This is a note to let you know that I've just added the patch titled
can: gs_usb: gs_usb_receive_bulk_callback(): count RX overflow errors also in case of OOM
to the 4.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
can-gs_usb-gs_usb_receive_bulk_callback-count-rx-ove.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 85b69d6cb70f4fc41fd5ec0ebe931552faaf0e71
Author: Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx>
Date: Tue Jul 4 11:23:37 2023 +0200
can: gs_usb: gs_usb_receive_bulk_callback(): count RX overflow errors also in case of OOM
[ Upstream commit 6c8bc15f02b85bc8f47074110d8fd8caf7a1e42d ]
In case of an RX overflow error from the CAN controller and an OOM
where no skb can be allocated, the error counters are not incremented.
Fix this by first incrementing the error counters and then allocate
the skb.
Fixes: d08e973a77d1 ("can: gs_usb: Added support for the GS_USB CAN devices")
Link: https://lore.kernel.org/all/20230718-gs_usb-cleanups-v1-7-c3b9154ec605@xxxxxxxxxxxxxx
Signed-off-by: Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/net/can/usb/gs_usb.c b/drivers/net/can/usb/gs_usb.c
index b2e48c8595f0f..fd80af775ec75 100644
--- a/drivers/net/can/usb/gs_usb.c
+++ b/drivers/net/can/usb/gs_usb.c
@@ -389,6 +389,9 @@ static void gs_usb_receive_bulk_callback(struct urb *urb)
}
if (hf->flags & GS_CAN_FLAG_OVERFLOW) {
+ stats->rx_over_errors++;
+ stats->rx_errors++;
+
skb = alloc_can_err_skb(netdev, &cf);
if (!skb)
goto resubmit_urb;
@@ -396,8 +399,6 @@ static void gs_usb_receive_bulk_callback(struct urb *urb)
cf->can_id |= CAN_ERR_CRTL;
cf->can_dlc = CAN_ERR_DLC;
cf->data[1] = CAN_ERR_CRTL_RX_OVERFLOW;
- stats->rx_over_errors++;
- stats->rx_errors++;
netif_rx(skb);
}
