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[ Upstream commit45a2702ce1] During Coldboot stress tests, system encountered the following panic. Panic logs depicts rt5682_i2c_shutdown() happened first and then later jack detect handler workqueue function triggered. This situation causes panic as rt5682_i2c_shutdown() resets codec. Fix this panic by cancelling all jack detection delayed work. Panic log: [ 20.936124] sof_pci_shutdown [ 20.940248] snd_sof_device_shutdown [ 20.945023] snd_sof_shutdown [ 21.126849] rt5682_i2c_shutdown [ 21.286053] rt5682_jack_detect_handler [ 21.291235] BUG: kernel NULL pointer dereference, address: 000000000000037c [ 21.299302] #PF: supervisor read access in kernel mode [ 21.305254] #PF: error_code(0x0000) - not-present page [ 21.311218] PGD 0 P4D 0 [ 21.314155] Oops: 0000 [#1] PREEMPT SMP NOPTI [ 21.319206] CPU: 2 PID: 123 Comm: kworker/2:3 Tainted: G U 5.4.68 #10 [ 21.333687] ACPI: Preparing to enter system sleep state S5 [ 21.337669] Workqueue: events_power_efficient rt5682_jack_detect_handler [snd_soc_rt5682] [ 21.337671] RIP: 0010:rt5682_jack_detect_handler+0x6c/0x279 [snd_soc_rt5682] Fixes:a50067d4f3('ASoC: rt5682: split i2c driver into separate module') Signed-off-by: Jairaj Arava <jairaj.arava@intel.com> Signed-off-by: Sathyanarayana Nujella <sathyanarayana.nujella@intel.com> Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@intel.com> Reviewed-by: Shuming Fan <shumingf@realtek.com> Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com> Link: https://lore.kernel.org/r/20210205171428.2344210-1-ranjani.sridharan@linux.intel.com Signed-off-by: Mark Brown <broonie@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
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.