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Fri, 7 Sep 2018 00:41:25 +0000 Received: from CY4PR21MB0776.namprd21.prod.outlook.com ([fe80::7c3a:eea8:1391:1611]) by CY4PR21MB0776.namprd21.prod.outlook.com ([fe80::7c3a:eea8:1391:1611%7]) with mapi id 15.20.1143.008; Fri, 7 Sep 2018 00:41:25 +0000 From: Sasha Levin To: "stable@vger.kernel.org" , "linux-kernel@vger.kernel.org" CC: Miao Zhong , Will Deacon , Robin Murphy , Sasha Levin Subject: [PATCH AUTOSEL 4.4 02/30] iommu/arm-smmu-v3: sync the OVACKFLG to PRIQ consumer register Thread-Topic: [PATCH AUTOSEL 4.4 02/30] iommu/arm-smmu-v3: sync the OVACKFLG to PRIQ consumer register Thread-Index: AQHURkMpfUcx+iHoy0SfaFNVliXJ8w== Date: Fri, 7 Sep 2018 00:38:57 +0000 Message-ID: <20180907003853.57942-2-alexander.levin@microsoft.com> References: <20180907003853.57942-1-alexander.levin@microsoft.com> In-Reply-To: <20180907003853.57942-1-alexander.levin@microsoft.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [52.168.54.252] x-ms-publictraffictype: Email x-microsoft-exchange-diagnostics: 1;CY4PR21MB0853;6:1LD6Fd19ZP7DQuYtqmT4viCW8q+IXweEdWLLhyZH1W7VtlKT1+xEiUGIHNRLFzKg72k1drhuifsjoDRKwuf+8lQnHyt3zQinyFcuHPl8LTw7B2gN+Ne6aBl4UCLmFeK8XOE2zQD9QONbO2wtMY7fTukaKw9QXBJbAOXZbCs9KNZpfhvry5ZqptJ+a/mQI3y/2+lPZ/TttWLnvY2XrYBDWDlovJYo8IfZkxtJEsKqJwj43sPaPDVSUTyle/dEuyLX5SeXTpNSQ/4CmZlGm4VSv10nxWUlNZLG5E3Xiunxe0b+5pkwIeI9XDQoTEIVubtT4nDVrA2c1JpY8mz52Aoqup1v/ilPrNORIkfjf1hsxAf0w3QT/tdkAq39Ob64agBTe6kdqohVmo2hwL2mEwwrq01wN5dTI82HF4BnFpKhDdqe7x+7+pbzcvRblCusKSPPMtyX7TTPjgINOPNc6v3IAA==;5:uahbhTKo3O58xu6YkP0LJ6YpB8nMZsj2ArNgpg32U0iXC6IR0JIWAcssjx8R60r55ylY3cFZK+pSJn0iwXKrOe5ylyDa81xlseh6vFohCRCKeaT9DMnzhzFYjiGo8m15iWFhxShJ924zqNlj3/oEg0X9v+OMS8torbA+O3EXN+A=;7:L9oxGk13gr0pLqAYg1uuABFxqSJTNzi80IN5BOWwlVzcFJ2YezkfWSUcFQTKKhOOSyBw3alcOy7UyI8lC5166QdmvRevCDfOICOPCd0LlP+cFAVNDCjLo29fVzRCskAp90mbg5SP+GUaNuY24J7etshXsDLqYa9gaZ6UE7BevOa0ldH1F0D/fIkGpDzGEij0EnQgNiU/aWfpZJw0hv10E7YTY4OirQUSJz+d1Yn5Uf6As65pfMiGBqpMWiXM8VHQ x-ms-office365-filtering-correlation-id: 4328d328-36d1-4dc8-a741-08d6145aa465 x-ms-office365-filtering-ht: Tenant x-microsoft-antispam: BCL:0;PCL:0;RULEID:(7020095)(4652040)(8989137)(4534165)(4627221)(201703031133081)(201702281549075)(8990107)(5600074)(711020)(4618075)(2017052603328)(7193020);SRVR:CY4PR21MB0853; 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received-spf: None (protection.outlook.com: microsoft.com does not designate permitted sender hosts) x-microsoft-antispam-message-info: TkiRb/3ZT4pXTs04gCfatb/HS8B3zO9nj9anZz/eIga8oSsYa+br5C8SmceABgCHyFVPSTtIr2cL18Pa688ap32cYCqseMsRfJuzmk7BoJdOfyo9Q/LkL70jcg5OUMkuSRnAclJLVxCtLIVwXdijuKnzwVNM06gjCT/sHyCVRXav2Ra/VoXkBilXmFg7rKgnOi6Yhr8F9xHCQ7f0RMATbQDDRr1+9JcAPyYeurKvuGGQLuWzD3J4YpEeq/+EJZgUatmjyH6ByIm/OUndrbHhE5nnet3isINoZ8B7mJJRWhs7T/MCJ5k4F17F62O6kCNQDoN5IiFMUlRsnONh2ErNI/qsbS49DT9Ts5fY1GH+Ar0= spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: microsoft.com X-MS-Exchange-CrossTenant-Network-Message-Id: 4328d328-36d1-4dc8-a741-08d6145aa465 X-MS-Exchange-CrossTenant-originalarrivaltime: 07 Sep 2018 00:38:57.6000 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 72f988bf-86f1-41af-91ab-2d7cd011db47 X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY4PR21MB0853 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 --- drivers/iommu/arm-smmu-v3.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c index 347aaaa5a7ea..fc6eb752ab35 100644 --- 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(int irq, void= *dev) =20 /* Sync our overflow flag, as we believe we're up to speed */ q->cons =3D Q_OVF(q, q->prod) | Q_WRP(q, q->cons) | Q_IDX(q, q->cons); + writel(q->cons, q->cons_reg); return IRQ_HANDLED; } =20 --=20 2.17.1