bfa: Do not call pci_enable_msix() after it failed once

Function pci_enable_msix() should not be called in case
it threw a negative errno from a previous call.
Signed-off-by: Alexander Gordeev <agordeev@redhat.com>
Acked-by: Anil Gurumurthy <anil.gurumurthy@qlogic.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

drivers/scsi/bfa/bfad.c

@@ -1235,9 +1235,8 @@ bfad_setup_intr(struct bfad_s *bfad)
 	   (bfa_asic_id_cb(pdev->device) && !msix_disable_cb)) {
 
 		error = pci_enable_msix(bfad->pcidev, msix_entries, bfad->nvec);
-		if (error) {
 		/* In CT1 & CT2, try to allocate just one vector */
-			if (bfa_asic_id_ctc(pdev->device)) {
+		if (error > 0 && bfa_asic_id_ctc(pdev->device)) {
 			printk(KERN_WARNING "bfa %s: trying one msix "
 			       "vector failed to allocate %d[%d]\n",
 			       bfad->pci_name, bfad->nvec, error);
@@ -1262,7 +1261,6 @@ bfad_setup_intr(struct bfad_s *bfad)
 				bfad->inst_no, error);
 			goto line_based;
 		}
-		}
 
 		/* Disable INTX in MSI-X mode */
 		pci_read_config_word(pdev, PCI_COMMAND, &reg);