linux-kernel - Re: [PATCH] Input: touchscreen: fix kconfig dependency bug for TOUCHSCREEN

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Date:   Wed, 11 Nov 2020 17:49:03 -0800
From:   Dmitry Torokhov <dmitry.torokhov@...il.com>
To:     Necip Fazil Yildiran <fazilyildiran@...il.com>
Cc:     Jonathan.Cameron@...wei.com, eugen.hristev@...rochip.com,
        linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
        paul@...zz.com, jeho@...utexas.edu
Subject: Re: [PATCH] Input: touchscreen: fix kconfig dependency bug for
 TOUCHSCREEN_ADC

On Tue, Nov 03, 2020 at 01:15:05AM +0300, Necip Fazil Yildiran wrote:
> When TOUCHSCREEN_ADC is enabled and IIO_BUFFER is disabled, it results
> in the following Kbuild warning:
> 
> WARNING: unmet direct dependencies detected for IIO_BUFFER_CB
>   Depends on [n]: IIO [=y] && IIO_BUFFER [=n]
>   Selected by [y]:
>   - TOUCHSCREEN_ADC [=y] && !UML && INPUT [=y] && INPUT_TOUCHSCREEN [=y] && IIO [=y]
> 
> The reason is that TOUCHSCREEN_ADC selects IIO_BUFFER_CB without depending
> on or selecting IIO_BUFFER while IIO_BUFFER_CB depends on IIO_BUFFER. This
> can also fail building the kernel.
> 
> Honor the kconfig dependency to remove unmet direct dependency warnings
> and avoid any potential build failures.
> 
> Fixes: aa132ffb6b0a ("input: touchscreen: resistive-adc-touch: add generic resistive ADC touchscreen")
> Link: https://bugzilla.kernel.org/show_bug.cgi?id=209881
> Signed-off-by: Necip Fazil Yildiran <fazilyildiran@...il.com>

Applied, thank you.

-- 
Dmitry