scsi_dh_hp_sw: fix return value on failed allocation

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Mike Christie <michaelc@cs.wisc.edu>
Reviewed-by: Hannes Reinecke <hare@suse.de>
This commit is contained in:
Christoph Hellwig 2014-09-14 11:01:34 -07:00
commit 0b9c08442c