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Received: from BN8PR12MB2900.namprd12.prod.outlook.com (2603:10b6:408:69::18) by DM6PR12MB5023.namprd12.prod.outlook.com (2603:10b6:5:1b6::15) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.5144.29; Mon, 11 Apr 2022 11:33:24 +0000 Received: from BN8PR12MB2900.namprd12.prod.outlook.com ([fe80::f917:a955:6b35:6425]) by BN8PR12MB2900.namprd12.prod.outlook.com ([fe80::f917:a955:6b35:6425%6]) with mapi id 15.20.5144.029; Mon, 11 Apr 2022 11:33:24 +0000 Message-ID: <32856498-0675-ac5d-81f7-9c2ddb728c50@nvidia.com> Date: Mon, 11 Apr 2022 17:03:12 +0530 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:91.0) Gecko/20100101 Thunderbird/91.3.2 Subject: Re: [PATCH] PCI: tegra194: Remove unnecessary MSI enable reg save and restore Content-Language: en-US To: Lorenzo Pieralisi , Jisheng Zhang Cc: Rob Herring , =?UTF-8?Q?Krzysztof_Wilczy=c5=84ski?= , Bjorn Helgaas , Thierry Reding , Jonathan Hunter , linux-pci@vger.kernel.org, linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org References: <20211226074910.2722-1-jszhang@kernel.org> From: Vidya Sagar In-Reply-To: Content-Type: text/plain; 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Looks good to me. I couldn't verify it on Nvidia platform as we are facing some issue with suspend/resume sequence. I'll verify and update as soon as I could get suspend/resume working. Acked-by: Vidya Sagar - Vidya Sagar > > Lorenzo > >> diff --git a/drivers/pci/controller/dwc/pcie-tegra194.c b/drivers/pci/controller/dwc/pcie-tegra194.c >> index 904976913081..678898985319 100644 >> --- a/drivers/pci/controller/dwc/pcie-tegra194.c >> +++ b/drivers/pci/controller/dwc/pcie-tegra194.c >> @@ -186,8 +186,6 @@ >> #define N_FTS_VAL 52 >> #define FTS_VAL 52 >> >> -#define PORT_LOGIC_MSI_CTRL_INT_0_EN 0x828 >> - >> #define GEN3_EQ_CONTROL_OFF 0x8a8 >> #define GEN3_EQ_CONTROL_OFF_PSET_REQ_VEC_SHIFT 8 >> #define GEN3_EQ_CONTROL_OFF_PSET_REQ_VEC_MASK GENMASK(23, 8) >> @@ -2189,9 +2187,6 @@ static int tegra_pcie_dw_suspend_noirq(struct device *dev) >> if (!pcie->link_state) >> return 0; >> >> - /* Save MSI interrupt vector */ >> - pcie->msi_ctrl_int = dw_pcie_readl_dbi(&pcie->pci, >> - PORT_LOGIC_MSI_CTRL_INT_0_EN); >> tegra_pcie_downstream_dev_to_D0(pcie); >> tegra_pcie_dw_pme_turnoff(pcie); >> tegra_pcie_unconfig_controller(pcie); >> @@ -2223,10 +2218,6 @@ static int tegra_pcie_dw_resume_noirq(struct device *dev) >> if (ret < 0) >> goto fail_host_init; >> >> - /* Restore MSI interrupt vector */ >> - dw_pcie_writel_dbi(&pcie->pci, PORT_LOGIC_MSI_CTRL_INT_0_EN, >> - pcie->msi_ctrl_int); >> - >> return 0; >> >> fail_host_init: >> -- >> 2.34.1 >>