[PATCH 01/72] ASoC: imx-ssi: Fix occasional AC97 reset failure

From: Luis Henriques
Date: Thu Apr 18 2013 - 05:41:37 EST


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

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

From: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>

commit b6e51600f4e983e757b1b6942becaa1ae7d82e67 upstream.

Signed-off-by: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
Signed-off-by: Markus Pargmann <mpa@xxxxxxxxxxxxxx>
Signed-off-by: Mark Brown <broonie@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Luis Henriques <luis.henriques@xxxxxxxxxxxxx>
---
sound/soc/fsl/imx-ssi.c | 5 +++++
1 file changed, 5 insertions(+)

diff --git a/sound/soc/fsl/imx-ssi.c b/sound/soc/fsl/imx-ssi.c
index 28dd76c..83300fb 100644
--- a/sound/soc/fsl/imx-ssi.c
+++ b/sound/soc/fsl/imx-ssi.c
@@ -497,6 +497,8 @@ static void imx_ssi_ac97_reset(struct snd_ac97 *ac97)

if (imx_ssi->ac97_reset)
imx_ssi->ac97_reset(ac97);
+ /* First read sometimes fails, do a dummy read */
+ imx_ssi_ac97_read(ac97, 0);
}

static void imx_ssi_ac97_warm_reset(struct snd_ac97 *ac97)
@@ -505,6 +507,9 @@ static void imx_ssi_ac97_warm_reset(struct snd_ac97 *ac97)

if (imx_ssi->ac97_warm_reset)
imx_ssi->ac97_warm_reset(ac97);
+
+ /* First read sometimes fails, do a dummy read */
+ imx_ssi_ac97_read(ac97, 0);
}

struct snd_ac97_bus_ops soc_ac97_ops = {
--
1.8.1.2

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