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authorBrian Norris <briannorris@chromium.org>2017-03-09 00:18:54 +0100
committerMark Brown <broonie@kernel.org>2017-03-09 12:34:17 +0100
commitd6c098a1db468b7fd4635e831f276851dfd8852c (patch)
treeaf3ae09b6c0b16bb6bfcaeff38b3d4799cbe5629 /sound
parentLinux 4.11-rc1 (diff)
downloadlinux-d6c098a1db468b7fd4635e831f276851dfd8852c.tar.xz
linux-d6c098a1db468b7fd4635e831f276851dfd8852c.zip
ASoC: don't dereference NULL pcm_{new,free}
Not all platform drivers have pcm_{new,free} callbacks. Seen with a "snd-soc-dummy" codec from sound/soc/rockchip/rk3399_gru_sound.c. Fixes: 99b04f4c4051 ("ASoC: add Component level pcm_new/pcm_free") Signed-off-by: Brian Norris <briannorris@chromium.org> Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound')
-rw-r--r--sound/soc/soc-core.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index 6dca408faae3..2722bb0c5573 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -3326,7 +3326,10 @@ static int snd_soc_platform_drv_pcm_new(struct snd_soc_pcm_runtime *rtd)
{
struct snd_soc_platform *platform = rtd->platform;
- return platform->driver->pcm_new(rtd);
+ if (platform->driver->pcm_new)
+ return platform->driver->pcm_new(rtd);
+ else
+ return 0;
}
static void snd_soc_platform_drv_pcm_free(struct snd_pcm *pcm)
@@ -3334,7 +3337,8 @@ static void snd_soc_platform_drv_pcm_free(struct snd_pcm *pcm)
struct snd_soc_pcm_runtime *rtd = pcm->private_data;
struct snd_soc_platform *platform = rtd->platform;
- platform->driver->pcm_free(pcm);
+ if (platform->driver->pcm_free)
+ platform->driver->pcm_free(pcm);
}
/**