Commit e58f516f authored Nov 11, 2011 by Sascha Hauer Committed by Chris Ball Dec 10, 2011

mmc: mxcmmc: fix falling back to PIO



When we can't configure the dma channel we want to fall
back to PIO. We do this by setting host->do_dma to zero.
This does not work as do_dma is used to see whether dma
can be used for the current transfer. Instead, we have
to set host->dma to NULL.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Cc: <stable@kernel.org>
Signed-off-by: Chris Ball <cjb@laptop.org>

parent 053bf34f

drivers/mmc/host/mxcmmc.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -732,6 +732,7 @@ static void mxcmci_set_ios(struct mmc_host mmc, struct mmc_ios ios)
		"failed to config DMA channel. Falling back to PIO\n");
		dma_release_channel(host->dma);
		host->do_dma = 0;
		host->dma = NULL;
		}
		}