linux-kernel - [PATCH v6 07/14] enic: Use irq_update_affinity

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Message-Id: <20210903152430.244937-8-nitesh@redhat.com>
Date:   Fri,  3 Sep 2021 11:24:23 -0400
From:   Nitesh Narayan Lal <nitesh@...hat.com>
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Subject: [PATCH v6 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@...hat.com>
Reviewed-by: Christian Benvenuti <benve@...co.com>
---
 drivers/net/ethernet/cisco/enic/enic_main.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

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,
-- 
2.27.0