qed: Prevent 100g from working in MSI

Adapter can support 100g in both MSIx and INTa, but not in MSI.
Signed-off-by: Sudarsana Reddy Kalluru <sudarsana.kalluru@qlogic.com>
Signed-off-by: Yuval Mintz <Yuval.Mintz@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/qlogic/qed/qed_dev.c

@@ -835,6 +835,11 @@ int qed_hw_init(struct qed_dev *cdev,
 	u32 load_code, param;
 	int rc, mfw_rc, i;
 
+	if ((int_mode == QED_INT_MODE_MSI) && (cdev->num_hwfns > 1)) {
+		DP_NOTICE(cdev, "MSI mode is not supported for CMT devices\n");
+		return -EINVAL;
+	}
+
 	if (IS_PF(cdev)) {
 		rc = qed_init_fw_data(cdev, bin_fw_data);
 		if (rc != 0)

drivers/net/ethernet/qlogic/qed/qed_main.c

@@ -413,6 +413,7 @@ static int qed_set_int_mode(struct qed_dev *cdev, bool force_mode)
 		/* Fallthrough */
 
 	case QED_INT_MODE_MSI:
+		if (cdev->num_hwfns == 1) {
 			rc = pci_enable_msi(cdev->pdev);
 			if (!rc) {
 				int_params->out.int_mode = QED_INT_MODE_MSI;
@@ -422,6 +423,7 @@ static int qed_set_int_mode(struct qed_dev *cdev, bool force_mode)
 			DP_NOTICE(cdev, "Failed to enable MSI\n");
 			if (force_mode)
 				goto out;
+		}
 		/* Fallthrough */
 
 	case QED_INT_MODE_INTA: