linux-kernel - [PATCH RFC 05/15] ASoC: qcom: ipq806x: add error in dma allocation.

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Message-Id: <1454347723-10550-1-git-send-email-srinivas.kandagatla@linaro.org>
Date:	Mon,  1 Feb 2016 17:28:43 +0000
From:	Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
To:	Patrick Lai <plai@...eaurora.org>, alsa-devel@...a-project.org
Cc:	Banajit Goswami <bgoswami@...eaurora.org>,
	Liam Girdwood <lgirdwood@...il.com>,
	Mark Brown <broonie@...nel.org>,
	Jaroslav Kysela <perex@...ex.cz>,
	Takashi Iwai <tiwai@...e.com>, linux-kernel@...r.kernel.org,
	linux-arm-msm@...r.kernel.org,
	Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Subject: [PATCH RFC 05/15] ASoC: qcom: ipq806x: add error in dma allocation.

ipq806x is only ever tested for playback so return error in dma allocation
if the stream direction is capture.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
---
 sound/soc/qcom/lpass-ipq806x.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/sound/soc/qcom/lpass-ipq806x.c b/sound/soc/qcom/lpass-ipq806x.c
index 119048c..8bdcdcb 100644
--- a/sound/soc/qcom/lpass-ipq806x.c
+++ b/sound/soc/qcom/lpass-ipq806x.c
@@ -65,7 +65,10 @@ static struct snd_soc_dai_driver ipq806x_lpass_cpu_dai_driver = {
 
 static int ipq806x_lpass_alloc_dma_channel(struct lpass_data *drvdata, int dir)
 {
-	return IPQ806X_LPAIF_RDMA_CHAN_MI2S;
+	if (dir == SNDRV_PCM_STREAM_PLAYBACK)
+		return IPQ806X_LPAIF_RDMA_CHAN_MI2S;
+	else	/* Capture not supported */
+		return -EINVAL;
 }
 
 static int ipq806x_lpass_free_dma_channel(struct lpass_data *drvdata, int chan)
-- 
1.9.1