linux-kernel - [PATCH v3 12/14] hinic: Use irq_set_affinity_and

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Message-Id: <20210713211502.464259-13-nitesh@redhat.com>
Date:   Tue, 13 Jul 2021 17:15:00 -0400
From:   Nitesh Narayan Lal <nitesh@...hat.com>
To:     linux-kernel@...r.kernel.org, linux-scsi@...r.kernel.org,
        intel-wired-lan@...ts.osuosl.org, netdev@...r.kernel.org,
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Subject: [PATCH v3 12/14] hinic: Use irq_set_affinity_and_hint

The driver uses irq_set_affinity_hint() to:

- Set the affinity_hint which is consumed by the userspace for
  distributing the interrupts

- Enforce affinity

As per commit 352f58b0d9f2 ("net-next/hinic: Set Rxq irq to specific cpu
for NUMA"), the hinic driver enforces its own affinity to bind IRQs to the
local NUMA node. However, irq_set_affinity_hint() applying the provided
cpumask as an affinity for the interrupt 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_set_affinity_and_hint()
where the provided mask needs to be applied as the affinity and
affinity_hint pointer needs to be set and replace with
irq_update_affinity_hint() where only affinity_hint needs to be updated.

Signed-off-by: Nitesh Narayan Lal <nitesh@...hat.com>
---
 drivers/net/ethernet/huawei/hinic/hinic_rx.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/huawei/hinic/hinic_rx.c b/drivers/net/ethernet/huawei/hinic/hinic_rx.c
index fed3b6bc0d76..b33ed4d92b71 100644
--- a/drivers/net/ethernet/huawei/hinic/hinic_rx.c
+++ b/drivers/net/ethernet/huawei/hinic/hinic_rx.c
@@ -548,7 +548,7 @@ static int rx_request_irq(struct hinic_rxq *rxq)
 		goto err_req_irq;
 
 	cpumask_set_cpu(qp->q_id % num_online_cpus(), &rq->affinity_mask);
-	err = irq_set_affinity_hint(rq->irq, &rq->affinity_mask);
+	err = irq_set_affinity_and_hint(rq->irq, &rq->affinity_mask);
 	if (err)
 		goto err_irq_affinity;
 
@@ -565,7 +565,7 @@ static void rx_free_irq(struct hinic_rxq *rxq)
 {
 	struct hinic_rq *rq = rxq->rq;
 
-	irq_set_affinity_hint(rq->irq, NULL);
+	irq_update_affinity_hint(rq->irq, NULL);
 	free_irq(rq->irq, rxq);
 	rx_del_napi(rxq);
 }
-- 
2.27.0