e1000: FIX: Stop raw interrupts disabled nag from RT
Current e1000_xmit_frame spews raw interrupt disabled nag messages when used with RT kernel patches. This patch uses spin_trylock_irqsave, which allows RT patches to properly manage the irq semantics. Signed-off-by: Mark Huth <mhuth@mvista.com> Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
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@ -3378,12 +3378,9 @@ e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
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(adapter->hw.mac_type == e1000_82573))
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e1000_transfer_dhcp_info(adapter, skb);
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local_irq_save(flags);
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if (!spin_trylock(&tx_ring->tx_lock)) {
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if (!spin_trylock_irqsave(&tx_ring->tx_lock, flags))
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/* Collision - tell upper layer to requeue */
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local_irq_restore(flags);
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return NETDEV_TX_LOCKED;
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}
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/* need: count + 2 desc gap to keep tail from touching
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* head, otherwise try next time */
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