ASoC: rt5682: Fix panic in rt5682_jack_detect_handler happening durin…

…g system shutdown

[ Upstream commit 45a2702 ]

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: a50067d ('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>

sound/soc/codecs/rt5682-i2c.c

@@ -268,6 +268,9 @@ static void rt5682_i2c_shutdown(struct i2c_client *client)
 {
 	struct rt5682_priv *rt5682 = i2c_get_clientdata(client);
 
+	cancel_delayed_work_sync(&rt5682->jack_detect_work);
+	cancel_delayed_work_sync(&rt5682->jd_check_work);
+
 	rt5682_reset(rt5682);
 }