iommu/arm-smmu-v3: Use msi_get_virq()

Let the core code fiddle with the MSI descriptor retrieval.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Robin Murphy <robin.murphy@arm.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20211210221815.089008198@linutronix.de

diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
index beaf91b..6dc6d8b 100644 (file)
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
@@ -3154,7 +3154,6 @@ static void arm_smmu_write_msi_msg(struct msi_desc *desc, struct msi_msg *msg)
 
 static void arm_smmu_setup_msis(struct arm_smmu_device *smmu)
 {
-       struct msi_desc *desc;
        int ret, nvec = ARM_SMMU_MAX_MSIS;
        struct device *dev = smmu->dev;
 
@@ -3182,21 +3181,9 @@ static void arm_smmu_setup_msis(struct arm_smmu_device *smmu)
                return;
        }
 
-       for_each_msi_entry(desc, dev) {
-               switch (desc->msi_index) {
-               case EVTQ_MSI_INDEX:
-                       smmu->evtq.q.irq = desc->irq;
-                       break;
-               case GERROR_MSI_INDEX:
-                       smmu->gerr_irq = desc->irq;
-                       break;
-               case PRIQ_MSI_INDEX:
-                       smmu->priq.q.irq = desc->irq;
-                       break;
-               default:        /* Unknown */
-                       continue;
-               }
-       }
+       smmu->evtq.q.irq = msi_get_virq(dev, EVTQ_MSI_INDEX);
+       smmu->gerr_irq = msi_get_virq(dev, GERROR_MSI_INDEX);
+       smmu->priq.q.irq = msi_get_virq(dev, PRIQ_MSI_INDEX);
 
        /* Add callback to free MSIs on teardown */
        devm_add_action(dev, arm_smmu_free_msis, dev);