linux-kernel - Re: [PATCH v2 1/1] iio: adc: qcom-spmi-adc5: Fix the channel name

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Date:   Mon, 23 Jan 2023 18:01:18 +0100
From:   Marijn Suijten <marijn.suijten@...ainline.org>
To:     Konrad Dybcio <konrad.dybcio@...aro.org>
Cc:     Jonathan Cameron <jic23@...nel.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>,
        Nuno Sá <nuno.sa@...log.com>,
        linux-arm-msm@...r.kernel.org, linux-iio@...r.kernel.org,
        linux-kernel@...r.kernel.org, Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Douglas Anderson <dianders@...omium.org>
Subject: Re: [PATCH v2 1/1] iio: adc: qcom-spmi-adc5: Fix the channel name

On 2023-01-23 17:35:34, Konrad Dybcio wrote:
> On 22.01.2023 18:24, Jonathan Cameron wrote:
> > On Wed, 18 Jan 2023 12:06:23 +0200
> > Andy Shevchenko <andriy.shevchenko@...ux.intel.com> wrote:
> > 
> >> The node name can contain an address part which is unused
> >> by the driver. Moreover, this string is propagated into
> >> the userspace label, sysfs filenames *and breaking ABI*.
> >>
> >> Cut the address part out before assigning the channel name.
> >>
> >> Fixes: 4f47a236a23d ("iio: adc: qcom-spmi-adc5: convert to device properties")
> >> Reported-by: Marijn Suijten <marijn.suijten@...ainline.org>
> >> Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
> > 
> > LGTM, but given it will have ABI impact, I'd like to hear from 
> > Andy, Bjorn or Konrad as maintainers and /or Dmitry as someone
> > who has touched this driver fairly recently.
> + Doug
> 
> Unless the Chromium folks relied on the old names (they're the
> only ones I can think of that actually could have tapped into
> this), I say green light!

Can you clarify "old names"?  The ABI-broken ones after Nuno's patch
with @xx suffix, or the orignal names (without @xx) before that, which
this patch from Andy reverts back to?

- Marijn