diff options
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/tg3.c | 28 |
1 files changed, 11 insertions, 17 deletions
diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c index a174e616eda5..eea418124be1 100644 --- a/drivers/net/tg3.c +++ b/drivers/net/tg3.c @@ -36,6 +36,7 @@ #include <linux/ip.h> #include <linux/tcp.h> #include <linux/workqueue.h> +#include <linux/prefetch.h> #include <net/checksum.h> @@ -3278,8 +3279,9 @@ static irqreturn_t tg3_msi(int irq, void *dev_id, struct pt_regs *regs) { struct net_device *dev = dev_id; struct tg3 *tp = netdev_priv(dev); - struct tg3_hw_status *sblk = tp->hw_status; + prefetch(tp->hw_status); + prefetch(&tp->rx_rcb[tp->rx_rcb_ptr]); /* * Writing any value to intr-mbox-0 clears PCI INTA# and * chip-internal interrupt pending events. @@ -3288,19 +3290,9 @@ static irqreturn_t tg3_msi(int irq, void *dev_id, struct pt_regs *regs) * event coalescing. */ tw32_mailbox(MAILBOX_INTERRUPT_0 + TG3_64BIT_REG_LOW, 0x00000001); - tp->last_tag = sblk->status_tag; - rmb(); - if (tg3_irq_sync(tp)) - goto out; - sblk->status &= ~SD_STATUS_UPDATED; - if (likely(tg3_has_work(tp))) + if (likely(!tg3_irq_sync(tp))) netif_rx_schedule(dev); /* schedule NAPI poll */ - else { - /* No work, re-enable interrupts. */ - tw32_mailbox(MAILBOX_INTERRUPT_0 + TG3_64BIT_REG_LOW, - tp->last_tag << 24); - } -out: + return IRQ_RETVAL(1); } @@ -3330,9 +3322,10 @@ static irqreturn_t tg3_interrupt(int irq, void *dev_id, struct pt_regs *regs) if (tg3_irq_sync(tp)) goto out; sblk->status &= ~SD_STATUS_UPDATED; - if (likely(tg3_has_work(tp))) + if (likely(tg3_has_work(tp))) { + prefetch(&tp->rx_rcb[tp->rx_rcb_ptr]); netif_rx_schedule(dev); /* schedule NAPI poll */ - else { + } else { /* No work, shared interrupt perhaps? re-enable * interrupts, and flush that PCI write */ @@ -3374,9 +3367,10 @@ static irqreturn_t tg3_interrupt_tagged(int irq, void *dev_id, struct pt_regs *r if (tg3_irq_sync(tp)) goto out; sblk->status &= ~SD_STATUS_UPDATED; - if (likely(tg3_has_work(tp))) + if (likely(tg3_has_work(tp))) { + prefetch(&tp->rx_rcb[tp->rx_rcb_ptr]); netif_rx_schedule(dev); /* schedule NAPI poll */ - else { + } else { /* no work, shared interrupt perhaps? re-enable * interrupts, and flush that PCI write */ |
