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| author | Takashi Iwai <tiwai@suse.de> | 2015-08-19 07:20:14 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2015-08-19 14:57:51 +0200 |
| commit | 9003ebb13f61e8c78a641e0dda7775183ada0625 (patch) | |
| tree | 96b0d4793235149b47aad7a34dc853cc39e57d67 /sound/usb | |
| parent | 7ccb0a9917a511de1d5f92980f26885484d9a914 (diff) | |
| download | linux-9003ebb13f61e8c78a641e0dda7775183ada0625.tar.gz linux-9003ebb13f61e8c78a641e0dda7775183ada0625.tar.bz2 linux-9003ebb13f61e8c78a641e0dda7775183ada0625.zip | |
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')
| -rw-r--r-- | sound/usb/card.c | 2 |
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); |