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[21/33] can: ti_hecc: ti_hecc_error(): increase error counters if skb enqueueing via can_rx_offload_queue_sorted() fails

Message ID 20191105163215.30194-22-mkl@pengutronix.de
State Accepted
Delegated to: David Miller
Headers show
Series pull-request: can 2019-11-05 | expand

Commit Message

Marc Kleine-Budde Nov. 5, 2019, 4:32 p.m. UTC 
The call to can_rx_offload_queue_sorted() may fail and return an error
(in the current implementation due to resource shortage). The passed skb
is consumed.

This patch adds incrementing of the appropriate error counters to let
the device statistics reflect that there's a problem.

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
---
 drivers/net/can/ti_hecc.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
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Patch

diff --git a/drivers/net/can/ti_hecc.c b/drivers/net/can/ti_hecc.c
index f8b19eef5d26..91188e6d4f78 100644
--- a/drivers/net/can/ti_hecc.c
+++ b/drivers/net/can/ti_hecc.c
@@ -558,6 +558,7 @@  static int ti_hecc_error(struct net_device *ndev, int int_status,
 	struct can_frame *cf;
 	struct sk_buff *skb;
 	u32 timestamp;
+	int err;
 
 	/* propagate the error condition to the can stack */
 	skb = alloc_can_err_skb(ndev, &cf);
@@ -639,7 +640,9 @@  static int ti_hecc_error(struct net_device *ndev, int int_status,
 	}
 
 	timestamp = hecc_read(priv, HECC_CANLNT);
-	can_rx_offload_queue_sorted(&priv->offload, skb, timestamp);
+	err = can_rx_offload_queue_sorted(&priv->offload, skb, timestamp);
+	if (err)
+		ndev->stats.rx_fifo_errors++;
 
 	return 0;
 }