This is a note to let you know that I've just added the patch titled
dma: sh: Don't use ENODEV for failing slave lookup
to the 3.8-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
dma-sh-don-t-use-enodev-for-failing-slave-lookup.patch
and it can be found in the queue-3.8 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 7c1119bdd650fa58dad8157bc75c5fcf6ed97843 Mon Sep 17 00:00:00 2001
From: Guennadi Liakhovetski <g.liakhovetski@xxxxxx>
Date: Wed, 28 Nov 2012 06:49:47 +0000
Subject: dma: sh: Don't use ENODEV for failing slave lookup
From: Guennadi Liakhovetski <g.liakhovetski@xxxxxx>
commit 7c1119bdd650fa58dad8157bc75c5fcf6ed97843 upstream.
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@xxxxxxxxxxx>
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@xxxxxx>
Signed-off-by: Vinod Koul <vinod.koul@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/dma/sh/shdma.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/dma/sh/shdma.c
+++ b/drivers/dma/sh/shdma.c
@@ -326,7 +326,7 @@ static int sh_dmae_set_slave(struct shdm
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;
Patches currently in stable-queue which might be from g.liakhovetski@xxxxxx are
queue-3.8/dma-sh-don-t-use-enodev-for-failing-slave-lookup.patch
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