[PATCH 4.14 019/209] can: rx-offload: can_rx_offload_offload_one(): increment rx_fifo_errors on queue overflow or OOM

Greg Kroah-Hartman
2019-12-04T18:25:10Z

From: Marc Kleine-Budde <mkl@pengutronix.de>

[ Upstream commit 4e9016bee3bf0c24963097edace034ff205b565c ]

If the rx-offload skb_queue is full or the skb allocation fails (due to OOM),
the mailbox contents is discarded.

This patch adds the incrementing of the rx_fifo_errors statistics counter.

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/can/rx-offload.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/can/rx-offload.c b/drivers/net/can/rx-offload.c
index c0e51a2f8e4fc..b068e2320c794 100644
--- a/drivers/net/can/rx-offload.c
+++ b/drivers/net/can/rx-offload.c
@@ -134,8 +134,10 @@ static struct sk_buff *can_rx_offload_offload_one(struct can_rx_offload *offload

ret = offload->mailbox_read(offload, &cf_overflow,
&timestamp, n);
- if (ret)
+ if (ret) {
offload->dev->stats.rx_dropped++;
+ offload->dev->stats.rx_fifo_errors++;
+ }

return NULL;
}
--
2.20.1