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[net,03/15] can: dev: can_restart(): post buffer from the right context

Message ID 20201115174131.2089251-4-mkl@pengutronix.de (mailing list archive)
State Accepted
Delegated to: Netdev Maintainers
Headers show
Series pull-request: can 2020-11-15 | expand

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Context Check Description
netdev/tree_selection success Series ignored based on subject

Commit Message

Marc Kleine-Budde Nov. 15, 2020, 5:41 p.m. UTC 
From: Alejandro Concepcion Rodriguez <alejandro@acoro.eu>

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>
---
 drivers/net/can/dev.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/drivers/net/can/dev.c b/drivers/net/can/dev.c
index 6dee4f8f2024..81e39d7507d8 100644
--- a/drivers/net/can/dev.c
+++ b/drivers/net/can/dev.c
@@ -592,7 +592,7 @@  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;