On Fri, Aug 25, 2017 at 03:16:36AM +0000, Z.q. Hou wrote: > Hi Bjorn, > > Thanks a lot for your comments! > > > -----Original Message----- > > From: Bjorn Helgaas [mailto:helgaas@xxxxxxxxxx] > > Sent: 2017年8月25日 1:12 > > To: Z.q. Hou <zhiqiang.hou@xxxxxxx> > > Cc: linux-pci@xxxxxxxxxxxxxxx; bhelgaas@xxxxxxxxxx; > > jingoohan1@xxxxxxxxx; Joao.Pinto@xxxxxxxxxxxx; M.h. Lian > > <minghuan.lian@xxxxxxx>; Mingkai Hu <mingkai.hu@xxxxxxx>; Roy Zang > > <roy.zang@xxxxxxx>; svarbanov@xxxxxxxxxx; niklas.cassel@xxxxxxxx; > > jesper.nilsson@xxxxxxxx > > Subject: Re: [PATCHv4 4/9] PCI: layerscape: refactor the host_init function > > > > On Wed, Aug 23, 2017 at 02:08:51PM +0800, Zhiqiang Hou wrote: > > > From: Hou Zhiqiang <Zhiqiang.Hou@xxxxxxx> > > > > > > Make the ls1021a's host_init reuse layerscape platform's common > > > host_init function. > > > > This patch does two things: > > > > 1) Moves ls1021_pcie_host_init() to a different place in the file > > 2) Calls ls_pcie_host_init() instead of repeating that code in > > ls1021_pcie_host_init() > > > > Those should be separate patches so they're easier to review. > > > > Or if you don't really need to move ls1021_pcie_host_init() to a different place, > > that would be even easier. > > Moved ls1021_pcie_host_init() to this place behand the func ls_pcie_host_init is to call ls_pcie_host_init without adding a declaration of it. Is it necessary to separate it? Yes, please. I want to see one patch that *only* moves the function (and mentions why you're moving it) and another that *only* calls ls_pcie_host_init() instead of repeating that code in ls1021_pcie_host_init(). That way, both patches are trivial to review. The combined one is not trivial to review. > > > Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@xxxxxxx> > > > --- > > > V4: > > > - no change > > > > > > drivers/pci/dwc/pci-layerscape.c | 65 > > > ++++++++++++++++++---------------------- > > > 1 file changed, 29 insertions(+), 36 deletions(-) > > > > > > diff --git a/drivers/pci/dwc/pci-layerscape.c > > > b/drivers/pci/dwc/pci-layerscape.c > > > index 3aa34214643c..57b86a0cd2c8 100644 > > > --- a/drivers/pci/dwc/pci-layerscape.c > > > +++ b/drivers/pci/dwc/pci-layerscape.c > > > @@ -108,42 +108,6 @@ static int ls1021_pcie_link_up(struct dw_pcie *pci) > > > return 1; > > > } > > > > > > -static int ls1021_pcie_host_init(struct pcie_port *pp) -{ > > > - struct dw_pcie *pci = to_dw_pcie_from_pp(pp); > > > - struct ls_pcie *pcie = to_ls_pcie(pci); > > > - struct device *dev = pci->dev; > > > - u32 index[2]; > > > - int ret; > > > - > > > - pcie->scfg = syscon_regmap_lookup_by_phandle(dev->of_node, > > > - "fsl,pcie-scfg"); > > > - if (IS_ERR(pcie->scfg)) { > > > - ret = PTR_ERR(pcie->scfg); > > > - dev_err(dev, "No syscfg phandle specified\n"); > > > - pcie->scfg = NULL; > > > - return ret; > > > - } > > > - > > > - if (of_property_read_u32_array(dev->of_node, > > > - "fsl,pcie-scfg", index, 2)) { > > > - pcie->scfg = NULL; > > > - return -EINVAL; > > > - } > > > - pcie->index = index[1]; > > > - > > > - dw_pcie_setup_rc(pp); > > > - > > > - iowrite32(1, pci->dbi_base + PCIE_DBI_RO_WR_EN); > > > - ls_pcie_fix_class(pcie); > > > - ls_pcie_clear_multifunction(pcie); > > > - iowrite32(0, pci->dbi_base + PCIE_DBI_RO_WR_EN); > > > - > > > - ls_pcie_drop_msg_tlp(pcie); > > > - > > > - return 0; > > > -} > > > - > > > static int ls_pcie_link_up(struct dw_pcie *pci) { > > > struct ls_pcie *pcie = to_ls_pcie(pci); @@ -176,6 +140,35 @@ static > > > int ls_pcie_host_init(struct pcie_port *pp) > > > return 0; > > > } > > > > > > +static int ls1021_pcie_host_init(struct pcie_port *pp) { > > > + struct dw_pcie *pci = to_dw_pcie_from_pp(pp); > > > + struct ls_pcie *pcie = to_ls_pcie(pci); > > > + struct device *dev = pci->dev; > > > + u32 index[2]; > > > + int ret; > > > + > > > + pcie->scfg = syscon_regmap_lookup_by_phandle(dev->of_node, > > > + "fsl,pcie-scfg"); > > > + if (IS_ERR(pcie->scfg)) { > > > + ret = PTR_ERR(pcie->scfg); > > > + dev_err(dev, "No syscfg phandle specified\n"); > > > + pcie->scfg = NULL; > > > + return ret; > > > + } > > > + > > > + if (of_property_read_u32_array(dev->of_node, > > > + "fsl,pcie-scfg", index, 2)) { > > > + pcie->scfg = NULL; > > > + return -EINVAL; > > > + } > > > + pcie->index = index[1]; > > > + > > > + ls_pcie_host_init(pp); > > > + > > > + return 0; > > > +} > > > + > > > static int ls_pcie_msi_host_init(struct pcie_port *pp, > > > struct msi_controller *chip) > > > { > > > -- > > > 2.14.1 > > > > > Thanks, > Zhiqiang >
