| Message ID | 1372198798-17829-1-git-send-email-kamal@canonical.com |
|---|---|
| State | New |
| Headers | show |
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index 6202782..409b171 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -703,6 +703,9 @@ static void iommu_poll_events(struct amd_iommu *iommu) u32 head, tail, status; unsigned long flags; + /* enable event interrupts again */ + writel(MMIO_STATUS_EVT_INT_MASK, iommu->mmio_base + MMIO_STATUS_OFFSET); + spin_lock_irqsave(&iommu->lock, flags); /* enable event interrupts again */
This is a note to let you know that I have just added a patch titled iommu/amd: Re-enable IOMMU event log interrupt after handling. to the linux-3.8.y-queue branch of the 3.8.y.z extended stable tree which can be found at: http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.8.y-queue This patch is scheduled to be released in version 3.8.13.4. If you, or anyone else, feels it should not be added to this tree, please reply to this email. For more information about the 3.8.y.z tree, see https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable Thanks. -Kamal ------ From fc121eade275ba35f0a474e31b5686ede7e9461e Mon Sep 17 00:00:00 2001 From: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com> Date: Wed, 27 Mar 2013 18:51:52 -0500 Subject: iommu/amd: Re-enable IOMMU event log interrupt after handling. commit 925fe08bce38d1ff052fe2209b9e2b8d5fbb7f98 upstream. Current driver does not clear the IOMMU event log interrupt bit in the IOMMU status register after processing an interrupt. This causes the IOMMU hardware to generate event log interrupt only once. This has been observed in both IOMMU v1 and V2 hardware. This patch clears the bit by writing 1 to bit 1 of the IOMMU status register (MMIO Offset 2020h) Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com> Signed-off-by: Joerg Roedel <joro@8bytes.org> Signed-off-by: Kamal Mostafa <kamal@canonical.com> --- drivers/iommu/amd_iommu.c | 3 +++ 1 file changed, 3 insertions(+) -- 1.8.1.2