gianfar: Revive SKB recycling

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Before calling gfar_clean_tx_ring() the driver grabs an irqsave
spinlock, and then tries to recycle skbs. But since
skb_recycle_check() returns 0 with IRQs disabled, we'll never
recycle any skbs.

It appears that gfar_clean_tx_ring() and gfar_start_xmit() are
mostly idependent and can work in parallel, except when they
modify num_txbdfree.

So we can drop the lock from most sections and thus fix the skb
recycling.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Acked-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Anton Vorontsov 2009-11-10 14:11:10 +00:00 • committed by David S. Miller

parent 836cf7faf8

commit a3bc1f11e9

1 changed files with 19 additions and 12 deletions

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drivers/net/gianfar.c

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