scsi: qedf: Retry qed->probe during recovery

During recovery due to FCoE fn ramrod failure we wait for 2 sec and then
call qed->probe. If probe fails then retry max 10 times.

Link: https://lore.kernel.org/r/20200907121443.5150-8-jhasan@marvell.comSigned-off-by: Saurav Kashyap <skashyap@marvell.com>
Signed-off-by: Javed Hasan <jhasan@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/qedf/qedf_main.c

@@ -3267,11 +3267,16 @@ static int __qedf_probe(struct pci_dev *pdev, int mode)
 	void *task_start, *task_end;
 	struct qed_slowpath_params slowpath_params;
 	struct qed_probe_params qed_params;
+	u16 retry_cnt = 10;
 
 	/*
 	 * When doing error recovery we didn't reap the lport so don't try
 	 * to reallocate it.
 	 */
+retry_probe:
+	if (mode == QEDF_MODE_RECOVERY)
+		msleep(2000);
+
 	if (mode != QEDF_MODE_RECOVERY) {
 		lport = libfc_host_alloc(&qedf_host_template,
 		    sizeof(struct qedf_ctx));
@@ -3358,6 +3363,12 @@ static int __qedf_probe(struct pci_dev *pdev, int mode)
 	qed_params.is_vf = is_vf;
 	qedf->cdev = qed_ops->common->probe(pdev, &qed_params);
 	if (!qedf->cdev) {
+		if ((mode == QEDF_MODE_RECOVERY) && retry_cnt) {
+			QEDF_ERR(&qedf->dbg_ctx,
+				"Retry %d initialize hardware\n", retry_cnt);
+			retry_cnt--;
+			goto retry_probe;
+		}
 		QEDF_ERR(&qedf->dbg_ctx, "common probe failed.\n");
 		rc = -ENODEV;
 		goto err1;