MMC: OMAP: Check the get_cover_state function pointer if not set

If the get_cover_state is not set, it occurs the oops.

Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>

1 files changed, 4 insertions, 1 deletions

diff --git a/drivers/mmc/host/omap.c b/drivers/mmc/host/omap.c
index 9075838f712f..f7fb97802827 100644
--- a/drivers/mmc/host/omap.c
+++ b/drivers/mmc/host/omap.c
@@ -236,7 +236,10 @@ static void mmc_omap_release_slot(struct mmc_omap_slot *slot)
 static inline
 int mmc_omap_cover_is_open(struct mmc_omap_slot *slot)
 {
-        return slot->pdata->get_cover_state(mmc_dev(slot->mmc), slot->id);
+        if (slot->pdata->get_cover_state)
+                return slot->pdata->get_cover_state(mmc_dev(slot->mmc),
+                                                    slot->id);
+        return 0;
 }
 
 static ssize_t