Anton Vorontsov a3bc1f11e9
gianfar: Revive SKB recycling ...
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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