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

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Linux next-20220223 arch riscv build warnings noticed.
Build configs:
  - riscv-gcc-9-defconfig
  - riscv-gcc-9-defconfig
  - riscv-gcc-10-defconfig
  - riscv-gcc-11-defconfig

metadata:
  git_ref: master
  git_repo: https://gitlab.com/Linaro/lkft/mirrors/next/linux-next
  git_sha: d4a0ae62a277377de396850ed4b709b6bd9b7326
  git_describe: next-20220223
  arch: riscv
  toolchain: gcc-11

Build warnings:
-----------
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],
      |
~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
make[1]: Target '__all' not remade because of errors.

Reported-by: Linux Kernel Functional Testing <lkft@xxxxxxxxxx>

Steps to reproduce:
------------------
# To install tuxmake on your system globally:
# sudo pip3 install -U tuxmake

tuxmake --runtime podman --target-arch riscv --toolchain gcc-11
--kconfig defconfig

--
Linaro LKFT
https://lkft.linaro.org

[1] https://builds.tuxbuild.com/25XO99nwfQgKrWKz4yfBPYw0wyU/



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