From b5a8fe439ab343631d905a51438db3de54ba94df Mon Sep 17 00:00:00 2001
From: Mark Brown <broonie@opensource.wolfsonmicro.com>
Date: Sun, 20 Jan 2013 21:42:22 +0900
Subject: 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>

diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index e0e8ce0..02d826e 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -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;
@@ -3137,8 +3136,7 @@ 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);
+	kfree(data);
 
 	return ret;
 }
-- 
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