linux-kernel - Re: Fwd: [PATCH] Fix some ARM builds due to HID brokenness

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Date:	Fri, 12 Jan 2007 21:42:16 +0000
From:	Russell King <rmk+lkml@....linux.org.uk>
To:	Andrew Morton <akpm@...l.org>,
	Linux Kernel List <linux-kernel@...r.kernel.org>,
	jkosina@...e.cz, linux-input@...ey.karlin.mff.cuni.cz,
	Adrian Bunk <bunk@...sta.de>
Subject: Re: Fwd: [PATCH] Fix some ARM builds due to HID brokenness

On Fri, Jan 12, 2007 at 09:00:15PM +0000, Russell King wrote:
> Could we please have this (or a proper fix) in before 2.6.20 to resolve
> the regression please?

Actually, this remaining regression is not caused by this patch not being
integrated, but this:

config USB_HID
        tristate "USB Human Interface Device (full HID) support"
        default y
        depends on USB
        select HID

So... we have USB_HID _newly_ selected in configurations which didn't
have it before, which overrides CONFIG_HID and builds HID without
input support.

Relevant lines from "make ep93xx_defconfig" output:

Generic input layer (needed for keyboard, mouse, ...) (INPUT) [N/m/y/?] n
Support for Host-side USB (USB) [Y/n/m/?] y
USB Human Interface Device (full HID) support (USB_HID) [Y/n/m/?] (NEW) y

Can USB_HID also depend on INPUT ?

> ----- Forwarded message from Russell King <rmk+lkml@....linux.org.uk> -----
> 
> Date: Fri, 22 Dec 2006 17:09:16 +0000
> From: Russell King <rmk+lkml@....linux.org.uk>
> To: Linux Kernel List <linux-kernel@...r.kernel.org>
> Cc: jkosina@...e.cz, linux-input@...ey.karlin.mff.cuni.cz
> Subject: [PATCH] Fix some ARM builds due to HID brokenness
> 
> The new location for HID is extremely annoying:
> 
> 1. the help text implies that you need to enable it for any
>    keyboard or mouse attached to the system.  This is not
>    correct.
> 
> 2. it defaults to 'y'.  When you have input deselected, this
>    causes the kernel to fail to link:
> 
> drivers/built-in.o: In function `usb_hidinput_input_event':
> hid-input.c:(.text+0x55054): undefined reference to `input_ff_event'
> drivers/built-in.o: In function `hidinput_hid_event':
> hid-input.c:(.text+0x6446c): undefined reference to `input_event'
> hid-input.c:(.text+0x644f8): undefined reference to `input_event'
> hid-input.c:(.text+0x64550): undefined reference to `input_event'
> hid-input.c:(.text+0x64590): undefined reference to `input_event'
> hid-input.c:(.text+0x645b8): undefined reference to `input_event'
> drivers/built-in.o: In function `hidinput_disconnect':
> hid-input.c:(.text+0x64624): undefined reference to `input_unregister_device'
> drivers/built-in.o: In function `hidinput_report_event':
> hid-input.c:(.text+0x64670): undefined reference to `input_event'
> drivers/built-in.o: In function `hidinput_connect':
> hid-input.c:(.text+0x64824): undefined reference to `input_allocate_device'
> hid-input.c:(.text+0x675e0): undefined reference to `input_register_device'
> hid-input.c:(.text+0x67698): undefined reference to `input_free_device'
> hid-input.c:(.text+0x676b8): undefined reference to `input_register_device'
> make: *** [.tmp_vmlinux1] Error 1
> 
> Fix the second problem by making it depend on INPUT.  The first
> problem is left as an exercise for the HID maintainers to solve.
> 
> Signed-off-by: Russell King <rmk+kernel@....linux.org.uk>
> 
> diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig
> index 96d4a0b..1ccc222 100644
> --- a/drivers/hid/Kconfig
> +++ b/drivers/hid/Kconfig
> @@ -6,6 +6,7 @@ menu "HID Devices"
>  
>  config HID
>  	tristate "Generic HID support"
> +	depends on INPUT
>  	default y
>  	---help---
>  	  Say Y here if you want generic HID support to connect keyboards,
> 
> ----- End forwarded message -----
> -
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-- 
Russell King
 Linux kernel    2.6 ARM Linux   - http://www.arm.linux.org.uk/
 maintainer of:
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