linux-kernel - [PATCH] ASoC: fsl_sai: Fix incorrect condition check in trigger()

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Date:	Fri, 11 Apr 2014 22:10:00 +0800
From:	Nicolin Chen <Guangyu.Chen@...escale.com>
To:	<broonie@...nel.org>
CC:	<linux-kernel@...r.kernel.org>, <linuxppc-dev@...ts.ozlabs.org>,
	<alsa-devel@...a-project.org>, <timur@...i.org>,
	<Li.Xiubo@...escale.com>
Subject: [PATCH] ASoC: fsl_sai: Fix incorrect condition check in trigger()

Patch ASoC: fsl_sai: Fix buggy configurations in trigger() doesn't entirely
fix the condition: FRDE of the current substream direction is being cleared
while the code is still using the non-updated one.

Thus this patch fixes this issue by checking the opposite one's FRDE alone
since the current one's is absolutely disabled.

Signed-off-by: Nicolin Chen <Guangyu.Chen@...escale.com>
---
 sound/soc/fsl/fsl_sai.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/sound/soc/fsl/fsl_sai.c b/sound/soc/fsl/fsl_sai.c
index 9858d42..1716a41 100644
--- a/sound/soc/fsl/fsl_sai.c
+++ b/sound/soc/fsl/fsl_sai.c
@@ -343,7 +343,8 @@ static int fsl_sai_trigger(struct snd_pcm_substream *substream, int cmd,
 		regmap_update_bits(sai->regmap, FSL_SAI_xCSR(tx),
 				   FSL_SAI_CSR_xIE_MASK, 0);
 
-		if (!(tcsr & FSL_SAI_CSR_FRDE || rcsr & FSL_SAI_CSR_FRDE)) {
+		/* Check if the opposite FRDE is also disabled */
+		if (!(tx ? rcsr & FSL_SAI_CSR_FRDE : tcsr & FSL_SAI_CSR_FRDE)) {
 			regmap_update_bits(sai->regmap, FSL_SAI_TCSR,
 					   FSL_SAI_CSR_TERE, 0);
 			regmap_update_bits(sai->regmap, FSL_SAI_RCSR,
-- 
1.8.4


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