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| author | Takashi Iwai <tiwai@suse.de> | 2020-02-13 07:03:49 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2020-02-13 16:30:22 +0100 |
| commit | 0fbb027b44e79700da80e4b8bd1c1914d4796af6 (patch) | |
| tree | 218dfdd93e79af7f7df2007ab99cf7106c6d6a3f /sound/core | |
| parent | 9f35a31283775e6f6af73fb2c95c686a4c0acac7 (diff) | |
| download | linux-0fbb027b44e79700da80e4b8bd1c1914d4796af6.tar.bz2 | |
ALSA: pcm: Fix double hw_free calls
The commit 66f2d19f8116 ("ALSA: pcm: Fix memory leak at closing a
stream without hw_free") tried to fix the regression wrt the missing
hw_free call at closing without SNDRV_PCM_IOCTL_HW_FREE ioctl.
However, the code change dropped mistakenly the state check, resulting
in calling hw_free twice when SNDRV_PCM_IOCTL_HW_FRE got called
beforehand. For most drivers, this is almost harmless, but the
drivers like SOF show another regression now.
This patch adds the state condition check before calling do_hw_free()
at releasing the stream for avoiding the double hw_free calls.
Fixes: 66f2d19f8116 ("ALSA: pcm: Fix memory leak at closing a stream without hw_free")
Reported-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reported-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Tested-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/s5hd0ajyprg.wl-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/core')
| -rw-r--r-- | sound/core/pcm_native.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c index 336406bcb59e..d5443eeb8b63 100644 --- a/sound/core/pcm_native.c +++ b/sound/core/pcm_native.c @@ -2594,7 +2594,8 @@ void snd_pcm_release_substream(struct snd_pcm_substream *substream) snd_pcm_drop(substream); if (substream->hw_opened) { - do_hw_free(substream); + if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN) + do_hw_free(substream); substream->ops->close(substream); substream->hw_opened = 0; } |