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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
This commit is contained in:
Charles Keepax 2014-09-09 16:51:49 +01:00 committed by Mark Brown
parent 7d1311b93e
commit 133c2681c4
1 changed files with 3 additions and 2 deletions
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5
sound/soc/samsung/i2s.c
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@ -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;