qed: Add cleanup in qed_slowpath_start()

[ Upstream commit de0e4fd2f07ce3bbdb69dfb8d9426b7227451b69 ]

If qed_mcp_send_drv_version() fails, no cleanup is executed, leading to
memory leaks. To fix this issue, introduce the label 'err4' to perform the
cleanup work before returning the error.

Signed-off-by: Wenwen Wang <wenwen@cs.uga.edu>
Acked-by: Sudarsana Reddy Kalluru <skalluru@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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

@@ -1150,7 +1150,7 @@ static int qed_slowpath_start(struct qed_dev *cdev,
 					      &drv_version);
 		if (rc) {
 			DP_NOTICE(cdev, "Failed sending drv version command\n");
-			return rc;
+			goto err4;
 		}
 	}
 
@@ -1158,6 +1158,8 @@ static int qed_slowpath_start(struct qed_dev *cdev,
 
 	return 0;
 
+err4:
+	qed_ll2_dealloc_if(cdev);
 err3:
 	qed_hw_stop(cdev);
 err2: