From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:51610 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727290AbeIXRzm (ORCPT ); Mon, 24 Sep 2018 13:55:42 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Will Deacon , Robin Murphy , Miao Zhong , Sasha Levin Subject: [PATCH 4.4 01/70] iommu/arm-smmu-v3: sync the OVACKFLG to PRIQ consumer register Date: Mon, 24 Sep 2018 13:52:00 +0200 Message-Id: <20180924113058.535867311@linuxfoundation.org> In-Reply-To: <20180924113058.420454070@linuxfoundation.org> References: <20180924113058.420454070@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: 4.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Miao Zhong [ 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 Cc: Robin Murphy Signed-off-by: Miao Zhong Signed-off-by: Will Deacon Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- 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 @@ -1219,6 +1219,7 @@ 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; }