From c855a1a7ff49a43e1e35571d504e89b4c670693d Mon Sep 17 00:00:00 2001 From: Ryan Mallon Date: Tue, 4 Oct 2011 09:55:41 +1100 Subject: [PATCH] ASoC: max98095 codec: Catch driver bugs for biquad channel name Move the biquad channel names to a separate array and iterate over it in max98095_get_bq_channel rather than duplicating the hardcoded channel names. Add an error message if an invalid channel is passed and check the error in the callers. Also added a BUILD_BUG_ON to ensure that the bq_mode_name and controls arrays are the same size. Signed-off-by: Ryan Mallon Signed-off-by: Mark Brown --- sound/soc/codecs/max98095.c | 32 ++++++++++++++++++++++---------- 1 file changed, 22 insertions(+), 10 deletions(-) diff --git a/sound/soc/codecs/max98095.c b/sound/soc/codecs/max98095.c index 8f8e2555cbed..6982f743c891 100644 --- a/sound/soc/codecs/max98095.c +++ b/sound/soc/codecs/max98095.c @@ -1991,12 +1991,19 @@ static void max98095_handle_eq_pdata(struct snd_soc_codec *codec) dev_err(codec->dev, "Failed to add EQ control: %d\n", ret); } -static int max98095_get_bq_channel(const char *name) +static const char *bq_mode_name[] = {"Biquad1 Mode", "Biquad2 Mode"}; + +static int max98095_get_bq_channel(struct snd_soc_codec *codec, + const char *name) { - if (strcmp(name, "Biquad1 Mode") == 0) - return 0; - if (strcmp(name, "Biquad2 Mode") == 0) - return 1; + int i; + + for (i = 0; i < ARRAY_SIZE(bq_mode_name); i++) + if (strcmp(name, bq_mode_name[i]) == 0) + return i; + + /* Shouldn't happen */ + dev_err(codec->dev, "Bad biquad channel name '%s'\n", name); return -EINVAL; } @@ -2006,14 +2013,15 @@ static int max98095_put_bq_enum(struct snd_kcontrol *kcontrol, struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); struct max98095_priv *max98095 = snd_soc_codec_get_drvdata(codec); struct max98095_pdata *pdata = max98095->pdata; - int channel = max98095_get_bq_channel(kcontrol->id.name); + int channel = max98095_get_bq_channel(codec, kcontrol->id.name); struct max98095_cdata *cdata; int sel = ucontrol->value.integer.value[0]; struct max98095_biquad_cfg *coef_set; int fs, best, best_val, i; int regmask, regsave; - BUG_ON(channel > 1); + if (channel < 0) + return channel; if (!pdata || !max98095->bq_textcnt) return 0; @@ -2065,9 +2073,12 @@ static int max98095_get_bq_enum(struct snd_kcontrol *kcontrol, { struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); struct max98095_priv *max98095 = snd_soc_codec_get_drvdata(codec); - int channel = max98095_get_bq_channel(kcontrol->id.name); + int channel = max98095_get_bq_channel(codec, kcontrol->id.name); struct max98095_cdata *cdata; + if (channel < 0) + return channel; + cdata = &max98095->dai[channel]; ucontrol->value.enumerated.item[0] = cdata->bq_sel; @@ -2085,15 +2096,16 @@ static void max98095_handle_bq_pdata(struct snd_soc_codec *codec) int ret; struct snd_kcontrol_new controls[] = { - SOC_ENUM_EXT("Biquad1 Mode", + SOC_ENUM_EXT((char *)bq_mode_name[0], max98095->bq_enum, max98095_get_bq_enum, max98095_put_bq_enum), - SOC_ENUM_EXT("Biquad2 Mode", + SOC_ENUM_EXT((char *)bq_mode_name[1], max98095->bq_enum, max98095_get_bq_enum, max98095_put_bq_enum), }; + BUILD_BUG_ON(ARRAY_SIZE(controls) != ARRAY_SIZE(bq_mode_name)); cfg = pdata->bq_cfg; cfgcnt = pdata->bq_cfgcnt;