This is a note to let you know that I've just added the patch titled
tools: iio: iio_utils: fix digit calculation
to my char-misc git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git in the char-misc-linus branch.
The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)
The patch will hopefully also be merged in Linus's tree for the next -rc kernel release.
If you have any questions about this process, please let me know.
From 72b2aa38191bcba28389b0e20bf6b4f15017ff2b Mon Sep 17 00:00:00 2001 From: Matti Vaittinen mazziesaccount@gmail.com Date: Thu, 13 Oct 2022 15:04:04 +0300 Subject: tools: iio: iio_utils: fix digit calculation
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: 096f9b862e60 ("tools:iio:iio_utils: implement digit calculation") Signed-off-by: Matti Vaittinen mazziesaccount@gmail.com Link: https://lore.kernel.org/r/Y0f+tKCz+ZAIoroQ@dc75zzyyyyyyyyyyyyycy-3.rev.dnain... Cc: Stable@vger.kernel.org Signed-off-by: Jonathan Cameron Jonathan.Cameron@huawei.com --- 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 aadee6d34c74..8d35893b2fa8 100644 --- a/tools/iio/iio_utils.c +++ b/tools/iio/iio_utils.c @@ -547,6 +547,10 @@ 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++;