mlx4_core: Avoid vunmap() of invalid pointer if allocation fails
mlx4_core: Avoid vunmap() of invalid pointer if allocation fails

Signed-off-by: Ali Ayoub <b42a6d93d796915222f6ffb2ffdd6137d93c1cdb@mellanox.com>
Signed-off-by: Roland Dreier <91e9b5f7ca0bb6300133ed378670d64af90dde66@cisco.com>

TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs