diff options
| author | Ivan Orlov <ivan.orlov0322@gmail.com> | 2023-12-06 22:32:11 +0000 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2023-12-07 08:33:06 +0100 |
| commit | eb99b1b72a424a79f56c972e0fd7ad01fe93a008 (patch) | |
| tree | f20e302ce6bb9de96d03a885c2e71e2b6a30ed73 /sound | |
| parent | 8804fa04a492f4176ea407390052292912227820 (diff) | |
ALSA: pcmtest: stop timer before buffer is released
Stop timer in the 'trigger' and 'sync_stop' callbacks since we want
the timer to be stopped before the DMA buffer is released. Otherwise,
it could trigger a kernel panic in some circumstances, for instance
when the DMA buffer is already released but the timer callback is
still running.
Signed-off-by: Ivan Orlov <ivan.orlov0322@gmail.com>
Link: https://lore.kernel.org/r/20231206223211.12761-1-ivan.orlov0322@gmail.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/drivers/pcmtest.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/sound/drivers/pcmtest.c b/sound/drivers/pcmtest.c index b59b78a09224..b8bff5522bce 100644 --- a/sound/drivers/pcmtest.c +++ b/sound/drivers/pcmtest.c @@ -397,7 +397,6 @@ static int snd_pcmtst_pcm_close(struct snd_pcm_substream *substream) struct pcmtst_buf_iter *v_iter = substream->runtime->private_data; timer_shutdown_sync(&v_iter->timer_instance); - v_iter->substream = NULL; playback_capture_test = !v_iter->is_buf_corrupted; kfree(v_iter); return 0; @@ -435,6 +434,7 @@ static int snd_pcmtst_pcm_trigger(struct snd_pcm_substream *substream, int cmd) case SNDRV_PCM_TRIGGER_PAUSE_PUSH: // We can't call timer_shutdown_sync here, as it is forbidden to sleep here v_iter->suspend = true; + timer_delete(&v_iter->timer_instance); break; } @@ -512,12 +512,22 @@ static int snd_pcmtst_ioctl(struct snd_pcm_substream *substream, unsigned int cm return snd_pcm_lib_ioctl(substream, cmd, arg); } +static int snd_pcmtst_sync_stop(struct snd_pcm_substream *substream) +{ + struct pcmtst_buf_iter *v_iter = substream->runtime->private_data; + + timer_delete_sync(&v_iter->timer_instance); + + return 0; +} + static const struct snd_pcm_ops snd_pcmtst_playback_ops = { .open = snd_pcmtst_pcm_open, .close = snd_pcmtst_pcm_close, .trigger = snd_pcmtst_pcm_trigger, .hw_params = snd_pcmtst_pcm_hw_params, .ioctl = snd_pcmtst_ioctl, + .sync_stop = snd_pcmtst_sync_stop, .hw_free = snd_pcmtst_pcm_hw_free, .prepare = snd_pcmtst_pcm_prepare, .pointer = snd_pcmtst_pcm_pointer, @@ -530,6 +540,7 @@ static const struct snd_pcm_ops snd_pcmtst_capture_ops = { .hw_params = snd_pcmtst_pcm_hw_params, .hw_free = snd_pcmtst_pcm_hw_free, .ioctl = snd_pcmtst_ioctl, + .sync_stop = snd_pcmtst_sync_stop, .prepare = snd_pcmtst_pcm_prepare, .pointer = snd_pcmtst_pcm_pointer, }; |