net: fec: only clear a queue's work bit if the queue was emptied

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[ Upstream commit 1c021bb717 ]

In the receive path a queue's work bit was cleared unconditionally even
if fec_enet_rx_queue only read out a part of the available packets from
the hardware. This resulted in not reading any packets in the next napi
turn and so packets were delayed or lost.

The obvious fix is to only clear a queue's bit when the queue was
emptied.

Fixes: 4d494cdc92 ("net: fec: change data structure to support multiqueue")
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Lucas Stach <l.stach@pengutronix.de>
Tested-by: Fugang Duan <fugang.duan@nxp.com>
Acked-by: Fugang Duan <fugang.duan@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>

...

This commit is contained in:

Uwe Kleine-König 2016-05-03 16:38:53 +02:00 • committed by Sasha Levin

parent 3f6683aa55

commit 361d2edcb4

1 changed files with 8 additions and 2 deletions

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drivers/net/ethernet/freescale/fec_main.c

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