linux-kernel - [tip: irq/core] ixgbe: Use irq_update_affinity

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Message-ID: <163916604572.23020.11489515087571994461.tip-bot2@tip-bot2>
Date:   Fri, 10 Dec 2021 19:54:05 -0000
From:   "tip-bot2 for Nitesh Narayan Lal" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Nitesh Narayan Lal <nitesh@...hat.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Jesse Brandeburg <jesse.brandeburg@...el.com>, x86@...nel.org,
        linux-kernel@...r.kernel.org, maz@...nel.org
Subject: [tip: irq/core] ixgbe: Use irq_update_affinity_hint()

The following commit has been merged into the irq/core branch of tip:

Commit-ID:     cc493264c01d055742a34cfbaecaffb258dcc58c
Gitweb:        https://git.kernel.org/tip/cc493264c01d055742a34cfbaecaffb258dcc58c
Author:        Nitesh Narayan Lal <nitesh@...hat.com>
AuthorDate:    Fri, 03 Sep 2021 11:24:25 -04:00
Committer:     Thomas Gleixner <tglx@...utronix.de>
CommitterDate: Fri, 10 Dec 2021 20:47:39 +01:00

ixgbe: 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>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Acked-by: Jesse Brandeburg <jesse.brandeburg@...el.com>
Link: https://lore.kernel.org/r/20210903152430.244937-10-nitesh@redhat.com

---
 drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index 0f9f022..66068e1 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -3247,8 +3247,8 @@ static int ixgbe_request_msix_irqs(struct ixgbe_adapter *adapter)
 		/* If Flow Director is enabled, set interrupt affinity */
 		if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
 			/* assign the mask for this irq */
-			irq_set_affinity_hint(entry->vector,
-					      &q_vector->affinity_mask);
+			irq_update_affinity_hint(entry->vector,
+						 &q_vector->affinity_mask);
 		}
 	}
 
@@ -3264,8 +3264,8 @@ static int ixgbe_request_msix_irqs(struct ixgbe_adapter *adapter)
 free_queue_irqs:
 	while (vector) {
 		vector--;
-		irq_set_affinity_hint(adapter->msix_entries[vector].vector,
-				      NULL);
+		irq_update_affinity_hint(adapter->msix_entries[vector].vector,
+					 NULL);
 		free_irq(adapter->msix_entries[vector].vector,
 			 adapter->q_vector[vector]);
 	}
@@ -3398,7 +3398,7 @@ static void ixgbe_free_irq(struct ixgbe_adapter *adapter)
 			continue;
 
 		/* clear the affinity_mask in the IRQ descriptor */
-		irq_set_affinity_hint(entry->vector, NULL);
+		irq_update_affinity_hint(entry->vector, NULL);
 
 		free_irq(entry->vector, q_vector);
 	}