linux-kernel - Re: [PATCH v13 3/5] usb: xhci: Add support for Renesas controller with memory

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Date:   Tue, 19 May 2020 01:27:19 +0530
From:   Vinod Koul <vkoul@...nel.org>
To:     Anders Roxell <anders.roxell@...aro.org>,
        Arnd Bergmann <arnd@...db.de>
Cc:     Mathias Nyman <mathias.nyman@...el.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-arm-msm@...r.kernel.org,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>,
        Christian Lamparter <chunkeey@...glemail.com>,
        John Stultz <john.stultz@...aro.org>,
        Alan Stern <stern@...land.harvard.edu>,
        Andreas Böhler <dev@...ehler.at>,
        linux-usb@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v13 3/5] usb: xhci: Add support for Renesas controller
 with memory

Hi Anders,

On 18-05-20, 19:53, Anders Roxell wrote:
> On Wed, 6 May 2020 at 08:01, Vinod Koul <vkoul@...nel.org> wrote:
> >
> > Some rensas controller like uPD720201 and uPD720202 need firmware to be
> > loaded. Add these devices in pci table and invoke renesas firmware loader
> > functions to check and load the firmware into device memory when
> > required.
> >
> > Signed-off-by: Vinod Koul <vkoul@...nel.org>
> 
> Hi, I got a build error when I built an arm64 allmodconfig kernel.

Thanks for this. This is happening as we have default y for USB_XHCI_PCI
and then we make USB_XHCI_PCI_RENESAS=m. That should be not allowed as
we export as symbol so both can be inbuilt or modules but USB_XHCI_PCI=y
and USB_XHCI_PCI_RENESAS=m cant. While it is valid that USB_XHCI_PCI=y|m
and USB_XHCI_PCI_RENESAS=n

So this seems to get fixed by below for me. I have tested with
 - both y and m (easy)
 - make USB_XHCI_PCI_RENESAS=n, USB_XHCI_PCI=y|m works
 - try making USB_XHCI_PCI=y and USB_XHCI_PCI_RENESAS=m, then
   USB_XHCI_PCI=m by kbuild :)
 - try making USB_XHCI_PCI=m and USB_XHCI_PCI_RENESAS=y, kbuild gives
   error prompt that it will be m due to depends

Thanks to all the fixes done by Arnd which pointed me to this. Pls
verify and I will send the fix with you as reported :)

---- >8 ----

diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index b5c542d6a1c5..92783d175b3f 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -40,11 +40,11 @@ config USB_XHCI_DBGCAP
 config USB_XHCI_PCI
        tristate
        depends on USB_PCI
+       depends on USB_XHCI_PCI_RENESAS || !USB_XHCI_PCI_RENESAS
        default y
 
 config USB_XHCI_PCI_RENESAS
        tristate "Support for additional Renesas xHCI controller with firwmare"
-       depends on USB_XHCI_PCI
        ---help---
          Say 'Y' to enable the support for the Renesas xHCI controller with
          firwmare. Make sure you have the firwmare for the device and

-- 
~Vinod