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Message-ID: <1264180693-27197-5-git-send-email-joerg.roedel@amd.com> Date: Fri, 22 Jan 2010 18:18:12 +0100 From: Joerg Roedel <joerg.roedel@....com> To: Ingo Molnar <mingo@...hat.com> CC: x86@...nel.org, linux-kernel@...r.kernel.org, iommu@...ts.linux-foundation.org, Joerg Roedel <joerg.roedel@....com>, stable@...nel.org Subject: [PATCH 4/5] x86/amd-iommu: Fix deassignment of a device from the pt_domain Deassigning a device from the passthrough domain does not work and breaks device assignment to kvm guests. This patch fixes the issue. Cc: stable@...nel.org Signed-off-by: Joerg Roedel <joerg.roedel@....com> --- arch/x86/kernel/amd_iommu.c | 6 ++++-- 1 files changed, 4 insertions(+), 2 deletions(-) diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c index 751ce73..adb0ba0 100644 --- a/arch/x86/kernel/amd_iommu.c +++ b/arch/x86/kernel/amd_iommu.c @@ -1511,9 +1511,11 @@ static void __detach_device(struct device *dev) /* * If we run in passthrough mode the device must be assigned to the - * passthrough domain if it is detached from any other domain + * passthrough domain if it is detached from any other domain. + * Make sure we can deassign from the pt_domain itself. */ - if (iommu_pass_through && dev_data->domain == NULL) + if (iommu_pass_through && + (dev_data->domain == NULL && domain != pt_domain)) __attach_device(dev, pt_domain); } -- 1.6.6 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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