| Message ID | 20180711065724.128299-2-songxiaowei@hisilicon.com (mailing list archive) |
|---|---|
| State | New, archived |
| Delegated to: | Bjorn Helgaas |
| Headers | show |
On Wed, Jul 11, 2018 at 9:57 AM, Xiaowei Song <songxiaowei@hisilicon.com> wrote: > Add support for MSI > +static int kirin_pcie_add_msi(struct dw_pcie *pci, > + struct platform_device *pdev) > +{ > + int ret = 0; > + > + if (IS_ENABLED(CONFIG_PCI_MSI)) { > + ret = platform_get_irq(pdev, 0); > + if (ret < 0) { > + dev_err(&pdev->dev, > + "failed to get MSI IRQ (%d)\n", ret); > + return ret; > + } > + > + pci->pp.msi_irq = ret; > + } > + > + return ret; > +} Like someone already noticed, is it really IRQ number you would like to return? If you rewrite like int irq; if (IS_ENABLED(...)) { irq = ... if (irq < 0) return irq; ... = irq; } return 0; It would be slightly more explicit what you do and what you return.
> -----邮件原件----- > 发件人: Andy Shevchenko [mailto:andy.shevchenko@gmail.com] > 发送时间: 2018年7月11日 15:23 > 收件人: Songxiaowei (Kirin_DRV) <songxiaowei@hisilicon.com> > 抄送: Wangbinghui <wangbinghui@hisilicon.com>; Bjorn Helgaas > <bhelgaas@google.com>; Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>; > Rob Herring <robh+dt@kernel.org>; linux-pci@vger.kernel.org; Linux Kernel > Mailing List <linux-kernel@vger.kernel.org>; Suzhuangluan > <suzhuangluan@hisilicon.com>; Kongfei <kongfei@hisilicon.com>; chenyao > (F) <chenyao11@huawei.com> > 主题: Re: [PATCH v6 1/1] PCI: kirin: Add MSI support > > On Wed, Jul 11, 2018 at 9:57 AM, Xiaowei Song <songxiaowei@hisilicon.com> > wrote: > > Add support for MSI > > > +static int kirin_pcie_add_msi(struct dw_pcie *pci, > > + struct platform_device *pdev) { > > + int ret = 0; > > + > > + if (IS_ENABLED(CONFIG_PCI_MSI)) { > > + ret = platform_get_irq(pdev, 0); > > + if (ret < 0) { > > + dev_err(&pdev->dev, > > + "failed to get MSI IRQ (%d)\n", ret); > > + return ret; > > + } > > + > > + pci->pp.msi_irq = ret; > > + } > > + > > + return ret; > > +} > > Like someone already noticed, is it really IRQ number you would like to > return? > > If you rewrite like > > int irq; > > if (IS_ENABLED(...)) { > irq = ... > if (irq < 0) > return irq; > > ... = irq; > > } > > return 0; > > It would be slightly more explicit what you do and what you return. > Hi Andy I think did not get Lorenzo's meaning before, thank you so much, and I'll modify the patch as soon as possible. Best Regards, Xiaowei Song. > -- > With Best Regards, > Andy Shevchenko
diff --git a/drivers/pci/dwc/pcie-kirin.c b/drivers/pci/dwc/pcie-kirin.c index d2970a009eb5..369bf87d2fff 100644 --- a/drivers/pci/dwc/pcie-kirin.c +++ b/drivers/pci/dwc/pcie-kirin.c @@ -430,6 +430,9 @@ static int kirin_pcie_host_init(struct pcie_port *pp) { kirin_pcie_establish_link(pp); + if (IS_ENABLED(CONFIG_PCI_MSI)) + dw_pcie_msi_init(pp); + return 0; } @@ -445,9 +448,34 @@ static const struct dw_pcie_host_ops kirin_pcie_host_ops = { .host_init = kirin_pcie_host_init, }; +static int kirin_pcie_add_msi(struct dw_pcie *pci, + struct platform_device *pdev) +{ + int ret = 0; + + if (IS_ENABLED(CONFIG_PCI_MSI)) { + ret = platform_get_irq(pdev, 0); + if (ret < 0) { + dev_err(&pdev->dev, + "failed to get MSI IRQ (%d)\n", ret); + return ret; + } + + pci->pp.msi_irq = ret; + } + + return ret; +} + static int __init kirin_add_pcie_port(struct dw_pcie *pci, struct platform_device *pdev) { + int ret; + + ret = kirin_pcie_add_msi(pci, pdev); + if (ret < 0) + return ret; + pci->pp.ops = &kirin_pcie_host_ops; return dw_pcie_host_init(&pci->pp);