Commit bd08974f authored Jul 23, 2018 by Miao Zhong Committed by Greg Kroah-Hartman Sep 26, 2018

iommu/arm-smmu-v3: sync the OVACKFLG to PRIQ consumer register



[ 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@arm.com>
Cc: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Miao Zhong <zhongmiao@hisilicon.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent 6d1659b3

drivers/iommu/arm-smmu-v3.c

+1 −0

Original line number	Original line	Diff line number	Diff line
	@@ -1233,6 +1233,7 @@ static irqreturn_t arm_smmu_priq_thread(int irq, void *dev)

	/* Sync our overflow flag, as we believe we're up to speed */		/* 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);		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;		return IRQ_HANDLED;
	}		}