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authorMark Lord <kernel@teksavvy.com>2010-09-04 14:17:59 +0000
committerDavid S. Miller <davem@davemloft.net>2010-09-07 13:57:23 -0700
commit32737e934a952c1b0c744f2a78d80089d15c7ee3 (patch)
treeca6b640910315f78fce923b9a2d601e7dd512f31 /drivers/net/b44.c
parentcf9b94f88bdbe8a02015fc30d7c232b2d262d4ad (diff)
downloadlinux-32737e934a952c1b0c744f2a78d80089d15c7ee3.tar.bz2
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>
Diffstat (limited to 'drivers/net/b44.c')
-rw-r--r--drivers/net/b44.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/net/b44.c b/drivers/net/b44.c
index 37617abc1647..1e620e287ae0 100644
--- a/drivers/net/b44.c
+++ b/drivers/net/b44.c
@@ -848,6 +848,15 @@ static int b44_poll(struct napi_struct *napi, int budget)
b44_tx(bp);
/* 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);
work_done = 0;