get any data from the ETR for the second session.

 Also dmesg shows :

 [   77.520458] coresight-tmc 20800000.etr: TMC-ETR enabled
 [   77.537097] coresight-replicator etr_replicator@20890000: REPLICATOR enabled
 [   77.558828] coresight-replicator main_replicator@208a0000: REPLICATOR enabled
 [   77.581068] coresight-funnel 208c0000.main_funnel: FUNNEL inport 0 enabled
 [   77.602217] coresight-tmc 20840000.etf: TMC-ETF enabled
 [   77.618422] coresight-stm 20860000.stm: STM tracing enabled
 [  139.554252] coresight-stm 20860000.stm: STM tracing disabled
  # End of first tracing session
 [  146.351135] coresight-tmc 20800000.etr: TMC read start
 [  146.514486] coresight-tmc 20800000.etr: TMC read end
  # Note that the STM is not turned on via stm_generic_link()->coresight_enable()
  # and hence none of the components are turned on.
 [  152.479080] coresight-tmc 20800000.etr: TMC read start
 [  152.542632] coresight-tmc 20800000.etr: TMC read end

This patch fixes the problem by balancing the unlink operation by using
the coresight_disable(), keeping the coresight layer in sync with the
hardware state and thus allowing normal usage of the STM component.

Fixes: commit 237483aa ("coresight: stm: adding driver for CoreSight STM component")
Cc: Pratik Patel <pratikp@codeaurora.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: stable@vger.kernel.org # 4.7+
Acked-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Reviewed-by: Chunyan Zhang <zhang.chunyan@linaro.org>
Reported-by: Robert Walker <robert.walker@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

The aemif driver can now access struct of_dev_auxdata (using platform
data).

Add the device id to the clock lookup table for the nand clock and
create a separate lookup table for aemif subnodes.
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

TI aemif driver creates its own subnodes of the device tree in order
to guarantee that all child devices are probed after the AEMIF timing
parameters are configured.

Some devices (e.g. da850) use struct of_dev_auxdata for clock lookup
but nodes created from within the aemif driver can't access the lookup
table.

Create a platform data structure that holds a pointer to
of_dev_auxdata so that we can use it with of_platform_populate().
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Acked-by: Sekhar Nori <nsekhar@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

PC/104 form factor devices serve a specific niche of embedded system
users; most Linux users will not have PC/104 form factor devices. This
patch introduces the PC104 Kconfig option, which should be used to
filter PC/104 specific device drivers and options, so that only those
users interested in PC/104 related options are exposed to them.
Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

As part of the effort to separate out architecture specific code, move the
hypercall invocation code to an architecture specific file.
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

As part of the effort to separate out architecture specific code, move the
hypercall page setup to an architecture specific file.
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

As part of the effort to separate out architecture specific code, move the
definition of generate_guest_id() to x86 specific header file.
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

As part of the effort to separate out architecture specific code, move the
definition of hv_x64_msr_hypercall_contents to x86 specific header file.
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

IDT 89HPESx PCIe-switches exposes SMBus interface to have an access to
the device CSRs and EEPROM. So to properly utilize the interface
functionality, developer should declare a valid dts-file node, which
would refer to the corresponding 89HPESx device.
Signed-off-by: Serge Semin <fancer.lancer@gmail.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

  This driver provides an access to EEPROM of IDT PCIe-switches. IDT PCIe-
switches expose a simple SMBus interface to perform IO-operations from/to
EEPROM, which is located at private (so called Master) SMBus. The driver
creates a simple binary sysfs-file to have an access to the EEPROM using
the SMBus-slave interface in the i2c-device susfs-directory:
     /sys/bus/i2c/devices/<bus>-<devaddr>/eeprom
In case if read-only flag is specified at dts-node of the device, User-space
applications won't be able to write to the EEPROM sysfs-node.

  Additionally IDT 89HPESx SMBus interface has an ability to read/write
values of device CSRs. This driver exposes debugfs-file to perform simple
IO-operations using that ability for just basic debug purpose. Particularly
the next file is created in the specific debugfs-directory:
     /sys/kernel/debug/idt_csr/
Format of the debugfs-file value is:
     $ cat /sys/kernel/debug/idt_csr/<bus>-<devaddr>/<devname>;
     <CSR address>:<CSR value>
So reading the content of the file gives current CSR address and it value.
If User-space application wishes to change current CSR address, it can just
write a proper value to the sysfs-file:
     $ echo "<CSR address>" >
         /sys/kernel/debug/idt_csr/<bus>-<devaddr>/<devname>
If it wants to change the CSR value as well, the format of the write
operation is:
     $ echo "<CSR address>:<CSR value>" > \
         /sys/kernel/debug/idt_csr/<bus>-<devaddr>/<devname>;
CSR address and value can be any of hexadecimal, decimal or octal format.
Signed-off-by: Serge Semin <fancer.lancer@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Don't sort the list of string-similar Kconfig symbols alphabetically to
preserve the correct order of string similarity.
Signed-off-by: Valentin Rothberg <valentinrothberg@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

We want the char/misc fixes in here as well.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Pull namespace fixes from Eric Biederman:
 "This tree contains 4 fixes.

  The first is a fix for a race that can causes oopses under the right
  circumstances, and that someone just recently encountered.

  Past that are several small trivial correct fixes. A real issue that
  was blocking development of an out of tree driver, but does not appear
  to have caused any actual problems for in-tree code. A potential
  deadlock that was reported by lockdep. And a deadlock people have
  experienced and took the time to track down caused by a cleanup that
  removed the code to drop a reference count"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace:
  sysctl: Drop reference added by grab_header in proc_sys_readdir
  pid: fix lockdep deadlock warning due to ucount_lock
  libfs: Modify mount_pseudo_xattr to be clear it is not a userspace mount
  mnt: Protect the mountpoint hashtable with mount_lock