From: Dario Binacchi Date: Fri, 22 Nov 2024 22:15:43 +0000 (+0100) Subject: can: sun4i_can: sun4i_can_err(): call can_change_state() even if cf is NULL X-Git-Tag: v5.15.174~163 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=46e062d62674871478b66c4feacb4b350c55e83c;p=thirdparty%2Fkernel%2Fstable.git can: sun4i_can: sun4i_can_err(): call can_change_state() even if cf is NULL [ Upstream commit ee6bf3677ae03569d833795064e17f605c2163c7 ] Call the function can_change_state() if the allocation of the skb fails, as it handles the cf parameter when it is null. Additionally, this ensures that the statistics related to state error counters (i. e. warning, passive, and bus-off) are updated. Fixes: 0738eff14d81 ("can: Allwinner A10/A20 CAN Controller support - Kernel module") Signed-off-by: Dario Binacchi Link: https://patch.msgid.link/20241122221650.633981-3-dario.binacchi@amarulasolutions.com Signed-off-by: Marc Kleine-Budde Signed-off-by: Sasha Levin --- diff --git a/drivers/net/can/sun4i_can.c b/drivers/net/can/sun4i_can.c index ab9adfe92a94b..aad1882a9be11 100644 --- a/drivers/net/can/sun4i_can.c +++ b/drivers/net/can/sun4i_can.c @@ -613,10 +613,10 @@ static int sun4i_can_err(struct net_device *dev, u8 isrc, u8 status) tx_state = txerr >= rxerr ? state : 0; rx_state = txerr <= rxerr ? state : 0; - if (likely(skb)) - can_change_state(dev, cf, tx_state, rx_state); - else - priv->can.state = state; + /* The skb allocation might fail, but can_change_state() + * handles cf == NULL. + */ + can_change_state(dev, cf, tx_state, rx_state); if (state == CAN_STATE_BUS_OFF) can_bus_off(dev); }