From: Ayaz Abdulla Date: Sun, 11 Jan 2009 08:09:04 +0000 (-0800) Subject: forcedeth: napi schedule lock fix X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=eb10a781824ca63c4e484c4642a19b3370980792;p=mv-sheeva.git forcedeth: napi schedule lock fix This patch fixes a potential race condition between scheduling napi and completing napi poll. The call to netif_rx_schedule should be under protection of the lock (as is the completion), otherwise, interrupts could be masked off. Signed-off-by: Ayaz Abdulla Signed-off-by: David S. Miller --- diff --git a/drivers/net/forcedeth.c b/drivers/net/forcedeth.c index e06782a60bd..5b910cf6374 100644 --- a/drivers/net/forcedeth.c +++ b/drivers/net/forcedeth.c @@ -3405,10 +3405,10 @@ static irqreturn_t nv_nic_irq(int foo, void *data) #ifdef CONFIG_FORCEDETH_NAPI if (events & NVREG_IRQ_RX_ALL) { + spin_lock(&np->lock); netif_rx_schedule(&np->napi); /* Disable furthur receive irq's */ - spin_lock(&np->lock); np->irqmask &= ~NVREG_IRQ_RX_ALL; if (np->msi_flags & NV_MSI_X_ENABLED) @@ -3522,10 +3522,10 @@ static irqreturn_t nv_nic_irq_optimized(int foo, void *data) #ifdef CONFIG_FORCEDETH_NAPI if (events & NVREG_IRQ_RX_ALL) { + spin_lock(&np->lock); netif_rx_schedule(&np->napi); /* Disable furthur receive irq's */ - spin_lock(&np->lock); np->irqmask &= ~NVREG_IRQ_RX_ALL; if (np->msi_flags & NV_MSI_X_ENABLED)