perf/smmuv3: Use msi_get_virq()

Let the core code fiddle with the MSI descriptor retrieval.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20211210221815.029143589@linutronix.de

diff --git a/drivers/perf/arm_smmuv3_pmu.c b/drivers/perf/arm_smmuv3_pmu.c
index 2263488..fdbc3ec 100644 (file)
--- 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(struct msi_desc *desc, struct msi_msg *msg)
 
 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 smmu_pmu *pmu)
                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);