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| author | Clemens Ladisch <clemens@ladisch.de> | 2011-05-11 11:07:09 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2011-05-11 14:53:09 +0200 |
| commit | f3f7c1837f6bcae3601fc535b339426868bf1549 (patch) | |
| tree | 1baa013c8219969e65ee22d42ed4bb2293763195 | |
| parent | 3cabffd72c303c3b5bbbbe88c95b49043898d1f3 (diff) | |
| download | linux-f3f7c1837f6bcae3601fc535b339426868bf1549.tar.gz linux-f3f7c1837f6bcae3601fc535b339426868bf1549.tar.bz2 linux-f3f7c1837f6bcae3601fc535b339426868bf1549.zip | |
ALSA: isight: fix locking
Lockdep complains about conflicts between isight->mutex,
ALSA's register_mutex, mm->mmap_sem, and pcm->open_mutex.
This can be fixed by moving the calls to isight_pcm_abort(),
snd_card_disconnect(), and fw_iso_resources_update() out of
isight->mutex. These functions are designed to be called
asynchronously; the mutex needs to protect only the device
streaming state modified by isight_start/stop_streaming().
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Reported-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
| -rw-r--r-- | sound/firewire/isight.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/sound/firewire/isight.c b/sound/firewire/isight.c index 96267437d373..86ee16ca365e 100644 --- a/sound/firewire/isight.c +++ b/sound/firewire/isight.c @@ -692,9 +692,11 @@ static int isight_remove(struct device *dev) { struct isight *isight = dev_get_drvdata(dev); - mutex_lock(&isight->mutex); isight_pcm_abort(isight); + snd_card_disconnect(isight->card); + + mutex_lock(&isight->mutex); isight_stop_streaming(isight); mutex_unlock(&isight->mutex); @@ -707,12 +709,13 @@ static void isight_bus_reset(struct fw_unit *unit) { struct isight *isight = dev_get_drvdata(&unit->device); - mutex_lock(&isight->mutex); if (fw_iso_resources_update(&isight->resources) < 0) { isight_pcm_abort(isight); + + mutex_lock(&isight->mutex); isight_stop_streaming(isight); + mutex_unlock(&isight->mutex); } - mutex_unlock(&isight->mutex); } static const struct ieee1394_device_id isight_id_table[] = { |