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can: bcm: check the result of can_send() in bcm_can_tx()

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[ Upstream commit 3fd7bfd28c ]

If can_send() fail, it should not update frames_abs counter
in bcm_can_tx(). Add the result check for can_send() in bcm_can_tx().

Suggested-by: Marc Kleine-Budde <mkl@pengutronix.de>
Suggested-by: Oliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: Ziyang Xuan <william.xuanziyang@huawei.com>
Link: https://lore.kernel.org/all/9851878e74d6d37aee2f1ee76d68361a46f89458.1663206163.git.william.xuanziyang@huawei.com
Acked-by: Oliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Ziyang Xuan 2022-09-15 09:55:56 +08:00 committed by Greg Kroah-Hartman
parent 3423a50fa0
commit 4a5eab200e
1 changed files with 4 additions and 3 deletions
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7
net/can/bcm.c
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@ -274,6 +274,7 @@ static void bcm_can_tx(struct bcm_op *op)
struct sk_buff *skb;
struct net_device *dev;
struct canfd_frame *cf = op->frames + op->cfsiz * op->currframe;
int err;
/* no target device? => exit */
if (!op->ifindex)
@ -298,11 +299,11 @@ static void bcm_can_tx(struct bcm_op *op)
/* send with loopback */
skb->dev = dev;
can_skb_set_owner(skb, op->sk);
can_send(skb, 1);
err = can_send(skb, 1);
if (!err)
op->frames_abs++;
/* update statistics */
op->currframe++;
op->frames_abs++;
/* reached last frame? */
if (op->currframe >= op->nframes)