qla4xxx: check the return value of dma_alloc_coherent()
qla4xxx: check the return value of dma_alloc_coherent()

the qla4xxx_alloc_fw_dump() calls dma_alloc_coherent() but does not
check its return value.

Signed-off-by: Maurizio Lombardi <954d0c936553fa022eb0631b7a3a263f1388ea3d@redhat.com>
Acked-By: Nilesh Javali <c64d1aff7b4dc8d28adf2668c7f7d76566dc315a@qlogic.com>
Signed-off-by: Christoph Hellwig <923f7720577207a44b32e59bbfbea59d27f1ae8e@lst.de>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs