linux-kernel - Re: [GIT PULL] USB/Thunderbolt/PHY patches for 5.6-rc1

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Date:   Wed, 29 Jan 2020 19:20:27 +0100
From:   Krzysztof Kozlowski <krzk@...nel.org>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     Greg KH <gregkh@...uxfoundation.org>,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-usb@...r.kernel.org, Wolfram Sang <wsa@...-dreams.de>
Subject: Re: [GIT PULL] USB/Thunderbolt/PHY patches for 5.6-rc1

On Wed, Jan 29, 2020 at 10:11:26AM -0800, Linus Torvalds wrote:
> On Wed, Jan 29, 2020 at 2:14 AM Greg KH <gregkh@...uxfoundation.org> wrote:
> >
> > Here is the big USB and Thunderbolt and PHY driver updates for 5.6-rc1.
> 
> Hmm. This actually causes a new warning even before I start building it:
> 
>   WARNING: unmet direct dependencies detected for I2C_S3C2410
>     Depends on [n]: I2C [=y] && HAS_IOMEM [=y] && HAVE_S3C2410_I2C [=n]
>     Selected by [m]:
>     - PHY_EXYNOS5250_SATA [=m] && (SOC_EXYNOS5250 || COMPILE_TEST
> [=y]) && HAS_IOMEM [=y] && OF [=y]
> 
> and the cause seems to be
> 
>   203b7ee14d3a ("phy: Enable compile testing for some of drivers")
> 
> where PHY_EXYNOS5250_SATA now has a
> 
>   depends on SOC_EXYNOS5250 || COMPILE_TEST
>   depends on HAS_IOMEM
>   depends on OF
> 
> and then blindly does a
> 
>   select I2C_S3C2410
> 
> without having the dependencies that I2C_S3C2410 has.
> 
> How did this ever pass any testing in linux-next without being
> noticed, when I noticed within five seconds of pulling it? It
> literally warns immediately on "make allmodconfig".
> 
> The warnings happen during the build too, as it does the silentconfig.
> So I'm not sure how this was missed.
> 
> Stephen, does linux-next perhaps miss these config-time warnings?
> 
> I have partially reverted that commit in my merge (removing the "||
> COMPILE_TEST" for that PHY_EXYNOS5250_SATA entry) because warnings are
> not acceptable.

Hi Linus,

The I2C fix for this is in Wolfram's tree already:
https://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux.git/log/?h=i2c/for-next

Best regards,
Krzysztof