Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [ 140/150] dma: sh: Dont use ENODEV for failing slave lookup | Date | Tue, 26 Feb 2013 15:56:37 -0800 |
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3.8-stable review patch. If anyone has any objections, please let me know.
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From: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
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@renesas.com> Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- 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;
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