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ASoC: core: Ensure SND_SOC_BYTES writes are from DMA safe memory 

With some buses the transfers may DMAed, especially for larger blocks.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Mark Brown 2013-01-20 21:42:22 +09:00
parent 5d163336a7
commit b5a8fe439a
1 changed files with 5 additions and 7 deletions
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10
sound/soc/soc-core.c
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@ -3097,9 +3097,12 @@ int snd_soc_bytes_put(struct snd_kcontrol *kcontrol,
if (!codec->using_regmap)
return -EINVAL;
data = ucontrol->value.bytes.data;
len = params->num_regs * codec->val_bytes;
data = kmemdup(ucontrol->value.bytes.data, len, GFP_KERNEL | GFP_DMA);
if (!data)
return -ENOMEM;
/*
* If we've got a mask then we need to preserve the register
* bits. We shouldn't modify the incoming data so take a
@ -3112,10 +3115,6 @@ int snd_soc_bytes_put(struct snd_kcontrol *kcontrol,
val &= params->mask;
data = kmemdup(data, len, GFP_KERNEL);
if (!data)
return -ENOMEM;
switch (codec->val_bytes) {
case 1:
((u8 *)data)[0] &= ~params->mask;
@ -3137,7 +3136,6 @@ int snd_soc_bytes_put(struct snd_kcontrol *kcontrol,
ret = regmap_raw_write(codec->control_data, params->base,
data, len);
if (params->mask)
kfree(data);
return ret;