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| author | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2012-06-22 12:40:52 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2012-06-23 12:11:32 +0100 |
| commit | 9dfdd5abcf2b350d4fdb207c0dff3194e2fd73db (patch) | |
| tree | c411f3c7a5c0b2dcb507b3d6882ad012b395ae56 | |
| parent | 62d4a4b99dfd647ef88b8434334eaa7497602857 (diff) | |
| download | linux-3.10-9dfdd5abcf2b350d4fdb207c0dff3194e2fd73db.tar.gz linux-3.10-9dfdd5abcf2b350d4fdb207c0dff3194e2fd73db.tar.bz2 linux-3.10-9dfdd5abcf2b350d4fdb207c0dff3194e2fd73db.zip | |
ASoC: io: Don't dereference regmap if we failed to get one
Avoids a crash in invalid configurations.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@ti.com>
| -rw-r--r-- | sound/soc/soc-io.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/sound/soc/soc-io.c b/sound/soc/soc-io.c index 44d0174b4d9..29183ef2b93 100644 --- a/sound/soc/soc-io.c +++ b/sound/soc/soc-io.c @@ -145,10 +145,13 @@ int snd_soc_codec_set_cache_io(struct snd_soc_codec *codec, if (!codec->control_data) codec->control_data = dev_get_regmap(codec->dev, NULL); - ret = regmap_get_val_bytes(codec->control_data); - /* Errors are legitimate for non-integer byte multiples */ - if (ret > 0) - codec->val_bytes = ret; + if (codec->control_data) { + ret = regmap_get_val_bytes(codec->control_data); + /* Errors are legitimate for non-integer byte + * multiples */ + if (ret > 0) + codec->val_bytes = ret; + } break; default: |