tree 4b258ea786edda6cc9903319459143cc10d50775
parent b89152824f993a9572b47eb31f4579feadeac34c
author Jaehoon Chung <jh80.chung@samsung.com> 1334731351 +0900
committer Chris Ball <cjb@laptop.org> 1334973125 -0400

mmc: dw_mmc: prevent NULL dereference for dma_ops

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 the callback isn't defined, then we should run in PIO mode.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Will Newton <will.newton@imgtec.com>
Signed-off-by: Chris Ball <cjb@laptop.org>