In /logs/firmware/unblob_extracted/firmware_extract/11108416-13869836.lzma_extract/lzma.uncompressed_extract/3761304-11775640.cpio_portable_ascii_extract/usr/bin/tf_update.sh line 3:

if [ ! $1 ]; then

       ^-- SC2086 (info): Double quote to prevent globbing and word splitting.

Did you mean: 

if [ ! "$1" ]; then

In /logs/firmware/unblob_extracted/firmware_extract/11108416-13869836.lzma_extract/lzma.uncompressed_extract/3761304-11775640.cpio_portable_ascii_extract/usr/bin/tf_update.sh line 10:

UPDATE_FW_NAME=ZRT_CAMERA_FW.bin

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

In /logs/firmware/unblob_extracted/firmware_extract/11108416-13869836.lzma_extract/lzma.uncompressed_extract/3761304-11775640.cpio_portable_ascii_extract/usr/bin/tf_update.sh line 23:

unzip ${UPDATE_PACK_FILE_PATH} -d /tmp/

      ^----------------------^ SC2086 (info): Double quote to prevent globbing and word splitting.

Did you mean: 

unzip "${UPDATE_PACK_FILE_PATH}" -d /tmp/

In /logs/firmware/unblob_extracted/firmware_extract/11108416-13869836.lzma_extract/lzma.uncompressed_extract/3761304-11775640.cpio_portable_ascii_extract/usr/bin/tf_update.sh line 25:

if [ $? -ne 0 ]; then

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

In /logs/firmware/unblob_extracted/firmware_extract/11108416-13869836.lzma_extract/lzma.uncompressed_extract/3761304-11775640.cpio_portable_ascii_extract/usr/bin/tf_update.sh line 32:

cd ${UPDATE_DIR_PATH}

^-------------------^ SC2164 (warning): Use 'cd ... || exit' or 'cd ... || return' in case cd fails.

Did you mean: 

cd ${UPDATE_DIR_PATH} || exit

In /logs/firmware/unblob_extracted/firmware_extract/11108416-13869836.lzma_extract/lzma.uncompressed_extract/3761304-11775640.cpio_portable_ascii_extract/usr/bin/tf_update.sh line 35:

if [ $? -ne 0 ]; then

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

In /logs/firmware/unblob_extracted/firmware_extract/11108416-13869836.lzma_extract/lzma.uncompressed_extract/3761304-11775640.cpio_portable_ascii_extract/usr/bin/tf_update.sh line 49:

echo "Current version: "${FWINFO_CURRENT}

                        ^---------------^ SC2086 (info): Double quote to prevent globbing and word splitting.

Did you mean: 

echo "Current version: ""${FWINFO_CURRENT}"

In /logs/firmware/unblob_extracted/firmware_extract/11108416-13869836.lzma_extract/lzma.uncompressed_extract/3761304-11775640.cpio_portable_ascii_extract/usr/bin/tf_update.sh line 50:

echo "Target version: "${FWINFO_TO}

                       ^----------^ SC2086 (info): Double quote to prevent globbing and word splitting.

Did you mean: 

echo "Target version: ""${FWINFO_TO}"

In /logs/firmware/unblob_extracted/firmware_extract/11108416-13869836.lzma_extract/lzma.uncompressed_extract/3761304-11775640.cpio_portable_ascii_extract/usr/bin/tf_update.sh line 68:

if [ $? -ne 0 ]; then

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

In /logs/firmware/unblob_extracted/firmware_extract/11108416-13869836.lzma_extract/lzma.uncompressed_extract/3761304-11775640.cpio_portable_ascii_extract/usr/bin/tf_update.sh line 73:

tag_generator --tag_path=/dev/mtdblock1 --update --fwinfo=${FWINFO_TO}

                                                          ^----------^ SC2086 (info): Double quote to prevent globbing and word splitting.

Did you mean: 

tag_generator --tag_path=/dev/mtdblock1 --update --fwinfo="${FWINFO_TO}"

In /logs/firmware/unblob_extracted/firmware_extract/11108416-13869836.lzma_extract/lzma.uncompressed_extract/3761304-11775640.cpio_portable_ascii_extract/usr/bin/tf_update.sh line 80:

echo "Update to new version: "${FWINFO_NEW}

                              ^-----------^ SC2086 (info): Double quote to prevent globbing and word splitting.

Did you mean: 

echo "Update to new version: ""${FWINFO_NEW}"

For more information:

  https://www.shellcheck.net/wiki/SC2034 -- UPDATE_FW_NAME appears unused. Ve...

  https://www.shellcheck.net/wiki/SC2164 -- Use 'cd ... || exit' or 'cd ... |...

  https://www.shellcheck.net/wiki/SC2086 -- Double quote to prevent globbing ...