cxgb3: Fix potential msi-x vector leak

Release vectors when a MSI-X allocation fails.

Signed-off-by: Divy Le Ray <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/net/cxgb3/cxgb3_main.c

···
 	while ((err = pci_enable_msix(adap->pdev, entries, vectors)) > 0)
 		vectors = err;
 
-	if (!err && vectors < (adap->params.nports + 1))
+	if (err < 0)
+		pci_disable_msix(adap->pdev);
+
+	if (!err && vectors < (adap->params.nports + 1)) {
+		pci_disable_msix(adap->pdev);
 		err = -1;
+	}
 
 	if (!err) {
 		for (i = 0; i < vectors; ++i)