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Sara Sharon c67fa16945 iwlwifi: fix access to prph when transport is stopped
[ Upstream commit 0232d2cd7a ]

When getting HW rfkill we get stop_device being called from
two paths.
One path is the IRQ calling stop device, and updating op
mode and stack.
As a result, cfg80211 is running rfkill sync work that shuts
down all devices (second path).
In the second path, we eventually get to iwl_mvm_stop_device
which calls iwl_fw_dump_conf_clear->iwl_fw_dbg_stop_recording,
that access periphery registers.
The device may be stopped at this point from the first path,
which will result with a failure to access those registers.
Simply checking for the trans status is insufficient, since
the race will still exist, only minimized.
Instead, move the stop from iwl_fw_dump_conf_clear (which is
getting called only from stop path) to the transport stop
device function, where the access is always safe.
This has the added value, of actually stopping dbgc before
stopping device even when the stop is initiated from the
transport.

Fixes: 1efc3843a4 ("iwlwifi: stop dbgc recording before stopping DMA")
Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2018-02-03 17:39:16 +01:00
arch KVM: Let KVM_SET_SIGNAL_MASK work as advertised 2018-02-03 17:39:06 +01:00
block block: don't let passthrough IO go into .make_request_fn() 2018-01-02 20:31:05 +01:00
certs License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
crypto crypto: af_alg - whitelist mask and type 2018-02-03 17:38:51 +01:00
Documentation x86/pti: Document fix wrong index 2018-01-23 19:58:20 +01:00
drivers iwlwifi: fix access to prph when transport is stopped 2018-02-03 17:39:16 +01:00
firmware License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
fs xfs: Properly retry failed dquot items in case of error during buffer writeback 2018-02-03 17:39:15 +01:00
include KVM: Let KVM_SET_SIGNAL_MASK work as advertised 2018-02-03 17:39:06 +01:00
init bpf: introduce BPF_JIT_ALWAYS_ON config 2018-01-31 14:03:49 +01:00
ipc License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
kernel perf/core: Fix memory leak triggered by perf --namespace 2018-02-03 17:39:15 +01:00
lib bpf: introduce BPF_JIT_ALWAYS_ON config 2018-01-31 14:03:49 +01:00
mm kmemleak: add scheduling point to kmemleak_scan() 2018-02-03 17:39:12 +01:00
net SUNRPC: Allow connect to return EHOSTUNREACH 2018-02-03 17:39:11 +01:00
samples samples/bpf: adjust rlimit RLIMIT_MEMLOCK for xdp1 2017-12-20 10:10:31 +01:00
scripts scripts/faddr2line: extend usage on generic arch 2018-02-03 17:39:12 +01:00
security ima/policy: fix parsing of fsuuid 2018-02-03 17:38:53 +01:00
sound ALSA: hda - Reduce the suspend time consumption for ALC256 2018-02-03 17:38:48 +01:00
tools cpupower : Fix cpupower working when cpu0 is offline 2018-02-03 17:38:55 +01:00
usr initramfs: fix initramfs rebuilds w/ compression after disabling 2017-11-03 07:39:19 -07:00
virt KVM: Let KVM_SET_SIGNAL_MASK work as advertised 2018-02-03 17:39:06 +01:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.get_maintainer.ignore Add hch to .get_maintainer.ignore 2015-08-21 14:30:10 -07:00
.gitattributes .gitattributes: set git diff driver for C source code files 2016-10-07 18:46:30 -07:00
.gitignore kbuild: Add support to generate LLVM assembly files 2017-04-25 08:13:52 +09:00
.mailmap .mailmap: Add Maciej W. Rozycki's Imagination e-mail address 2017-11-10 12:16:15 -08:00
COPYING [PATCH] update FSF address in COPYING 2005-09-10 10:06:29 -07:00
CREDITS MAINTAINERS: update TPM driver infrastructure changes 2017-11-09 17:58:40 -08:00
Kbuild License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
Kconfig License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
MAINTAINERS Merge branch 'akpm' (patches from Andrew) 2017-11-09 18:26:51 -08:00
Makefile Linux 4.14.16 2018-01-31 14:03:50 +01:00
README README: add a new README file, pointing to the Documentation/ 2016-10-24 08:12:35 -02:00

Linux kernel
============

This file was moved to Documentation/admin-guide/README.rst

Please notice that there are several guides for kernel developers and users.
These guides can be rendered in a number of formats, like HTML and PDF.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.