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authorTakashi Iwai <tiwai@suse.de>2015-08-19 07:20:14 +0200
committerJiri Slaby <jslaby@suse.cz>2016-11-28 22:22:52 +0100
commitdbb41290b2033840bf962d987c575fb3c8e11807 (patch)
tree1ca5dbb7dfc3a5d73f80f061d30158161fa21709
parent6417d6f2e707a0bcf5b4fd13c0b184d4ba41c4d0 (diff)
ALSA: usb-audio: Fix runtime PM unbalance
commit 9003ebb13f61e8c78a641e0dda7775183ada0625 upstream. The fix for deadlock in PM in commit [1ee23fe07ee8: ALSA: usb-audio: Fix deadlocks at resuming] introduced a new check of in_pm flag. However, the brainless patch author evaluated it in a wrong way (logical AND instead of logical OR), thus usb_autopm_get_interface() is wrongly called at probing, leading to unbalance of runtime PM refcount. This patch fixes it by correcting the logic. Reported-by: Hans Yang <hansy@nvidia.com> Fixes: 1ee23fe07ee8 ('ALSA: usb-audio: Fix deadlocks at resuming') Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jiri Slaby <jslaby@suse.cz>
-rw-r--r--sound/usb/card.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/sound/usb/card.c b/sound/usb/card.c
index bc5795f342a7..96a09226be7d 100644
--- a/sound/usb/card.c
+++ b/sound/usb/card.c
@@ -661,7 +661,7 @@ int snd_usb_autoresume(struct snd_usb_audio *chip)
int err = -ENODEV;
down_read(&chip->shutdown_rwsem);
- if (chip->probing && chip->in_pm)
+ if (chip->probing || chip->in_pm)
err = 0;
else if (!chip->shutdown)
err = usb_autopm_get_interface(chip->pm_intf);