linux-kernel - [PATCH 1/1] iommu/hyper-v: Use helper instead of directly accessing affinity

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Message-Id: <1658796820-2261-1-git-send-email-mikelley@microsoft.com>
Date:   Mon, 25 Jul 2022 17:53:40 -0700
From:   Michael Kelley <mikelley@...rosoft.com>
To:     sthemmin@...rosoft.com, kys@...rosoft.com, haiyangz@...rosoft.com,
        wei.liu@...nel.org, decui@...rosoft.com, joro@...tes.org,
        will@...nel.org, robin.murphy@....com, samuel@...lland.org,
        linux-kernel@...r.kernel.org, linux-hyperv@...r.kernel.org,
        iommu@...ts.linux.dev
Cc:     mikelley@...rosoft.com
Subject: [PATCH 1/1] iommu/hyper-v: Use helper instead of directly accessing affinity

Recent changes to solve inconsistencies in handling IRQ masks #ifdef
out the affinity field in irq_common_data for non-SMP configurations.
The current code in hyperv_irq_remapping_alloc() gets a compiler error
in that case.

Fix this by using the new irq_data_update_affinity() helper, which
handles the non-SMP case correctly.

Signed-off-by: Michael Kelley <mikelley@...rosoft.com>
---
 drivers/iommu/hyperv-iommu.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/iommu/hyperv-iommu.c b/drivers/iommu/hyperv-iommu.c
index 51bd66a..e190bb8 100644
--- a/drivers/iommu/hyperv-iommu.c
+++ b/drivers/iommu/hyperv-iommu.c
@@ -68,7 +68,6 @@ static int hyperv_irq_remapping_alloc(struct irq_domain *domain,
 {
 	struct irq_alloc_info *info = arg;
 	struct irq_data *irq_data;
-	struct irq_desc *desc;
 	int ret = 0;
 
 	if (!info || info->type != X86_IRQ_ALLOC_TYPE_IOAPIC || nr_irqs > 1)
@@ -90,8 +89,7 @@ static int hyperv_irq_remapping_alloc(struct irq_domain *domain,
 	 * Hypver-V IO APIC irq affinity should be in the scope of
 	 * ioapic_max_cpumask because no irq remapping support.
 	 */
-	desc = irq_data_to_desc(irq_data);
-	cpumask_copy(desc->irq_common_data.affinity, &ioapic_max_cpumask);
+	irq_data_update_affinity(irq_data, &ioapic_max_cpumask);
 
 	return 0;
 }
-- 
1.8.3.1