* [PATCH v2] can: etas_es58x: free netdev when register_candev() failed in es58x_init_netdev()
@ 2022-11-14 8:14 Zhang Changzhong
2022-11-14 8:32 ` Arunachalam Santhanam (MS/ETA-ETAS)
0 siblings, 1 reply; 2+ messages in thread
From: Zhang Changzhong @ 2022-11-14 8:14 UTC (permalink / raw)
To: Vincent Mailhol, Wolfgang Grandegger, Marc Kleine-Budde,
David S. Miller, Eric Dumazet, Jakub Kicinski, Paolo Abeni,
Arunachalam Santhanam
Cc: Zhang Changzhong, linux-can, netdev, linux-kernel
In case of register_candev() fails, clear es58x_dev->netdev[channel_idx]
and add free_candev(). Otherwise es58x_free_netdevs() will unregister
the netdev that has never been registered.
Fixes: 8537257874e9 ("can: etas_es58x: add core support for ETAS ES58X CAN USB interfaces")
Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com>
---
v1 -> v2: change to the correct 'Fixes' tag according to Vincent Mailhol
drivers/net/can/usb/etas_es58x/es58x_core.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/net/can/usb/etas_es58x/es58x_core.c b/drivers/net/can/usb/etas_es58x/es58x_core.c
index 25f863b..ddb7c57 100644
--- a/drivers/net/can/usb/etas_es58x/es58x_core.c
+++ b/drivers/net/can/usb/etas_es58x/es58x_core.c
@@ -2091,8 +2091,11 @@ static int es58x_init_netdev(struct es58x_device *es58x_dev, int channel_idx)
netdev->dev_port = channel_idx;
ret = register_candev(netdev);
- if (ret)
+ if (ret) {
+ es58x_dev->netdev[channel_idx] = NULL;
+ free_candev(netdev);
return ret;
+ }
netdev_queue_set_dql_min_limit(netdev_get_tx_queue(netdev, 0),
es58x_dev->param->dql_min_limit);
--
2.9.5
^ permalink raw reply related [flat|nested] 2+ messages in thread
* RE: [PATCH v2] can: etas_es58x: free netdev when register_candev() failed in es58x_init_netdev()
2022-11-14 8:14 [PATCH v2] can: etas_es58x: free netdev when register_candev() failed in es58x_init_netdev() Zhang Changzhong
@ 2022-11-14 8:32 ` Arunachalam Santhanam (MS/ETA-ETAS)
0 siblings, 0 replies; 2+ messages in thread
From: Arunachalam Santhanam (MS/ETA-ETAS) @ 2022-11-14 8:32 UTC (permalink / raw)
To: Zhang Changzhong, Vincent Mailhol, Wolfgang Grandegger,
EXTERNAL Kleine-Budde Marc (Pengutronix, XC-CT/ECP2),
David S. Miller, Eric Dumazet, Jakub Kicinski, Paolo Abeni
Cc: linux-can, netdev, linux-kernel
Hi Zhang,
Thank you for the update and patch.
-----Original Message-----
From: Zhang Changzhong <zhangchangzhong@huawei.com>
Sent: 14 November 2022 13:45
To: Vincent Mailhol <mailhol.vincent@wanadoo.fr>; Wolfgang Grandegger <wg@grandegger.com>; EXTERNAL Kleine-Budde Marc (Pengutronix, XC-CT/ECP2) <mkl@pengutronix.de>; David S. Miller <davem@davemloft.net>; Eric Dumazet <edumazet@google.com>; Jakub Kicinski <kuba@kernel.org>; Paolo Abeni <pabeni@redhat.com>; Arunachalam Santhanam (MS/ETA-ETAS) <arunachalam.santhanam@in.bosch.com>
Cc: Zhang Changzhong <zhangchangzhong@huawei.com>; linux-can@vger.kernel.org; netdev@vger.kernel.org; linux-kernel@vger.kernel.org
Subject: [PATCH v2] can: etas_es58x: free netdev when register_candev() failed in es58x_init_netdev()
In case of register_candev() fails, clear es58x_dev->netdev[channel_idx] and add free_candev(). Otherwise es58x_free_netdevs() will unregister the netdev that has never been registered.
Fixes: 8537257874e9 ("can: etas_es58x: add core support for ETAS ES58X CAN USB interfaces")
Signed-off-by: Zhang Changzhong <mailto:zhangchangzhong@huawei.com>
---
v1 -> v2: change to the correct 'Fixes' tag according to Vincent Mailhol
Acked-by: <arunachalam.santhanam@in.bosch.com>
drivers/net/can/usb/etas_es58x/es58x_core.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/net/can/usb/etas_es58x/es58x_core.c b/drivers/net/can/usb/etas_es58x/es58x_core.c
index 25f863b..ddb7c57 100644
--- a/drivers/net/can/usb/etas_es58x/es58x_core.c
+++ b/drivers/net/can/usb/etas_es58x/es58x_core.c
@@ -2091,8 +2091,11 @@ static int es58x_init_netdev(struct es58x_device *es58x_dev, int channel_idx)
netdev->dev_port = channel_idx;
ret = register_candev(netdev);
- if (ret)
+ if (ret) {
+ es58x_dev->netdev[channel_idx] = NULL;
+ free_candev(netdev);
return ret;
+ }
netdev_queue_set_dql_min_limit(netdev_get_tx_queue(netdev, 0),
es58x_dev->param->dql_min_limit);
--
2.9.5
^ permalink raw reply related [flat|nested] 2+ messages in thread
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2022-11-14 8:14 [PATCH v2] can: etas_es58x: free netdev when register_candev() failed in es58x_init_netdev() Zhang Changzhong
2022-11-14 8:32 ` Arunachalam Santhanam (MS/ETA-ETAS)
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