net/fec: Don't let ndo_start_xmit return NETDEV_TX_BUSY without link

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Don't test for having link and let hardware deal with this situation.

Without this patch I see a machine running an -rt patched Linux being
stuck in sch_direct_xmit when it looses link while there is still a
packet to be sent. In this case the fec_enet_start_xmit routine returned
NETDEV_TX_BUSY which makes the network stack reschedule the packet and
so sch_direct_xmit calls fec_enet_start_xmit again.
I failed to reproduce a complete hang without -rt, but I think the
problem exists there, too.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Uwe Kleine-König 2013-07-30 11:29:40 +02:00 • committed by David S. Miller

parent a0db856a95

commit a264b981f2

1 changed files with 0 additions and 5 deletions

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drivers/net/ethernet/freescale/fec_main.c

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