From: Hauke Mehrtens hauke@hauke-m.de
[ Upstream commit 9423361da52356cb68642db5b2729b6b85aad330 ]
The napi_schedule() call will only schedule the NAPI if it is not already running. To make sure that we do not deactivate interrupts without scheduling NAPI only deactivate the interrupts in case NAPI also gets scheduled.
Signed-off-by: Hauke Mehrtens hauke@hauke-m.de Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/ethernet/lantiq_xrx200.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-)
--- a/drivers/net/ethernet/lantiq_xrx200.c +++ b/drivers/net/ethernet/lantiq_xrx200.c @@ -345,10 +345,12 @@ static irqreturn_t xrx200_dma_irq(int ir { struct xrx200_chan *ch = ptr;
- ltq_dma_disable_irq(&ch->dma); - ltq_dma_ack_irq(&ch->dma); + if (napi_schedule_prep(&ch->napi)) { + __napi_schedule(&ch->napi); + ltq_dma_disable_irq(&ch->dma); + }
- napi_schedule(&ch->napi); + ltq_dma_ack_irq(&ch->dma);
return IRQ_HANDLED; }