linux-kernel - Re: [PATCH] USB: Build usb_speed

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Date:	Mon, 20 Aug 2012 13:49:44 -0700
From:	Greg KH <gregkh@...uxfoundation.org>
To:	Alan Stern <stern@...land.harvard.edu>
Cc:	Andi Kleen <ak@...ux.intel.com>, Andi Kleen <andi@...stfloor.org>,
	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] USB: Build usb_speed_string unconditionally

On Mon, Aug 20, 2012 at 04:42:44PM -0400, Alan Stern wrote:
> On Mon, 20 Aug 2012, Andi Kleen wrote:
> 
> > On Mon, Aug 20, 2012 at 03:47:48PM -0400, Alan Stern wrote:
> > > On Mon, 20 Aug 2012, Andi Kleen wrote:
> > > 
> > > > From: Andi Kleen <ak@...ux.intel.com>
> > > > 
> > > > The usb core uses usb_speed_string(). But it's only selected
> > > > for USB_GADGET. Enable it unconditionally.
> > > 
> > > What are you talking about?  USB_COMMON isn't selected at all, but it
> > > does get built whenever USB or USB_GAGDET is enabled.  From
> > > drivers/usb/Kconfig:
> > 
> > Just trying to fix my LTO randconfigs.
> > 
> > Here's a config that violated it on rc2.
> 
> Okay, I see the problem.  Your config has:
> 
> # CONFIG_USB_SUPPORT is not set
> CONFIG_USB=m
> 
> That combination should not be possible, because in 
> drivers/usb/Kconfig, the definition of USB is inside an "if 
> USB_SUPPORT" block.
> 
> Runing "make oldconfig" shows that this happened because:
> 
> warning: (MOUSE_APPLETOUCH && MOUSE_BCM5974 && MOUSE_SYNAPTICS_USB && JOYSTICK_XPAD && TABLET_USB_ACECAD && TABLET_USB_AIPTEK && TABLET_USB_HANWANG && TABLET_USB_KBTAB && TABLET_USB_WACOM && TOUCHSCREEN_USB_COMPOSITE && INPUT_ATI_REMOTE2 && INPUT_KEYSPAN_REMOTE && INPUT_POWERMATE && INPUT_YEALINK && INPUT_CM109 && RC_ATI_REMOTE && IR_IMON && IR_MCEUSB && IR_REDRAT3 && IR_STREAMZAP && IR_IGUANA && DRM_USB) selects USB which has unmet direct dependencies (USB_SUPPORT && USB_ARCH_HAS_HCD)
> 
> The culprit is DRM_USB, and I think Greg has just accepted a patch to 
> fix it.

Yes, it's now in Linus's tree.

Andi, care to try this again with this .config on Linus's tree to see if
it all now works properly?

thanks,

greg k-h
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