linux-kernel - MSM8960: gpu/drm/dp/drm_dp.c:59:27: warning: array subscript 10 is outside, array bounds of 'const u8[6]'

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Date:   Tue, 1 Mar 2022 18:39:19 -0800
From:   Rudraksha Gupta <guptarud@...il.com>
To:     dri-devel@...ts.freedesktop.org,
        open list <linux-kernel@...r.kernel.org>,
        Linux-Next Mailing List <linux-next@...r.kernel.org>
Cc:     David Airlie <airlied@...ux.ie>, Daniel Vetter <daniel@...ll.ch>,
        Lyude Paul <lyude@...hat.com>, ville.syrjala@...ux.intel.com,
        jani.nikula@...el.com, airlied@...hat.com, dianders@...omium.org,
        tzimmermann@...e.de, sfr@...b.auug.org.au,
        lkft-triage@...ts.linaro.org
Subject: MSM8960: gpu/drm/dp/drm_dp.c:59:27: warning: array subscript 10 is
 outside, array bounds of 'const u8[6]'

Hi all,


I am getting this warning when compiling the kernel for the MSM8960 with 
this defconfig: 
https://raw.githubusercontent.com/apq8064-mainline/linux/qcom-apq8064-next/arch/arm/configs/qcom_apq8064_defconfig


Warning:

../drivers/gpu/drm/dp/drm_dp.c: In function 
'drm_dp_get_adjust_request_post_cursor':
../drivers/gpu/drm/dp/drm_dp.c:59:27: warning: array subscript 10 is 
outside array bounds of 'const u8[6]' {aka 'const unsigned char[6]'} 
[-Warray-bounds]
    59 |         return link_status[r - DP_LANE0_1_STATUS];
       |                ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
../drivers/gpu/drm/dp/drm_dp.c:210:51: note: while referencing 'link_status'
   210 | u8 drm_dp_get_adjust_request_post_cursor(const u8 
link_status[DP_LINK_STATUS_SIZE],
       | ~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~