search for: sync_desc_cpu

...giseeq.c > > > index 39599bbb5d45b6..f91dae16d69a19 100644 > > > --- a/drivers/net/ethernet/seeq/sgiseeq.c > > > +++ b/drivers/net/ethernet/seeq/sgiseeq.c > > > @@ -112,14 +112,18 @@ struct sgiseeq_private { > > > > > > static inline void dma_sync_desc_cpu(struct net_device *dev, void *addr) > > > { > > > - dma_cache_sync(dev->dev.parent, addr, sizeof(struct sgiseeq_rx_desc), > > > - DMA_FROM_DEVICE); > > > + struct sgiseeq_private *sp = netdev_priv(dev); > > > + > > > + dma_sync_singl...

...hregs, sregs); so the driver will look at the rx descriptor on every interrupt, so we cache the rx descriptor on the first interrupt and if there was $no rx packet, we will only see it, if cache line gets flushed for some other reason. kick_tx() does a busy loop checking tx descriptors, with just sync_desc_cpu... Thomas. -- Crap can work. Given enough thrust pigs will fly, but it's not necessarily a good idea. [ RFC1925, 2.3 ]

...iptor on the first interrupt and if there was > $no rx packet, we will only see it, if cache line gets flushed for > some other reason. That means a transfer back to device ownership is missing after a (negative) check. > kick_tx() does a busy loop checking tx descriptors, > with just sync_desc_cpu... > > Thomas. > > -- > Crap can work. Given enough thrust pigs will fly, but it's not necessarily a > good idea. [ RFC1925, 2.3 ] ---end quoted text---

...the driver will look at the rx descriptor on every interrupt, so > we cache the rx descriptor on the first interrupt and if there was > $no rx packet, we will only see it, if cache line gets flushed for > some other reason. kick_tx() does a busy loop checking tx descriptors, > with just sync_desc_cpu... the patch below fixes the problem. Thomas. diff --git a/drivers/net/ethernet/seeq/sgiseeq.c b/drivers/net/ethernet/seeq/sgiseeq.c index 8507ff242014..876e3700a0e4 100644 --- a/drivers/net/ethernet/seeq/sgiseeq.c +++ b/drivers/net/ethernet/seeq/sgiseeq.c @@ -112,14 +112,18 @@ struct sgiseeq_p...