Just to be safe, check for the pattern only at the start of a line, since it is possible to add a comment with this in it.
Signed-off-by: Simon Glass <s...@chromium.org> --- bin/writer.rpi3_mount | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/bin/writer.rpi3_mount b/bin/writer.rpi3_mount index 7b078a1..97f24a5 100755 --- a/bin/writer.rpi3_mount +++ b/bin/writer.rpi3_mount @@ -41,7 +41,7 @@ fi # Enable the UART and fix the GPU frequency so it works correctly sed -i '/enable_uart/c\enable_uart = 1' /media/rpi3_b_boot/config.txt -if ! grep -q gpu_freq=250 /media/rpi3_b_boot/config.txt; then +if ! grep -q "^gpu_freq=250" /media/rpi3_b_boot/config.txt; then echo 'gpu_freq=250' >>/media/rpi3_b_boot/config.txt fi -- 2.33.1.1089.g2158813163f-goog