diff options
| -rw-r--r-- | drivers/iommu/riscv/iommu.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/iommu/riscv/iommu.c b/drivers/iommu/riscv/iommu.c index 8a05def774bd..84806724f568 100644 --- a/drivers/iommu/riscv/iommu.c +++ b/drivers/iommu/riscv/iommu.c @@ -240,6 +240,12 @@ static int riscv_iommu_queue_enable(struct riscv_iommu_device *iommu, return rc; } + /* Empty queue before enabling it */ + if (queue->qid == RISCV_IOMMU_INTR_CQ) + riscv_iommu_writel(queue->iommu, Q_TAIL(queue), 0); + else + riscv_iommu_writel(queue->iommu, Q_HEAD(queue), 0); + /* * Enable queue with interrupts, clear any memory fault if any. * Wait for the hardware to acknowledge request and activate queue |