In /logs/firmware/patool_extraction/rootfs.img_unblob_extracted/rootfs.img_extract/0-50593792.squashfs_v4_le_extract/usr/sbin/ac_platform_check.sh line 3:

result=`which served`

^----^ SC2034 (warning): result appears unused. Verify use (or export if used externally).

       ^------------^ SC2006 (style): Use $(...) notation instead of legacy backticks `...`.

Did you mean: 

result=$(which served)

In /logs/firmware/patool_extraction/rootfs.img_unblob_extracted/rootfs.img_extract/0-50593792.squashfs_v4_le_extract/usr/sbin/ac_platform_check.sh line 4:

if [ $? == 0 ]; then

     ^-- SC2181 (style): Check exit code directly with e.g. 'if mycmd;', not indirectly with $?.

        ^-- SC3014 (warning): In POSIX sh, == in place of = is undefined.

For more information:

  https://www.shellcheck.net/wiki/SC2034 -- result appears unused. Verify use...

  https://www.shellcheck.net/wiki/SC3014 -- In POSIX sh, == in place of = is ...

  https://www.shellcheck.net/wiki/SC2006 -- Use $(...) notation instead of le...