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can: rx-offload: can_rx_offload_irq_offload_timestamp(): continue on error

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In case of a resource shortage, i.e. the rx_offload queue will overflow
or a skb fails to be allocated (due to OOM),
can_rx_offload_offload_one() will call mailbox_read() to discard the
mailbox and return an ERR_PTR.

However can_rx_offload_irq_offload_timestamp() bails out in the error
case. In case of a resource shortage all mailboxes should be discarded,
to avoid an IRQ storm and give the system some time to recover.

Since can_rx_offload_irq_offload_timestamp() is typically called from a
while loop, all message will eventually be discarded. So let's continue
on error instead to discard them directly.

Signed-off-by: Jeroen Hofstee <jhofstee@victronenergy.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
Jeroen Hofstee 2019-09-24 18:45:38 +00:00 committed by Marc Kleine-Budde
parent d763ab3044
commit c2a9f74c9d
1 changed files with 1 additions and 1 deletions
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2
drivers/net/can/rx-offload.c
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@ -216,7 +216,7 @@ int can_rx_offload_irq_offload_timestamp(struct can_rx_offload *offload, u64 pen
skb = can_rx_offload_offload_one(offload, i);
if (IS_ERR_OR_NULL(skb))
break;
continue;
__skb_queue_add_sort(&skb_queue, skb, can_rx_offload_compare);
}