linux-kernel - [PATCH 3.19.y-ckt 079/146] ASoC: uda1380: Avoid accessing i2c bus when codec is disabled

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Message-Id: <1434579851-1719-80-git-send-email-kamal@canonical.com>
Date:	Wed, 17 Jun 2015 15:23:04 -0700
From:	Kamal Mostafa <kamal@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Vasily Khoruzhick <anarsoul@...il.com>,
	Mark Brown <broonie@...nel.org>,
	Kamal Mostafa <kamal@...onical.com>
Subject: [PATCH 3.19.y-ckt 079/146] ASoC: uda1380: Avoid accessing i2c bus when codec is disabled

3.19.8-ckt2 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Vasily Khoruzhick <anarsoul@...il.com>

commit 810e4425c224af6be67dff68c8832af1b5a11f89 upstream.

set_dai_fmt_both() callback is called from snd_soc_runtime_set_dai_fmt()
which is called from snd_soc_register_card(), but at this time codec
is not powered on yet. Replace direct i2c write with regcache write.

Fixes: 5f0acedddf533c (ASoC: rx1950_uda1380: Use static DAI format setup)
Fixes: 5cc10b9b77c234 (ASoC: h1940_uda1380: Use static DAI format setup)
Signed-off-by: Vasily Khoruzhick <anarsoul@...il.com>
Signed-off-by: Mark Brown <broonie@...nel.org>
Signed-off-by: Kamal Mostafa <kamal@...onical.com>
---
 sound/soc/codecs/uda1380.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/soc/codecs/uda1380.c b/sound/soc/codecs/uda1380.c
index dc7778b..c3c33bd 100644
--- a/sound/soc/codecs/uda1380.c
+++ b/sound/soc/codecs/uda1380.c
@@ -437,7 +437,7 @@ static int uda1380_set_dai_fmt_both(struct snd_soc_dai *codec_dai,
 	if ((fmt & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS)
 		return -EINVAL;
 
-	uda1380_write(codec, UDA1380_IFACE, iface);
+	uda1380_write_reg_cache(codec, UDA1380_IFACE, iface);
 
 	return 0;
 }
-- 
1.9.1

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