tree ee1f5c96aba8a19b2567d0f542e787f81a1f13f1
parent ac0865ff33870cdf2cd480165045e1bc311e9fa2
author Rabin Vincent <rabin@rab.in> 1238918453 +0530
committer Andy Fleming <afleming@freescale.com> 1243981136 -0500

mmc: check find_mmc_device return value

find_mmc_device returns NULL if an invalid device number is specified.
Check for this to avoid dereferencing NULL pointers.

Signed-off-by: Rabin Vincent <rabin@rab.in>