diff options
| author |   Rob Herring <rob.herring@calxeda.com> | 2013-08-30 16:49:25 -0500 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2013-09-03 22:21:15 -0400 |
| commit | f7ea10520d7dacbc416d130c4b10505c66bf4c36 (patch) | |
| tree | 22fc089169eec46e71464711ee823e5c5272a2a0 /drivers | |
| parent | net: calxedaxgmac: fix race with tx queue stop/wake (diff) | |
| download | linux-dev-f7ea10520d7dacbc416d130c4b10505c66bf4c36.tar.xz linux-dev-f7ea10520d7dacbc416d130c4b10505c66bf4c36.zip | |
net: calxedaxgmac: enable interrupts after napi_enable
Fix a race condition where the interrupt handler may have called
napi_schedule before napi_enable is called. This would disable interrupts
and never actually schedule napi to run.
Reported-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/ethernet/calxeda/xgmac.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/net/ethernet/calxeda/xgmac.c b/drivers/net/ethernet/calxeda/xgmac.c index 5d0b61a5c72b..73d3f83468c4 100644 --- a/drivers/net/ethernet/calxeda/xgmac.c +++ b/drivers/net/ethernet/calxeda/xgmac.c @@ -959,9 +959,7 @@ static int xgmac_hw_init(struct net_device *dev) DMA_BUS_MODE_FB | DMA_BUS_MODE_ATDS | DMA_BUS_MODE_AAL; writel(value, ioaddr + XGMAC_DMA_BUS_MODE); - /* Enable interrupts */ - writel(DMA_INTR_DEFAULT_MASK, ioaddr + XGMAC_DMA_STATUS); - writel(DMA_INTR_DEFAULT_MASK, ioaddr + XGMAC_DMA_INTR_ENA); + writel(0, ioaddr + XGMAC_DMA_INTR_ENA); /* Mask power mgt interrupt */ writel(XGMAC_INT_STAT_PMTIM, ioaddr + XGMAC_INT_STAT); @@ -1029,6 +1027,10 @@ static int xgmac_open(struct net_device *dev) napi_enable(&priv->napi); netif_start_queue(dev); + /* Enable interrupts */ + writel(DMA_INTR_DEFAULT_MASK, ioaddr + XGMAC_DMA_STATUS); + writel(DMA_INTR_DEFAULT_MASK, ioaddr + XGMAC_DMA_INTR_ENA); + return 0; } |