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So that IOMMU can write new log without waiting for driver to complete processing all event logs. Signed-off-by: Vasant Hegde Reviewed-by: Suravee Suthikulpanit --- 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 dbe838828efe..e13e401c52de 100644 --- a/drivers/iommu/amd/iommu.c +++ b/drivers/iommu/amd/iommu.c @@ -825,10 +825,12 @@ static void iommu_poll_events(struct amd_iommu *iommu) while (head != tail) { iommu_print_event(iommu, iommu->evt_buf + head); + + /* Update head pointer of hardware ring-buffer */ head = (head + EVENT_ENTRY_SIZE) % EVT_BUFFER_SIZE; + writel(head, iommu->mmio_base + MMIO_EVT_HEAD_OFFSET); } - writel(head, iommu->mmio_base + MMIO_EVT_HEAD_OFFSET); } #ifdef CONFIG_IRQ_REMAP -- 2.31.1