This patch has been added to the 4.1 stable tree. If you have any
objections, please let us know.
===============
[ Upstream commit ab58d8cc870ef3f0771c197700441936898d1f1d ]
register_vga_switcheroo() sets the PM ops from the hda structure which
is freed later in azx_free. Make sure that these ops are cleared.
Caught by KASAN, initially noticed due to a general protection fault.
Fixes: 246efa4a072f ("snd/hda: add runtime suspend/resume on optimus support (v4)")
Signed-off-by: Peter Wu <peter@xxxxxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx>
---
sound/pci/hda/hda_intel.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index 9e113bc..6a37c9b 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -1123,8 +1123,10 @@ static int azx_free(struct azx *chip)
if (use_vga_switcheroo(hda)) {
if (chip->disabled && chip->bus)
snd_hda_unlock_devices(chip->bus);
- if (hda->vga_switcheroo_registered)
+ if (hda->vga_switcheroo_registered) {
vga_switcheroo_unregister_client(chip->pci);
+ vga_switcheroo_fini_domain_pm_ops(chip->card->dev);
+ }
}
if (chip->initialized) {
--
2.7.4
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