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authorTakashi Iwai <tiwai@suse.de>2015-08-19 08:20:14 +0300
committerTakashi Iwai <tiwai@suse.de>2015-08-19 15:57:51 +0300
commit9003ebb13f61e8c78a641e0dda7775183ada0625 (patch)
tree96b0d4793235149b47aad7a34dc853cc39e57d67 /sound/usb/card.c
parent7ccb0a9917a511de1d5f92980f26885484d9a914 (diff)
downloadlinux-9003ebb13f61e8c78a641e0dda7775183ada0625.tar.xz
ALSA: usb-audio: Fix runtime PM unbalance
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') Cc: <stable@vger.kernel.org> [v3.15+] Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/usb/card.c')
-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 1fab9778807a..0450593980fd 100644
--- a/sound/usb/card.c
+++ b/sound/usb/card.c
@@ -638,7 +638,7 @@ 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);