Commit 32737e93 authored Sep 04, 2010 by Mark Lord Committed by David S. Miller Sep 07, 2010

PATCH: b44 Handle RX FIFO overflow better (simplified)



This patch is a simplified version of the original patch from James Courtier-Dutton.

>From: James Courtier-Dutton
>Subject: [PATCH] Fix b44 RX FIFO overflow recovery.
>Date: Wednesday, June 30, 2010 - 1:11 pm
>
>This patch improves the recovery after a RX FIFO overflow on the b44
>Ethernet NIC.
>Before it would do a complete chip reset, resulting is loss of link
>for a few seconds.
>This patch improves this to do recovery in about 20ms without loss of link.
>
>Signed off by: James@superbug.co.uk

Signed-off-by: Mark Lord <mlord@pobox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent cf9b94f8

drivers/net/b44.c

+9 −0

Original line number	Original line	Diff line number	Diff line
	@@ -848,6 +848,15 @@ static int b44_poll(struct napi_struct *napi, int budget)
	b44_tx(bp);		b44_tx(bp);
	/* spin_unlock(&bp->tx_lock); */		/* spin_unlock(&bp->tx_lock); */
	}		}
			if (bp->istat & ISTAT_RFO) { /* fast recovery, in ~20msec */
			bp->istat &= ~ISTAT_RFO;
			b44_disable_ints(bp);
			ssb_device_enable(bp->sdev, 0); /* resets ISTAT_RFO */
			b44_init_rings(bp);
			b44_init_hw(bp, B44_FULL_RESET_SKIP_PHY);
			netif_wake_queue(bp->dev);
			}

	spin_unlock_irqrestore(&bp->lock, flags);		spin_unlock_irqrestore(&bp->lock, flags);

	work_done = 0;		work_done = 0;

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