target/pscsi: blk_make_request() returns an ERR_PTR()

The check is wrong here because blk_make_request() returns an
ERR_PTR() and it doesn't return NULL.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Nicholas A. Bellinger <nab@linux-iscsi.org>
1 file changed