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dma: sh: Don't use ENODEV for failing slave lookup

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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.gx@renesas.com>
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Cc: stable@vger.kernel.org
Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
This commit is contained in:
Guennadi Liakhovetski 2012-11-28 06:49:47 +00:00 committed by Vinod Koul
parent 944ea4dd38
commit 7c1119bdd6
1 changed files with 1 additions and 1 deletions
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2
drivers/dma/sh/shdma.c
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@ -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;