While executing tools/iio_generic_buffer i was getting this fault:
beagle /usr/src/linux/tools/iio # ./iio_generic_buffer -a -c 10 -N 0 -T 0
iio device number being used is 0
iio trigger number being used is 0
Auto-channels selected but some channels are already activated in sysfs
Proceeding without activating any channels
/sys/bus/iio/devices/iio:device0 mytmr
Floating point exception
The FPE was generated due to a modulo zero in size_from_channelarray()
(all channels[].bytes were zero because channels[] were never populated).
The root of the cause is the seekdir() function within
build_channel_array().
On my system I can observe a clear difference between these two functions:
seekdir(dp, 0);
printf("location = %lu\n", telldir(dp)); // location == 4294967295
rewinddir(dp);
printf("location = %lu\n", telldir(dp)); // location == 1
The attached patch fixed the bug for me.
I'm using a BeagleBone Black devboard with an up-to-date stable branch
Gentoo Linux OS on top of it.
CHOST: armv7a-unknown-linux-gnueabihf
kernel: mainline 6.7.0-rc6
glibc: 2.37-r7:2.2::gentoo USE="caps gd multiarch ssp static-libs -audit
-cet -compile-locales -crypt -custom-cflags -doc -hash-sysv-compat
-headers-only -multilib -multilib-bootstrap -nscd -perl -profile
(-selinux) -stack-realign -suid -systemd -systemtap -test -vanilla"
(+ contains Gentoo specific patches)
Fixes: <e58537ccce733> ("staging: iio: update example application.")
Signed-off-by: Petre Rodan <petre.rodan@xxxxxxxxxxxxxxx>
Petre Rodan (1):
tools: iio: fix iio_generic_buffer
tools/iio/iio_utils.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--
2.41.0
