Now, dma_ops is assumed that use the IDMAC.
But if dma_ops is assigned the pdata->dma_ops,
We didn't ensure that callback function is defined.
If anything of callback didn't define, then should be run the PIO mode.
Signed-off-by: Jaehoon Chung <jh80.chung@xxxxxxxxxxx>
Signed-off-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
---
drivers/mmc/host/dw_mmc.c | 3 ++-
1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index f3b0fcd..bab9ead 100644
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -1881,7 +1881,8 @@ static void dw_mci_init_dma(struct dw_mci *host)
if (!host->dma_ops)
goto no_dma;
- if (host->dma_ops->init) {
+ if (host->dma_ops->init && host->dma_ops->start &&
+ host->dma_ops->stop && host->dma_ops->cleanup) {
if (host->dma_ops->init(host)) {
dev_err(&host->dev, "%s: Unable to initialize "
"DMA Controller.\n", __func__);
--
1.7.4.1
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