qla4xxx was not always returning -EXYZ error codes when
qla4xxx_get_host_stats failed.
Signed-off-by: NMike Christie <michaelc@cs.wisc.edu>
Acked-by: NVikas Chaudhary <vikas.chaudhary@qlogic.com>
Reviewed-by: NHannes Reinecke <hare@suse.de>
Signed-off-by: NChristoph Hellwig <hch@lst.de>