| Message ID | 20210310112809.9215-2-tiwai@suse.de (mailing list archive) |
|---|---|
| State | Accepted |
| Commit | 13661fc48461282e43fe8f76bf5bf449b3d40687 |
| Headers | show |
| Series | ALSA: hda: Fix potential bad accesses at suspend/resume | expand |
diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c index 5b492c3f816c..5eea130dcf0a 100644 --- a/sound/pci/hda/hda_intel.c +++ b/sound/pci/hda/hda_intel.c @@ -1026,6 +1026,8 @@ static int azx_prepare(struct device *dev) chip = card->private_data; chip->pm_prepared = 1; + flush_work(&azx_bus(chip)->unsol_work); + /* HDA controller always requires different WAKEEN for runtime suspend * and system suspend, so don't use direct-complete here. */
The HD-audio controller driver processes the unsolicited events via its work asynchronously, and this might be pending when the system goes to suspend. When a lengthy event handling like ELD byte reads is running, this might trigger unexpected accesses among suspend/resume procedure, typically seen with Nvidia driver that still requires the handling via unsolicited event verbs for ELD updates. This patch adds the flush of unsol_work to assure that pending events are processed before going into suspend. Buglink: https://bugzilla.suse.com/show_bug.cgi?id=1182377 Reported-and-tested-by: Abhishek Sahu <abhsahu@nvidia.com> Cc: <stable@vger.kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de> --- sound/pci/hda/hda_intel.c | 2 ++ 1 file changed, 2 insertions(+)