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authorDimitris Papastamos <dp@opensource.wolfsonmicro.com>2010-09-21 15:03:26 +0100
committerMark Brown <broonie@opensource.wolfsonmicro.com>2010-09-22 12:01:05 +0100
commitd47372e852391d0c6553dfbc7c4c56b89b527e13 (patch)
tree39319d653d6d29443de9392f89c30f6d1be27e36 /sound
parentcbfa5184cc5f58627f08c7fad225424f565b439d (diff)
ASoC: Fix soc-cache buffer overflow bug
Make sure we stay within the cache boundaries when updating the register cache. Signed-off-by: Dimitris Papastamos <dp@opensource.wolfsonmicro.com> Acked-by: Liam Girdwood <lrg@slimlogic.co.uk> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'sound')
-rw-r--r--sound/soc/soc-cache.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/sound/soc/soc-cache.c b/sound/soc/soc-cache.c
index adbc68ce9050..15d2779074ef 100644
--- a/sound/soc/soc-cache.c
+++ b/sound/soc/soc-cache.c
@@ -203,8 +203,9 @@ static int snd_soc_8_16_write(struct snd_soc_codec *codec, unsigned int reg,
data[1] = (value >> 8) & 0xff;
data[2] = value & 0xff;
- if (!snd_soc_codec_volatile_register(codec, reg))
- reg_cache[reg] = value;
+ if (!snd_soc_codec_volatile_register(codec, reg)
+ && reg < codec->driver->reg_cache_size)
+ reg_cache[reg] = value;
if (codec->cache_only) {
codec->cache_sync = 1;

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