diff options
Diffstat (limited to 'drivers/mmc/host/tmio_mmc_dma.c')
| -rw-r--r-- | drivers/mmc/host/tmio_mmc_dma.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/mmc/host/tmio_mmc_dma.c b/drivers/mmc/host/tmio_mmc_dma.c index 25f1ad6cbe0..86f259cdfcb 100644 --- a/drivers/mmc/host/tmio_mmc_dma.c +++ b/drivers/mmc/host/tmio_mmc_dma.c @@ -11,6 +11,7 @@ */ #include <linux/device.h> +#include <linux/dma-mapping.h> #include <linux/dmaengine.h> #include <linux/mfd/tmio.h> #include <linux/mmc/host.h> @@ -22,11 +23,14 @@ #define TMIO_MMC_MIN_DMA_LEN 8 -static void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable) +void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable) { + if (!host->chan_tx || !host->chan_rx) + return; + #if defined(CONFIG_SUPERH) || defined(CONFIG_ARCH_SHMOBILE) /* Switch DMA mode on or off - SuperH specific? */ - writew(enable ? 2 : 0, host->ctl + (0xd8 << host->bus_shift)); + sd_ctrl_write16(host, CTL_DMA_ENABLE, enable ? 2 : 0); #endif } |