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Diffstat (limited to 'drivers')
-rw-r--r--drivers/net/tg3.c12
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index 630c8a6c9f7..6f849bd5a7e 100644
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -3590,8 +3590,12 @@ static irqreturn_t tg3_interrupt(int irq, void *dev_id)
* Writing non-zero to intr-mbox-0 additional tells the
* NIC to stop sending us irqs, engaging "in-intr-handler"
* event coalescing.
+ *
+ * Flush the mailbox to de-assert the IRQ immediately to prevent
+ * spurious interrupts. The flush impacts performance but
+ * excessive spurious interrupts can be worse in some cases.
*/
- tw32_mailbox(MAILBOX_INTERRUPT_0 + TG3_64BIT_REG_LOW, 0x00000001);
+ tw32_mailbox_f(MAILBOX_INTERRUPT_0 + TG3_64BIT_REG_LOW, 0x00000001);
if (tg3_irq_sync(tp))
goto out;
sblk->status &= ~SD_STATUS_UPDATED;
@@ -3635,8 +3639,12 @@ static irqreturn_t tg3_interrupt_tagged(int irq, void *dev_id)
* writing non-zero to intr-mbox-0 additional tells the
* NIC to stop sending us irqs, engaging "in-intr-handler"
* event coalescing.
+ *
+ * Flush the mailbox to de-assert the IRQ immediately to prevent
+ * spurious interrupts. The flush impacts performance but
+ * excessive spurious interrupts can be worse in some cases.
*/
- tw32_mailbox(MAILBOX_INTERRUPT_0 + TG3_64BIT_REG_LOW, 0x00000001);
+ tw32_mailbox_f(MAILBOX_INTERRUPT_0 + TG3_64BIT_REG_LOW, 0x00000001);
if (tg3_irq_sync(tp))
goto out;
if (netif_rx_schedule_prep(dev)) {