netdev - [PATCH net 06/15] can: hi311x: hi3110_can_ist(): update state error statistics if skb allocation fails

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Message-ID: <20241202090040.1110280-7-mkl@pengutronix.de>
Date: Mon,  2 Dec 2024 09:55:40 +0100
From: Marc Kleine-Budde <mkl@...gutronix.de>
To: netdev@...r.kernel.org
Cc: davem@...emloft.net,
	kuba@...nel.org,
	linux-can@...r.kernel.org,
	kernel@...gutronix.de,
	Dario Binacchi <dario.binacchi@...rulasolutions.com>,
	Marc Kleine-Budde <mkl@...gutronix.de>
Subject: [PATCH net 06/15] can: hi311x: hi3110_can_ist(): update state error statistics if skb allocation fails

From: Dario Binacchi <dario.binacchi@...rulasolutions.com>

Ensure that the statistics related to state error counters
(i. e. warning, passive, and bus-off) are updated even in case the skb
allocation fails. Additionally, also handle bus-off state is now.

Signed-off-by: Dario Binacchi <dario.binacchi@...rulasolutions.com>
Link: https://patch.msgid.link/20241122221650.633981-6-dario.binacchi@amarulasolutions.com
Signed-off-by: Marc Kleine-Budde <mkl@...gutronix.de>
---
 drivers/net/can/spi/hi311x.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/net/can/spi/hi311x.c b/drivers/net/can/spi/hi311x.c
index b67464df25ff..25d9b32f5701 100644
--- a/drivers/net/can/spi/hi311x.c
+++ b/drivers/net/can/spi/hi311x.c
@@ -663,8 +663,6 @@ static irqreturn_t hi3110_can_ist(int irq, void *dev_id)
 			u8 rxerr, txerr;
 
 			skb = alloc_can_err_skb(net, &cf);
-			if (!skb)
-				break;
 
 			txerr = hi3110_read(spi, HI3110_READ_TEC);
 			rxerr = hi3110_read(spi, HI3110_READ_REC);
@@ -673,14 +671,15 @@ static irqreturn_t hi3110_can_ist(int irq, void *dev_id)
 			can_change_state(net, cf, tx_state, rx_state);
 
 			if (new_state == CAN_STATE_BUS_OFF) {
-				netif_rx(skb);
+				if (skb)
+					netif_rx(skb);
 				can_bus_off(net);
 				if (priv->can.restart_ms == 0) {
 					priv->force_quit = 1;
 					hi3110_hw_sleep(spi);
 					break;
 				}
-			} else {
+			} else if (skb) {
 				cf->can_id |= CAN_ERR_CNT;
 				cf->data[6] = txerr;
 				cf->data[7] = rxerr;
-- 
2.45.2