commit: 7c1119bdd650fa58dad8157bc75c5fcf6ed97843
From: Guennadi Liakhovetski <g.liakhovet...@gmx.de>
Date: Wed, 28 Nov 2012 06:49:47 +0000
Subject: dma: sh: Don't use ENODEV for failing slave lookup
If dmaengine driver's .device_alloc_chan_resources() method returns -ENODEV,
dma_request_channel() will decide, that the driver has been removed and will
remove the device from its list. To prevent this use ENXIO if a slave lookup
fails.
Reported-by: Kuninori Morimoto <kuninori.morimoto...@renesas.com>
Signed-off-by: Guennadi Liakhovetski <g.liakhovet...@gmx.de>
Cc: stable@vger.kernel.org
Signed-off-by: Vinod Koul <vinod.k...@linux.intel.com>
---
drivers/dma/sh/shdma.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/dma/sh/shdma.c b/drivers/dma/sh/shdma.c
index 8201bb4..62eff48 100644
--- a/drivers/dma/sh/shdma.c
+++ b/drivers/dma/sh/shdma.c
@@ -326,7 +326,7 @@ static int sh_dmae_set_slave(struct shdma_chan *schan,
shdma_chan);
const struct sh_dmae_slave_config *cfg = dmae_find_slave(sh_chan,
slave_id);
if (!cfg)
- return -ENODEV;
+ return -ENXIO;
if (!try)
sh_chan->config = cfg;
--
1.7.10.4
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