From 32737e934a952c1b0c744f2a78d80089d15c7ee3 Mon Sep 17 00:00:00 2001 From: Mark Lord Date: Sat, 4 Sep 2010 14:17:59 +0000 Subject: 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 Signed-off-by: David S. Miller --- drivers/net/b44.c | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'drivers/net/b44.c') 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; -- cgit v1.2.2 From bcf64aa379fcadd074449cbf0c049da70071b06f Mon Sep 17 00:00:00 2001 From: Paul Fertser Date: Mon, 11 Oct 2010 15:45:35 -0700 Subject: b44: fix carrier detection on bind For carrier detection to work properly when binding the driver with a cable unplugged, netif_carrier_off() should be called after register_netdev(), not before. Signed-off-by: Paul Fertser Signed-off-by: David S. Miller --- drivers/net/b44.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/net/b44.c') diff --git a/drivers/net/b44.c b/drivers/net/b44.c index 1e620e287ae0..efeffdf9e5fa 100644 --- a/drivers/net/b44.c +++ b/drivers/net/b44.c @@ -2170,8 +2170,6 @@ static int __devinit b44_init_one(struct ssb_device *sdev, dev->irq = sdev->irq; SET_ETHTOOL_OPS(dev, &b44_ethtool_ops); - netif_carrier_off(dev); - err = ssb_bus_powerup(sdev->bus, 0); if (err) { dev_err(sdev->dev, @@ -2213,6 +2211,8 @@ static int __devinit b44_init_one(struct ssb_device *sdev, goto err_out_powerdown; } + netif_carrier_off(dev); + ssb_set_drvdata(sdev, dev); /* Chip reset provides power to the b44 MAC & PCI cores, which -- cgit v1.2.2