selftests: power_supply: Make it POSIX-compliant

There is one use of bash specific syntax in the script. Change it to the
equivalent POSIX syntax. This doesn't change functionality and allows
the test to be run on shells other than bash.

Reported-by: Mike Looijmans <mike.looijmans@topic.nl>
Closes: https://lore.kernel.org/all/efae4037-c22a-40be-8ba9-7c1c12ece042@topic.nl/
Fixes: 4a679c5afca0 ("selftests: Add test to verify power supply properties")
Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
Reviewed-by: Muhammad Usama Anjum <usama.anjum@collabora.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>

diff --git a/tools/testing/selftests/power_supply/test_power_supply_properties.sh b/tools/testing/selftests/power_supply/test_power_supply_properties.sh
index df272dfe1d2a9dce1681679043337b4cd7912dc3..a66b1313ed8824bcf528bb5f499c373406eb876f 100755 (executable)
--- a/tools/testing/selftests/power_supply/test_power_supply_properties.sh
+++ b/tools/testing/selftests/power_supply/test_power_supply_properties.sh
@@ -23,7 +23,7 @@ count_tests() {
        total_tests=0
 
        for i in $SUPPLIES; do
-               total_tests=$(("$total_tests" + "$NUM_TESTS"))
+               total_tests=$((total_tests + NUM_TESTS))
        done
 
        echo "$total_tests"