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authorCharles Keepax <ckeepax@opensource.wolfsonmicro.com>2014-09-09 16:51:49 +0100
committerMark Brown <broonie@linaro.org>2014-09-09 20:59:06 +0100
commit133c2681c4a0c1b589d138c2fdd0f131bdce20ed (patch)
tree90150b0ac1c1a399b4b1d62ccf90c014d7974bad /sound
parent7d1311b93e58ed55f3a31cc8f94c4b8fe988a2b9 (diff)
downloadlinux-133c2681c4a0c1b589d138c2fdd0f131bdce20ed.tar.gz
ASoC: samsung-i2s: Check secondary DAI exists before referencing
In a couple of places the driver is missing a check to ensure there is a secondary DAI before it de-references the pointer to it, causing a null pointer de-reference. This patch adds a check to avoid this. Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com> Acked-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Signed-off-by: Mark Brown <broonie@linaro.org> Cc: stable@vger.kernel.org
Diffstat (limited to 'sound')
-rw-r--r--sound/soc/samsung/i2s.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/sound/soc/samsung/i2s.c b/sound/soc/samsung/i2s.c
index 03eec22f0f46..9d513473b300 100644
--- a/sound/soc/samsung/i2s.c
+++ b/sound/soc/samsung/i2s.c
@@ -462,7 +462,7 @@ static int i2s_set_sysclk(struct snd_soc_dai *dai,
if (dir == SND_SOC_CLOCK_IN)
rfs = 0;
- if ((rfs && other->rfs && (other->rfs != rfs)) ||
+ if ((rfs && other && other->rfs && (other->rfs != rfs)) ||
(any_active(i2s) &&
(((dir == SND_SOC_CLOCK_IN)
&& !(mod & MOD_CDCLKCON)) ||
@@ -762,7 +762,8 @@ static void i2s_shutdown(struct snd_pcm_substream *substream,
} else {
u32 mod = readl(i2s->addr + I2SMOD);
i2s->cdclk_out = !(mod & MOD_CDCLKCON);
- other->cdclk_out = i2s->cdclk_out;
+ if (other)
+ other->cdclk_out = i2s->cdclk_out;
}
/* Reset any constraint on RFS and BFS */
i2s->rfs = 0;