4.14-stable review patch. If anyone has any objections, please let me know. ------------------ From: Miao Zhong <zhongmiao@xxxxxxxxxxxxx> [ Upstream commit 0d535967ac658966c6ade8f82b5799092f7d5441 ] When PRI queue occurs overflow, driver should update the OVACKFLG to the PRIQ consumer register, otherwise subsequent PRI requests will not be processed. Cc: Will Deacon <will.deacon@xxxxxxx> Cc: Robin Murphy <robin.murphy@xxxxxxx> Signed-off-by: Miao Zhong <zhongmiao@xxxxxxxxxxxxx> Signed-off-by: Will Deacon <will.deacon@xxxxxxx> Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/iommu/arm-smmu-v3.c | 1 + 1 file changed, 1 insertion(+) --- a/drivers/iommu/arm-smmu-v3.c +++ b/drivers/iommu/arm-smmu-v3.c @@ -1272,6 +1272,7 @@ static irqreturn_t arm_smmu_priq_thread( /* Sync our overflow flag, as we believe we're up to speed */ q->cons = Q_OVF(q, q->prod) | Q_WRP(q, q->cons) | Q_IDX(q, q->cons); + writel(q->cons, q->cons_reg); return IRQ_HANDLED; }
