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ALSA: firewire-speakers: fix locking

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There is a lock inversion between fwspk->mutex and pcm->open_mutex
reported by lockdep when fwspk_hw_free is called.

Fixed by copying the fix from the same former issue in the isight
sound driver (commit f3f7c1837f
"ALSA: isight: fix locking").

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Stefan Richter 2011-08-27 16:45:28 +02:00 committed by Takashi Iwai
parent bb690c9e27
commit a0978e8039
1 changed files with 3 additions and 2 deletions
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5
sound/firewire/speakers.c
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@ -778,9 +778,10 @@ static int __devexit fwspk_remove(struct device *dev)
{
struct fwspk *fwspk = dev_get_drvdata(dev);
mutex_lock(&fwspk->mutex);
amdtp_out_stream_pcm_abort(&fwspk->stream);
snd_card_disconnect(fwspk->card);
mutex_lock(&fwspk->mutex);
fwspk_stop_stream(fwspk);
mutex_unlock(&fwspk->mutex);
@ -796,8 +797,8 @@ static void fwspk_bus_reset(struct fw_unit *unit)
fcp_bus_reset(fwspk->unit);
if (cmp_connection_update(&fwspk->connection) < 0) {
mutex_lock(&fwspk->mutex);
amdtp_out_stream_pcm_abort(&fwspk->stream);
mutex_lock(&fwspk->mutex);
fwspk_stop_stream(fwspk);
mutex_unlock(&fwspk->mutex);
return;