1 files changed, 39 insertions, 3 deletions

diff --git a/drivers/net/ethernet/sfc/efx.c b/drivers/net/ethernet/sfc/efx.c
index a4ebd8715494..570ec72266f3 100644
--- a/drivers/net/ethernet/sfc/efx.c
+++ b/drivers/net/ethernet/sfc/efx.c
@@ -1289,9 +1289,8 @@ static int efx_init_io(struct efx_nic *efx)
 
 	pci_set_master(pci_dev);
 
-	/* Set the PCI DMA mask.  Try all possibilities from our
-	 * genuine mask down to 32 bits, because some architectures
-	 * (e.g. x86_64 with iommu_sac_force set) will allow 40 bit
+	/* Set the PCI DMA mask.  Try all possibilities from our genuine mask
+	 * down to 32 bits, because some architectures will allow 40 bit
 	 * masks event though they reject 46 bit masks.
 	 */
 	while (dma_mask > 0x7fffffffUL) {
@@ -1551,6 +1550,38 @@ static int efx_probe_interrupts(struct efx_nic *efx)
 	return 0;
 }
 
+#if defined(CONFIG_SMP)
+static void efx_set_interrupt_affinity(struct efx_nic *efx)
+{
+	struct efx_channel *channel;
+	unsigned int cpu;
+
+	efx_for_each_channel(channel, efx) {
+		cpu = cpumask_local_spread(channel->channel,
+					   pcibus_to_node(efx->pci_dev->bus));
+		irq_set_affinity_hint(channel->irq, cpumask_of(cpu));
+	}
+}
+
+static void efx_clear_interrupt_affinity(struct efx_nic *efx)
+{
+	struct efx_channel *channel;
+
+	efx_for_each_channel(channel, efx)
+		irq_set_affinity_hint(channel->irq, NULL);
+}
+#else
+static void
+efx_set_interrupt_affinity(struct efx_nic *efx __attribute__ ((unused)))
+{
+}
+
+static void
+efx_clear_interrupt_affinity(struct efx_nic *efx __attribute__ ((unused)))
+{
+}
+#endif /* CONFIG_SMP */
+
 static int efx_soft_enable_interrupts(struct efx_nic *efx)
 {
 	struct efx_channel *channel, *end_channel;
@@ -3149,6 +3180,7 @@ bool efx_rps_check_rule(struct efx_arfs_rule *rule, unsigned int filter_idx,
 	return true;
 }
 
+static
 struct hlist_head *efx_rps_hash_bucket(struct efx_nic *efx,
 				       const struct efx_filter_spec *spec)
 {
@@ -3308,6 +3340,7 @@ static void efx_pci_remove_main(struct efx_nic *efx)
 	cancel_work_sync(&efx->reset_work);
 
 	efx_disable_interrupts(efx);
+	efx_clear_interrupt_affinity(efx);
 	efx_nic_fini_interrupt(efx);
 	efx_fini_port(efx);
 	efx->type->fini(efx);
@@ -3457,6 +3490,8 @@ static int efx_pci_probe_main(struct efx_nic *efx)
 	rc = efx_nic_init_interrupt(efx);
 	if (rc)
 		goto fail5;
+
+	efx_set_interrupt_affinity(efx);
 	rc = efx_enable_interrupts(efx);
 	if (rc)
 		goto fail6;
@@ -3464,6 +3499,7 @@ static int efx_pci_probe_main(struct efx_nic *efx)
 	return 0;
 
  fail6:
+	efx_clear_interrupt_affinity(efx);
 	efx_nic_fini_interrupt(efx);
  fail5:
 	efx_fini_port(efx);