From: Marc Kleine-Budde <mkl@pengutronix.de>
Date: Wed, 9 Oct 2019 13:15:07 +0000 (+0200)
Subject: can: rx-offload: can_rx_offload_offload_one(): increment rx_fifo_errors on queue... 
X-Git-Tag: v4.19.88~292
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=a85ce0107d6bd14f78424de2fac4420d46f15d4e;p=thirdparty%2Fkernel%2Fstable.git

can: rx-offload: can_rx_offload_offload_one(): increment rx_fifo_errors on queue overflow or OOM

[ 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>
---

diff --git a/drivers/net/can/rx-offload.c b/drivers/net/can/rx-offload.c
index e32b65599a5f2..16af09c71cfed 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;
 	}