linux-kernel - Re: linux-next: build failure after merge of the usb tree

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Date:   Mon, 16 Mar 2020 14:44:27 +0100
From:   Thierry Reding <thierry.reding@...il.com>
To:     Greg KH <greg@...ah.com>
Cc:     Stephen Rothwell <sfr@...b.auug.org.au>,
        Colin Cross <ccross@...roid.com>,
        Olof Johansson <olof@...om.net>,
        Thierry Reding <treding@...dia.com>,
        Linux Next Mailing List <linux-next@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Nagarjuna Kristam <nkristam@...dia.com>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>
Subject: Re: linux-next: build failure after merge of the usb tree

On Mon, Mar 16, 2020 at 02:28:50PM +0100, Greg KH wrote:
> On Mon, Mar 16, 2020 at 12:30:12PM +0100, Thierry Reding wrote:
> > On Mon, Mar 16, 2020 at 02:10:04PM +1100, Stephen Rothwell wrote:
> > > Hi all,
> > > 
> > > After merging the usb tree, today's linux-next build (arm
> > > multi_v7_defconfig) failed like this:
> > > 
> > > drivers/phy/tegra/xusb.c: In function 'tegra_xusb_setup_usb_role_switch':
> > > drivers/phy/tegra/xusb.c:641:10: error: initialization of 'int (*)(struct usb_role_switch *, enum usb_role)' from incompatible pointer type 'int (*)(struct device *, enum usb_role)' [-Werror=incompatible-pointer-types]
> > >   641 |   .set = tegra_xusb_role_sw_set,
> > >       |          ^~~~~~~~~~~~~~~~~~~~~~
> > > drivers/phy/tegra/xusb.c:641:10: note: (near initialization for 'role_sx_desc.set')
> > > 
> > > Caused by commit
> > > 
> > >   bce3052f0c16 ("usb: roles: Provide the switch drivers handle to the switch in the API")
> > > 
> > > interacting with commit
> > > 
> > >   5a00c7c7604f ("phy: tegra: xusb: Add usb-role-switch support")
> > > 
> > > from the tegra tree.
> > > 
> > > I have added this merge fix patch (which may need more work):
> > > 
> > > From: Stephen Rothwell <sfr@...b.auug.org.au>
> > > Date: Mon, 16 Mar 2020 14:04:20 +1100
> > > Subject: [PATCH] phy: tegra: fix up for set_role API change
> > > 
> > > Signed-off-by: Stephen Rothwell <sfr@...b.auug.org.au>
> > > ---
> > >  drivers/phy/tegra/xusb.c | 7 ++++---
> > >  1 file changed, 4 insertions(+), 3 deletions(-)
> > > 
> > > diff --git a/drivers/phy/tegra/xusb.c b/drivers/phy/tegra/xusb.c
> > > index d907f03bf282..25223c350e66 100644
> > > --- a/drivers/phy/tegra/xusb.c
> > > +++ b/drivers/phy/tegra/xusb.c
> > > @@ -596,11 +596,12 @@ static void tegra_xusb_usb_phy_work(struct work_struct *work)
> > >  	atomic_notifier_call_chain(&port->usb_phy.notifier, 0, &port->usb_phy);
> > >  }
> > >  
> > > -static int tegra_xusb_role_sw_set(struct device *dev, enum usb_role role)
> > > +static int tegra_xusb_role_sw_set(struct usb_role_switch *sw,
> > > +				  enum usb_role role)
> > >  {
> > > -	struct tegra_xusb_port *port = dev_get_drvdata(dev);
> > > +	struct tegra_xusb_port *port = usb_role_switch_get_drvdata(sw);
> > >  
> > > -	dev_dbg(dev, "%s(): role %s\n", __func__, usb_roles[role]);
> > > +	dev_dbg(&port->dev, "%s(): role %s\n", __func__, usb_roles[role]);
> > >  
> > >  	schedule_work(&port->usb_phy_work);
> > >  
> > > -- 
> > > 2.25.0
> > 
> > I can rebase the branch that contains this commit on top of Greg's USB
> > tree. These are a dependency for the UDC and host driver changes that I
> > have sent as a pull request to Greg, so this should all work out nicely.
> 
> Ok, should I take your pull request then, or not?

Let me rebase things first and I'll send an updated pull request. Please
ignore the one I sent on Friday.

> > Greg, I recall that you've said in the past that you don't rebase your
> > trees. Is that still the case for the USB tree? Do you have a preference
> > what to base my branch on? The earliest of your USB tree that contains
> > all patches needed to make this compile? Or the latest?
> 
> Yes, I do not rebase my tree.  Please work off of the usb-next branch,
> and you can send me a pull request based anywhere, it should work just
> fine :)

Great, will do.

Thanks,
Thierry

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