From mboxrd@z Thu Jan 1 00:00:00 1970 From: Honghui Zhang Subject: Re: [PATCH v5 4/9] PCI: mediatek: Convert to use pci_host_probe() Date: Sat, 29 Sep 2018 08:16:45 +0800 Message-ID: <1538180205.14753.20.camel@mhfsdcap03> References: <1538129080-8206-1-git-send-email-honghui.zhang@mediatek.com> <1538129080-8206-5-git-send-email-honghui.zhang@mediatek.com> <1538149277.23182.7.camel@mtkswgap22> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1538149277.23182.7.camel@mtkswgap22> Sender: linux-kernel-owner@vger.kernel.org To: Ryder Lee Cc: lorenzo.pieralisi@arm.com, bhelgaas@google.com, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, ulf.hansson@linaro.org, marc.zyngier@arm.com, matthias.bgg@gmail.com, devicetree@vger.kernel.org, yingjoe.chen@mediatek.com, eddie.huang@mediatek.com, youlin.pei@mediatek.com, yt.shen@mediatek.com, sean.wang@mediatek.com List-Id: devicetree@vger.kernel.org On Fri, 2018-09-28 at 23:41 +0800, Ryder Lee wrote: > On Fri, 2018-09-28 at 18:04 +0800, honghui.zhang@mediatek.com wrote: > > From: Honghui Zhang > > > > Part of mtk_pcie_register_host is an open-coded version of > > pci_host_probe(). So instead of duplicating this code, use > > pci_host_probe() directly and remove mtk_pcie_register_host. > > > > Signed-off-by: Honghui Zhang > > --- > > drivers/pci/controller/pcie-mediatek.c | 37 ++++++++-------------------------- > > 1 file changed, 8 insertions(+), 29 deletions(-) > > > > diff --git a/drivers/pci/controller/pcie-mediatek.c b/drivers/pci/controller/pcie-mediatek.c > > index e2c4127..cbf4543 100644 > > --- a/drivers/pci/controller/pcie-mediatek.c > > +++ b/drivers/pci/controller/pcie-mediatek.c > > @@ -1125,34 +1125,6 @@ static int mtk_pcie_request_resources(struct mtk_pcie *pcie) > > return 0; > > } > > > > -static int mtk_pcie_register_host(struct pci_host_bridge *host) > > -{ > > - struct mtk_pcie *pcie = pci_host_bridge_priv(host); > > - struct pci_bus *child; > > - int err; > > To make the patch simple, could we keep these host->*. and return > pci_host_probe() directly? Well, I guess it's not necessary to keep the mtk_pcie_register_host just wrap pci_host_probe(). Put those host->* directly in probe function is no harm, it will reduce one function call and related parameter passing. I may update this patch to keep the mtk_pcie_register_host if you insist though I prefer the current way. Thanks. > > > - host->busnr = pcie->busn.start; > > - host->dev.parent = pcie->dev; > > - host->ops = pcie->soc->ops; > > - host->map_irq = of_irq_parse_and_map_pci; > > - host->swizzle_irq = pci_common_swizzle; > > - host->sysdata = pcie; > > - > > - err = pci_scan_root_bus_bridge(host); > > - if (err < 0) > > - return err; > > - > > - pci_bus_size_bridges(host->bus); > > - pci_bus_assign_resources(host->bus); > > - > > - list_for_each_entry(child, &host->bus->children, node) > > - pcie_bus_configure_settings(child); > > - > > - pci_bus_add_devices(host->bus); > > - > > - return 0; > > -} > > - > > static int mtk_pcie_probe(struct platform_device *pdev) > > { > > struct device *dev = &pdev->dev; > > @@ -1179,7 +1151,14 @@ static int mtk_pcie_probe(struct platform_device *pdev) > > if (err) > > goto put_resources; > > > > - err = mtk_pcie_register_host(host); > > + host->busnr = pcie->busn.start; > > + host->dev.parent = pcie->dev; > > + host->ops = pcie->soc->ops; > > + host->map_irq = of_irq_parse_and_map_pci; > > + host->swizzle_irq = pci_common_swizzle; > > + host->sysdata = pcie; > > + > > + err = pci_host_probe(host); > > if (err) > > goto put_resources; > > > >