linux-kernel - [PATCH v2 05/12] can: hi311x: update state error statistics if skb allocation fails

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Message-ID: <20241122221650.633981-6-dario.binacchi@amarulasolutions.com>
Date: Fri, 22 Nov 2024 23:15:46 +0100
From: Dario Binacchi <dario.binacchi@...rulasolutions.com>
To: linux-kernel@...r.kernel.org
Cc: linux-amarula@...rulasolutions.com,
	Dario Binacchi <dario.binacchi@...rulasolutions.com>,
	Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
	Marc Kleine-Budde <mkl@...gutronix.de>,
	Vincent Mailhol <mailhol.vincent@...adoo.fr>,
	linux-can@...r.kernel.org
Subject: [PATCH v2 05/12] can: hi311x: update state error statistics if skb allocation fails

This patch ensures 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, the bus-off state is now also handled.

Signed-off-by: Dario Binacchi <dario.binacchi@...rulasolutions.com>

---

Changes in v2:
- Added in v2

 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;
-- 
2.43.0