linux-kernel - [PATCH v3 06/14] RDMA/irdma: Use irq_set_affinity_and

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Message-Id: <20210713211502.464259-7-nitesh@redhat.com>
Date:   Tue, 13 Jul 2021 17:14:54 -0400
From:   Nitesh Narayan Lal <nitesh@...hat.com>
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        intel-wired-lan@...ts.osuosl.org, netdev@...r.kernel.org,
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Subject: [PATCH v3 06/14] RDMA/irdma: Use irq_set_affinity_and_hint

The driver uses irq_set_affinity_hint() to update the affinity_hint mask
that is consumed by the userspace to distribute the interrupts and to apply
the provided mask as the affinity for its interrupts. 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/infiniband/hw/irdma/hw.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/infiniband/hw/irdma/hw.c b/drivers/infiniband/hw/irdma/hw.c
index 7afb8a6a0526..7f13a051d4de 100644
--- a/drivers/infiniband/hw/irdma/hw.c
+++ b/drivers/infiniband/hw/irdma/hw.c
@@ -537,7 +537,7 @@ static void irdma_destroy_irq(struct irdma_pci_f *rf,
 	struct irdma_sc_dev *dev = &rf->sc_dev;
 
 	dev->irq_ops->irdma_dis_irq(dev, msix_vec->idx);
-	irq_set_affinity_hint(msix_vec->irq, NULL);
+	irq_update_affinity_hint(msix_vec->irq, NULL);
 	free_irq(msix_vec->irq, dev_id);
 }
 
@@ -1087,7 +1087,7 @@ irdma_cfg_ceq_vector(struct irdma_pci_f *rf, struct irdma_ceq *iwceq,
 	}
 	cpumask_clear(&msix_vec->mask);
 	cpumask_set_cpu(msix_vec->cpu_affinity, &msix_vec->mask);
-	irq_set_affinity_hint(msix_vec->irq, &msix_vec->mask);
+	irq_set_affinity_and_hint(msix_vec->irq, &msix_vec->mask);
 	if (status) {
 		ibdev_dbg(&rf->iwdev->ibdev, "ERR: ceq irq config fail\n");
 		return IRDMA_ERR_CFG;
-- 
2.27.0