Re: [PATCH v11 2/5] usb: renesas-xhci: Add the renesas xhci driver

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On Thu, Apr 30, 2020 at 08:16:41PM +0530, Vinod Koul wrote:
> > > diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
> > > index b191361257cc..c3a79f626393 100644
> > > --- a/drivers/usb/host/Makefile
> > > +++ b/drivers/usb/host/Makefile
> > > @@ -70,7 +70,8 @@ obj-$(CONFIG_USB_OHCI_HCD_DAVINCI)	+= ohci-da8xx.o
> > >  obj-$(CONFIG_USB_UHCI_HCD)	+= uhci-hcd.o
> > >  obj-$(CONFIG_USB_FHCI_HCD)	+= fhci.o
> > >  obj-$(CONFIG_USB_XHCI_HCD)	+= xhci-hcd.o
> > > -obj-$(CONFIG_USB_XHCI_PCI)	+= xhci-pci.o
> > > +usb-xhci-pci-objs		:= xhci-pci.o xhci-pci-renesas.o
> > > +obj-$(CONFIG_USB_XHCI_PCI)	+= usb-xhci-pci.o
> > 
> > I don't think it's a good idea to rename the xhci-pci module to usb-xhci-pci
> > 
> > does
> > 
> > xhci-pci-y			:= xhci-pci.o xhci-pci-renesas.o
> > obj-$(CONFIG_USB_XHCI_PCI)	+= xhci-pci.o
> > 
> > cause some kbuild issues?
> 
> Yes with this version I get the warning:
> make[4]: Circular drivers/usb/host/xhci-pci.o <- drivers/usb/host/xhci-pci.o dependency dropped.
> 
> I don't speak enough Kbuild, but I guess it does make sense that we have
> xhci-pci.o as target for both xhci-pci.o xhci-pci-renesas.o! That was
> the reason for adding usb tag to this to resolve the conflict.
> 
> I am okay for any other mechanism which can work well here. Btw what
> issues do you foresee with adding usb tag to module name.

It will break all sorts of things.  Happens every time we rename
modules, let's not do it unless we absolutely have to.

greg k-h



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