linux-kernel - [PATCH 00/10] backlight: qcom-wled: fix and solidify handling of enabled-strings

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Date:   Mon,  4 Oct 2021 21:27:31 +0200
From:   Marijn Suijten <marijn.suijten@...ainline.org>
To:     phone-devel@...r.kernel.org, Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Lee Jones <lee.jones@...aro.org>,
        Daniel Thompson <daniel.thompson@...aro.org>,
        Jingoo Han <jingoohan1@...il.com>
Cc:     ~postmarketos/upstreaming@...ts.sr.ht,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...ainline.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Martin Botka <martin.botka@...ainline.org>,
        Jami Kettunen <jami.kettunen@...ainline.org>,
        Pavel Dubrova <pashadubrova@...il.com>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        Kiran Gunda <kgunda@...eaurora.org>,
        Courtney Cavin <courtney.cavin@...ymobile.com>,
        Bryan Wu <cooloney@...il.com>, linux-arm-msm@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, linux-fbdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 00/10] backlight: qcom-wled: fix and solidify handling of enabled-strings

This patchset fixes WLED's handling of enabled-strings: besides some
cleanup it is now actually possible to specify a non-contiguous array of
enabled strings (not necessarily starting at zero) and the values from
DT are now validated to prevent possible unexpected out-of-bounds
register and array element accesses.
Off-by-one mistakes in the maximum number of strings, also causing
out-of-bounds access, have been addressed as well.

Marijn Suijten (10):
  backlight: qcom-wled: Pass number of elements to read to
    read_u32_array
  backlight: qcom-wled: Use cpu_to_le16 macro to perform conversion
  backlight: qcom-wled: Override num-strings when enabled-strings is set
  backlight: qcom-wled: Validate enabled string indices in DT
  backlight: qcom-wled: Fix off-by-one maximum with default num_strings
  backlight: qcom-wled: Remove unnecessary 4th default string in wled3
  backlight: qcom-wled: Provide enabled_strings default for wled 4 and 5
  backlight: qcom-wled: Remove unnecessary double whitespace
  backlight: qcom-wled: Consistently use enabled-strings in
    set_brightness
  backlight: qcom-wled: Consider enabled_strings in autodetection

 drivers/video/backlight/qcom-wled.c | 88 ++++++++++++++++++-----------
 1 file changed, 55 insertions(+), 33 deletions(-)

-- 
2.33.0