linux-kernel - [irqchip: irq/irqchip-fixes] iommu/hyper-v: Use helper instead of directly accessing affinity

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Date:   Thu, 04 Aug 2022 13:26:04 -0000
From:   "irqchip-bot for Michael Kelley" <tip-bot2@...utronix.de>
To:     linux-kernel@...r.kernel.org
Cc:     Michael Kelley <mikelley@...rosoft.com>,
        Randy Dunlap <rdunlap@...radead.org>,
        Joerg Roedel <jroedel@...e.de>, Marc Zyngier <maz@...nel.org>,
        tglx@...utronix.de
Subject: [irqchip: irq/irqchip-fixes] iommu/hyper-v: Use helper instead of
 directly accessing affinity

The following commit has been merged into the irq/irqchip-fixes branch of irqchip:

Commit-ID:     b0a4ab7ca4ce993d1cc51cbc85e9f341c729a3d4
Gitweb:        https://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms/b0a4ab7ca4ce993d1cc51cbc85e9f341c729a3d4
Author:        Michael Kelley <mikelley@...rosoft.com>
AuthorDate:    Mon, 25 Jul 2022 17:53:40 -07:00
Committer:     Marc Zyngier <maz@...nel.org>
CommitterDate: Thu, 04 Aug 2022 10:02:09 +01:00

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>
Reported-by: Randy Dunlap <rdunlap@...radead.org>
Tested-by: Randy Dunlap <rdunlap@...radead.org>
Acked-by: Randy Dunlap <rdunlap@...radead.org>
Acked-by: Joerg Roedel <jroedel@...e.de>
Signed-off-by: Marc Zyngier <maz@...nel.org>
Fixes: aa0813581b8d ("genirq: Provide an IRQ affinity mask in non-SMP configs")
Link: https://lore.kernel.org/r/1658796820-2261-1-git-send-email-mikelley@microsoft.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;
 }