Messages in this thread Patch in this message | | | Date | Fri, 16 Dec 2011 11:45:29 -0800 | From | Greg KH <> | Subject | [32/53] mmc: mxcmmc: fix falling back to PIO |
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3.1-stable review patch. If anyone has any objections, please let me know.
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From: Sascha Hauer <s.hauer@pengutronix.de>
commit e58f516ff4730c4047c3f104b061f7a03e9a263c upstream.
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> Signed-off-by: Chris Ball <cjb@laptop.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
--- drivers/mmc/host/mxcmmc.c | 1 + 1 file changed, 1 insertion(+)
--- a/drivers/mmc/host/mxcmmc.c +++ b/drivers/mmc/host/mxcmmc.c @@ -731,6 +731,7 @@ static void mxcmci_set_ios(struct mmc_ho "failed to config DMA channel. Falling back to PIO\n"); dma_release_channel(host->dma); host->do_dma = 0; + host->dma = NULL; } }
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