From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Return-Path: Message-ID: <1502673155.7754.1.camel@mhfsdcap03> Subject: Re: [PATCH] PCI: mediatek: add msi support for mt2712 and mt7622 From: honghui.zhang To: Ryder Lee In-Reply-To: <1502499441.31707.6.camel@mtkswgap22> References: <1502454469-29230-1-git-send-email-honghui.zhang@mediatek.com> <1502499441.31707.6.camel@mtkswgap22> Date: Mon, 14 Aug 2017 09:12:35 +0800 MIME-Version: 1.0 List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: youlin.pei@mediatek.com, devicetree@vger.kernel.org, hongkun.cao@mediatek.com, yt.shen@mediatek.com, linux-pci@vger.kernel.org, sean.wang@mediatek.com, xinping.qian@mediatek.com, linux-kernel@vger.kernel.org, matthias.bgg@gmail.com, linux-mediatek@lists.infradead.org, yong.wu@mediatek.com, bhelgaas@google.com, yingjoe.chen@mediatek.com, eddie.huang@mediatek.com, linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+bjorn=helgaas.com@lists.infradead.org List-ID: On Sat, 2017-08-12 at 08:57 +0800, Ryder Lee wrote: > Hi Honghui, > > On Fri, 2017-08-11 at 20:27 +0800, honghui.zhang@mediatek.com wrote: > ... > > +static void mtk_pcie_enable_msi(struct mtk_pcie_port *port) > > +{ > > + u32 val; > > + > > + val = lower_32_bits((u64)(port->base + PCIE_MSI_VECTOR)); > > + writel(val, port->base + PCIE_IMSI_ADDR); > > + > > + val = readl(port->base + PCIE_INT_MASK); > > + val &= ~MSI_MASK; > > + writel(val, port->base + PCIE_INT_MASK); > > +} > > + > > static int mtk_pcie_intx_map(struct irq_domain *domain, unsigned int irq, > > irq_hw_number_t hwirq) > > { > > @@ -460,6 +574,18 @@ static int mtk_pcie_init_irq_domain(struct mtk_pcie_port *port, > > return PTR_ERR(port->irq_domain); > > } > > > > + /* Setup MSI */ > > + if (IS_ENABLED(CONFIG_PCI_MSI)) { > > + port->msi_domain = irq_domain_add_linear(node, MTK_MSI_IRQS_NUM, > > + &msi_domain_ops, > > + &mtk_pcie_msi_chip); > > + if (!port->msi_domain) { > > + dev_err(dev, "Failed to get a MSI IRQ domain\n"); > > + return PTR_ERR(port->msi_domain); > > Just return -ENOMEM. PTR_ERR(NULL) will cause a static checker warning. I will fix this in the next version. Thanks. > > > + } > > + mtk_pcie_enable_msi(port); > > + } > > + > > return 0; > > } > > Ryder > _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel