From mboxrd@z Thu Jan 1 00:00:00 1970 From: Joerg Roedel Subject: [PATCH 2/2] iommu/amd: Enforce alignment for MSI IRQs Date: Fri, 6 Oct 2017 13:34:12 +0200 Message-ID: <1507289652-30166-3-git-send-email-joro@8bytes.org> References: <1507289652-30166-1-git-send-email-joro@8bytes.org> Return-path: In-Reply-To: <1507289652-30166-1-git-send-email-joro@8bytes.org> Sender: linux-kernel-owner@vger.kernel.org To: iommu@lists.linux-foundation.org Cc: Thomas Gleixner , linux-kernel@vger.kernel.org, Joerg Roedel List-Id: iommu@lists.linux-foundation.org From: Joerg Roedel Make use of the new alignment capability of alloc_irq_index() to enforce IRQ index alignment for MSI. Reported-by: Thomas Gleixner Fixes: 2b324506341cb ('iommu/amd: Add routines to manage irq remapping tables') Signed-off-by: Joerg Roedel --- drivers/iommu/amd_iommu.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) 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"); -- 2.7.4