From: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Date: Mon, 13 Apr 2015 06:00:45 +0000 (+0000)
Subject: ASoC: rsnd: set dmaen->chan = NULL when error case
X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=d1acba2fdebb449bad01e7cf77a9f9730dfaca6e;p=openwrt%2Fstaging%2Fblogic.git

ASoC: rsnd: set dmaen->chan = NULL when error case

rsnd_dmaen_quit() is assuming dmaen->chan is NULL if it failed
to get DMAEngine channel. but, current dmaen->chan might have
error value when error case (this driver is checking it by IS_ERR_OR_NULL())
This patch makes sure dmaen->chan is NULL when error case.
Otherwise, it will contact to unknown address in rsnd_dmaen_quit()

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
---

diff --git a/sound/soc/sh/rcar/dma.c b/sound/soc/sh/rcar/dma.c
index ac3756f6af60..144308f15fb3 100644
--- a/sound/soc/sh/rcar/dma.c
+++ b/sound/soc/sh/rcar/dma.c
@@ -156,6 +156,7 @@ static int rsnd_dmaen_init(struct rsnd_priv *priv, struct rsnd_dma *dma, int id,
 						  (void *)id);
 	}
 	if (IS_ERR_OR_NULL(dmaen->chan)) {
+		dmaen->chan = NULL;
 		dev_err(dev, "can't get dma channel\n");
 		goto rsnd_dma_channel_err;
 	}