netdev - [PATCH v3 net-next 11/11] qede: make driver reliable on unload after failures

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Message-ID: <20200729113846.1551-12-irusskikh@marvell.com>
Date:   Wed, 29 Jul 2020 14:38:46 +0300
From:   Igor Russkikh <irusskikh@...vell.com>
To:     <netdev@...r.kernel.org>
CC:     "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Ariel Elior <aelior@...vell.com>,
        Michal Kalderon <mkalderon@...vell.com>,
        Alexander Lobakin <alobakin@...vell.com>,
        "Igor Russkikh" <irusskikh@...vell.com>,
        Michal Kalderon <michal.kalderon@...vell.com>
Subject: [PATCH v3 net-next 11/11] qede: make driver reliable on unload after failures

In case recovery was not successful, netdev still should be
present. But we should clear cdev if something bad happens
on recovery.

We also check cdev for null on dev close. That could be a case
if recovery was not successful.

Signed-off-by: Igor Russkikh <irusskikh@...vell.com>
Signed-off-by: Alexander Lobakin <alobakin@...vell.com>
Signed-off-by: Michal Kalderon <michal.kalderon@...vell.com>
---
 drivers/net/ethernet/qlogic/qede/qede_main.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/qlogic/qede/qede_main.c b/drivers/net/ethernet/qlogic/qede/qede_main.c
index 937d8e69ad39..eeb4a7311633 100644
--- a/drivers/net/ethernet/qlogic/qede/qede_main.c
+++ b/drivers/net/ethernet/qlogic/qede/qede_main.c
@@ -1239,7 +1239,10 @@ static int __qede_probe(struct pci_dev *pdev, u32 dp_module, u8 dp_level,
 err4:
 	qede_rdma_dev_remove(edev, (mode == QEDE_PROBE_RECOVERY));
 err3:
-	free_netdev(edev->ndev);
+	if (mode != QEDE_PROBE_RECOVERY)
+		free_netdev(edev->ndev);
+	else
+		edev->cdev = NULL;
 err2:
 	qed_ops->common->slowpath_stop(cdev);
 err1:
@@ -2474,7 +2477,8 @@ static int qede_close(struct net_device *ndev)
 
 	qede_unload(edev, QEDE_UNLOAD_NORMAL, false);
 
-	edev->ops->common->update_drv_state(edev->cdev, false);
+	if (edev->cdev)
+		edev->ops->common->update_drv_state(edev->cdev, false);
 
 	return 0;
 }
-- 
2.17.1