diff mbox series

[v5,07/14] enic: Use irq_update_affinity_hint

Message ID 20210720232624.1493424-8-nitesh@redhat.com
State Superseded
Headers show
Series genirq: Cleanup the abuse of irq_set_affinity_hint() | expand

Commit Message

Nitesh Narayan Lal July 20, 2021, 11:26 p.m. UTC
The driver uses irq_set_affinity_hint() to update the affinity_hint mask
that is consumed by the userspace to distribute the interrupts. However,
under the hood irq_set_affinity_hint() also applies the provided cpumask
(if not NULL) as the affinity for the given interrupt which is an
undocumented side effect.

To remove this side effect irq_set_affinity_hint() has been marked
as deprecated and new interfaces have been introduced. Hence, replace the
irq_set_affinity_hint() with the new interface irq_update_affinity_hint()
that only updates the affinity_hint pointer.

Signed-off-by: Nitesh Narayan Lal <nitesh@redhat.com>
---
 drivers/net/ethernet/cisco/enic/enic_main.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

Comments

Christian Benvenuti (benve) Aug. 16, 2021, 5:53 p.m. UTC | #1
> -----Original Message-----
> From: Nitesh Narayan Lal <nitesh@redhat.com>
> Sent: Tuesday, July 20, 2021 4:26 PM
> To: linux-kernel@vger.kernel.org; linux-scsi@vger.kernel.org; intel-wired-
> lan@lists.osuosl.org; netdev@vger.kernel.org; linux-api@vger.kernel.org;
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> kuba@kernel.org
> Subject: [PATCH v5 07/14] enic: Use irq_update_affinity_hint
> 
> The driver uses irq_set_affinity_hint() to update the affinity_hint mask that
> is consumed by the userspace to distribute the interrupts. However, under
> the hood irq_set_affinity_hint() also applies the provided cpumask (if not
> NULL) as the affinity for the given interrupt which is an undocumented side
> effect.
> 
> To remove this side effect irq_set_affinity_hint() has been marked as
> deprecated and new interfaces have been introduced. Hence, replace the
> irq_set_affinity_hint() with the new interface irq_update_affinity_hint() that
> only updates the affinity_hint pointer.
> 
> Signed-off-by: Nitesh Narayan Lal <nitesh@redhat.com>

Thanks Nitesh for the patch.

Reviewed-by: Christian Benvenuti <benve@cisco.com>
diff mbox series

Patch

diff --git a/drivers/net/ethernet/cisco/enic/enic_main.c b/drivers/net/ethernet/cisco/enic/enic_main.c
index d0a8f7106958..97eb5bd62855 100644
--- a/drivers/net/ethernet/cisco/enic/enic_main.c
+++ b/drivers/net/ethernet/cisco/enic/enic_main.c
@@ -150,10 +150,10 @@  static void enic_set_affinity_hint(struct enic *enic)
 		    !cpumask_available(enic->msix[i].affinity_mask) ||
 		    cpumask_empty(enic->msix[i].affinity_mask))
 			continue;
-		err = irq_set_affinity_hint(enic->msix_entry[i].vector,
-					    enic->msix[i].affinity_mask);
+		err = irq_update_affinity_hint(enic->msix_entry[i].vector,
+					       enic->msix[i].affinity_mask);
 		if (err)
-			netdev_warn(enic->netdev, "irq_set_affinity_hint failed, err %d\n",
+			netdev_warn(enic->netdev, "irq_update_affinity_hint failed, err %d\n",
 				    err);
 	}
 
@@ -173,7 +173,7 @@  static void enic_unset_affinity_hint(struct enic *enic)
 	int i;
 
 	for (i = 0; i < enic->intr_count; i++)
-		irq_set_affinity_hint(enic->msix_entry[i].vector, NULL);
+		irq_update_affinity_hint(enic->msix_entry[i].vector, NULL);
 }
 
 static int enic_udp_tunnel_set_port(struct net_device *netdev,