linux-kernel - [PATCH v5 12/14] hinic: Use irq_set_affinity_and

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20210720232624.1493424-13-nitesh@redhat.com>
Date:   Tue, 20 Jul 2021 19:26:22 -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,
        linux-api@...r.kernel.org, linux-pci@...r.kernel.org,
        tglx@...utronix.de, jesse.brandeburg@...el.com,
        robin.murphy@....com, mtosatti@...hat.com, mingo@...nel.org,
        jbrandeb@...nel.org, frederic@...nel.org, juri.lelli@...hat.com,
        abelits@...vell.com, bhelgaas@...gle.com, rostedt@...dmis.org,
        peterz@...radead.org, davem@...emloft.net,
        akpm@...ux-foundation.org, sfr@...b.auug.org.au,
        stephen@...workplumber.org, rppt@...ux.vnet.ibm.com,
        chris.friesen@...driver.com, maz@...nel.org, nhorman@...driver.com,
        pjwaskiewicz@...il.com, sassmann@...hat.com, thenzl@...hat.com,
        kashyap.desai@...adcom.com, sumit.saxena@...adcom.com,
        shivasharan.srikanteshwara@...adcom.com,
        sathya.prakash@...adcom.com, sreekanth.reddy@...adcom.com,
        suganath-prabu.subramani@...adcom.com, james.smart@...adcom.com,
        dick.kennedy@...adcom.com, jkc@...hat.com, faisal.latif@...el.com,
        shiraz.saleem@...el.com, tariqt@...dia.com, ahleihel@...hat.com,
        kheib@...hat.com, borisp@...dia.com, saeedm@...dia.com,
        benve@...co.com, govind@....com, jassisinghbrar@...il.com,
        ajit.khaparde@...adcom.com, sriharsha.basavapatna@...adcom.com,
        somnath.kotur@...adcom.com, nilal@...hat.com,
        tatyana.e.nikolova@...el.com, mustafa.ismail@...el.com,
        ahs3@...hat.com, leonro@...dia.com,
        chandrakanth.patil@...adcom.com, bjorn.andersson@...aro.org,
        chunkuang.hu@...nel.org, yongqiang.niu@...iatek.com,
        baolin.wang7@...il.com, poros@...hat.com, minlei@...hat.com,
        emilne@...hat.com, jejb@...ux.ibm.com, martin.petersen@...cle.com,
        _govind@....com, kabel@...nel.org, viresh.kumar@...aro.org,
        Tushar.Khandelwal@....com, kuba@...nel.org
Subject: [PATCH v5 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