linux-kernel - [patch V2 31/36] perf/smmuv3: Use msi_get

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Message-ID: <20211206210439.343885841@linutronix.de>
Date:   Mon,  6 Dec 2021 23:39:45 +0100 (CET)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     LKML <linux-kernel@...r.kernel.org>
Cc:     Bjorn Helgaas <helgaas@...nel.org>, Marc Zygnier <maz@...nel.org>,
        Alex Williamson <alex.williamson@...hat.com>,
        Kevin Tian <kevin.tian@...el.com>,
        Jason Gunthorpe <jgg@...dia.com>,
        Megha Dey <megha.dey@...el.com>,
        Ashok Raj <ashok.raj@...el.com>, linux-pci@...r.kernel.org,
        Cedric Le Goater <clg@...d.org>,
        xen-devel@...ts.xenproject.org, Juergen Gross <jgross@...e.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Mark Rutland <mark.rutland@....com>,
        Will Deacon <will@...nel.org>,
        linux-arm-kernel@...ts.infradead.org,
        Santosh Shilimkar <ssantosh@...nel.org>,
        iommu@...ts.linux-foundation.org, dmaengine@...r.kernel.org,
        Stuart Yoder <stuyoder@...il.com>,
        Laurentiu Tudor <laurentiu.tudor@....com>,
        Nishanth Menon <nm@...com>, Tero Kristo <kristo@...nel.org>,
        Vinod Koul <vkoul@...nel.org>,
        Robin Murphy <robin.murphy@....com>,
        Sinan Kaya <okaya@...nel.org>
Subject: [patch V2 31/36] perf/smmuv3: Use msi_get_virq()

Let the core code fiddle with the MSI descriptor retrieval.

Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Reviewed-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Reviewed-by: Jason Gunthorpe <jgg@...dia.com>
Cc: Mark Rutland <mark.rutland@....com>
Cc: Will Deacon <will@...nel.org>
Cc: linux-arm-kernel@...ts.infradead.org
---
 drivers/perf/arm_smmuv3_pmu.c |    5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

--- a/drivers/perf/arm_smmuv3_pmu.c
+++ b/drivers/perf/arm_smmuv3_pmu.c
@@ -684,7 +684,6 @@ static void smmu_pmu_write_msi_msg(struc
 
 static void smmu_pmu_setup_msi(struct smmu_pmu *pmu)
 {
-	struct msi_desc *desc;
 	struct device *dev = pmu->dev;
 	int ret;
 
@@ -701,9 +700,7 @@ static void smmu_pmu_setup_msi(struct sm
 		return;
 	}
 
-	desc = first_msi_entry(dev);
-	if (desc)
-		pmu->irq = desc->irq;
+	pmu->irq = msi_get_virq(dev, 0);
 
 	/* Add callback to free MSIs on teardown */
 	devm_add_action(dev, smmu_pmu_free_msis, dev);