From 9dfdd5abcf2b350d4fdb207c0dff3194e2fd73db Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Fri, 22 Jun 2012 12:40:52 +0100 Subject: ASoC: io: Don't dereference regmap if we failed to get one Avoids a crash in invalid configurations. Signed-off-by: Mark Brown Acked-by: Liam Girdwood --- sound/soc/soc-io.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) (limited to 'sound/soc/soc-io.c') diff --git a/sound/soc/soc-io.c b/sound/soc/soc-io.c index 44d0174b4d97..29183ef2b93d 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: -- cgit v1.2.3