From 35588019fc5bfc40c568e480e8a95d55487f870a Mon Sep 17 00:00:00 2001 From: Matti Vaittinen Date: Thu, 13 Oct 2022 15:04:04 +0300 Subject: [PATCH] tools: iio: iio_utils: fix digit calculation commit 1bd92c10b15b6a1691da91a6517710993383eef9 upstream. The iio_utils uses a digit calculation in order to know length of the file name containing a buffer number. The digit calculation does not work for number 0. This leads to allocation of one character too small buffer for the file-name when file name contains value '0'. (Eg. buffer0). Fix digit calculation by returning one digit to be present for number '0'. Fixes: 49d2f0cbd472 ("tools:iio:iio_utils: implement digit calculation") Signed-off-by: Matti Vaittinen Link: https://lore.kernel.org/r/Y0f+tKCz+ZAIoroQ@dc75zzyyyyyyyyyyyyycy-3.rev.dnainternet.fi Cc: Signed-off-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman --- tools/iio/iio_utils.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/tools/iio/iio_utils.c b/tools/iio/iio_utils.c index 7399eb7f13786..d66b18c54606a 100644 --- a/tools/iio/iio_utils.c +++ b/tools/iio/iio_utils.c @@ -543,6 +543,10 @@ static int calc_digits(int num) { int count = 0; + /* It takes a digit to represent zero */ + if (!num) + return 1; + while (num != 0) { num /= 10; count++; -- 2.39.5