From: Joerg Roedel <jroedel@suse.de>
Date: Fri, 6 Oct 2017 10:22:06 +0000 (+0200)
Subject: iommu/amd: Enforce alignment for MSI IRQs
X-Git-Tag: v5.15~10028^2^5~1^4
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=53b9ec3fbb7da97d13951debbd42e3a0c4a7c9f7;p=platform%2Fkernel%2Flinux-starfive.git

iommu/amd: Enforce alignment for MSI IRQs

Make use of the new alignment capability of
alloc_irq_index() to enforce IRQ index alignment
for MSI.

Reported-by: Thomas Gleixner <tglx@linutronix.de>
Fixes: 2b324506341cb ('iommu/amd: Add routines to manage irq remapping tables')
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
---

diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index 2d4ee25..cb7c531 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -4102,7 +4102,9 @@ static int irq_remapping_alloc(struct irq_domain *domain, unsigned int virq,
 		else
 			ret = -ENOMEM;
 	} else {
-		index = alloc_irq_index(devid, nr_irqs, false);
+		bool align = (info->type == X86_IRQ_ALLOC_TYPE_MSI);
+
+		index = alloc_irq_index(devid, nr_irqs, align);
 	}
 	if (index < 0) {
 		pr_warn("Failed to allocate IRTE\n");