[SCSI] ibmvfc: Fix invalid error response handling

Fix an obvious bug in processing error responses for SCSI commands
which can result in successful responses being incorrectly returned
with DID_ERROR.

Signed-off-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

drivers/scsi/ibmvscsi/ibmvfc.c

@@ -275,7 +275,7 @@ static int ibmvfc_get_err_result(struct ibmvfc_cmd *vfc_cmd)
 	int fc_rsp_len = rsp->fcp_rsp_len;
 
 	if ((rsp->flags & FCP_RSP_LEN_VALID) &&
-	    ((!fc_rsp_len && fc_rsp_len != 4 && fc_rsp_len != 8) ||
+	    ((fc_rsp_len && fc_rsp_len != 4 && fc_rsp_len != 8) ||
 	     rsp->data.info.rsp_code))
 		return DID_ERROR << 16;