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Subject[PATCH 5.9 131/252] can: dev: can_restart(): post buffer from the right context
Date
From: Alejandro Concepcion Rodriguez <alejandro@acoro.eu>

[ Upstream commit a1e654070a60d5d4f7cce59c38f4ca790bb79121 ]

netif_rx() is meant to be called from interrupt contexts. can_restart() may be
called by can_restart_work(), which is called from a worqueue, so it may run in
process context. Use netif_rx_ni() instead.

Fixes: 39549eef3587 ("can: CAN Network device driver and Netlink interface")
Co-developed-by: Loris Fauster <loris.fauster@ttcontrol.com>
Signed-off-by: Loris Fauster <loris.fauster@ttcontrol.com>
Signed-off-by: Alejandro Concepcion Rodriguez <alejandro@acoro.eu>
Link: https://lore.kernel.org/r/4e84162b-fb31-3a73-fa9a-9438b4bd5234@acoro.eu
[mkl: use netif_rx_ni() instead of netif_rx_any_context()]
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/can/dev.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/can/dev.c b/drivers/net/can/dev.c
index d5e52ffc7ed25..4bc9aa6c34787 100644
--- a/drivers/net/can/dev.c
+++ b/drivers/net/can/dev.c
@@ -566,7 +566,7 @@ static void can_restart(struct net_device *dev)

cf->can_id |= CAN_ERR_RESTARTED;

- netif_rx(skb);
+ netif_rx_ni(skb);

stats->rx_packets++;
stats->rx_bytes += cf->can_dlc;
--
2.27.0


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