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@xxxxxxxxx>
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@xxxxxxxxx>
Link: https://lore.kernel.org/r/Y0f+tKCz+ZAIoroQ@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Cc: <Stable@xxxxxxxxxxxxxxx>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
---
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++;
--
2.38.1
