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 <[email protected]> Signed-off-by: Guennadi Liakhovetski <[email protected]> --- Hi Vinod Could you please push this patch to Linus for 3.7 ASAP? I think, it should also go to "stable." Thanks Guennadi drivers/dma/sh/shdma.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/drivers/dma/sh/shdma.c b/drivers/dma/sh/shdma.c index f41bcc5..910d878 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; -- 1.7.2.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
