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authorLinus Walleij <linus.walleij@linaro.org>2015-08-11 14:34:38 +0200
committerJonathan Cameron <jic23@kernel.org>2015-08-16 11:51:25 +0200
commit672f93b6047cc724f002cf50a84f4e8155b86f12 (patch)
treee470cebf7514dacc03c8344dab1d610e699ea4ec /tools/iio/iio_event_monitor.c
parentiio: st_sensors: add debugfs register read hook (diff)
downloadlinux-672f93b6047cc724f002cf50a84f4e8155b86f12.tar.xz
linux-672f93b6047cc724f002cf50a84f4e8155b86f12.zip
iio: event_monitor: report unsupported events
This makes the event monitor bail out with a helpful error message if a device does not support events, as a related fix to iio core now makes it return -ENODEV properly. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Hartmut Knaack <knaack.h@gmx.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'tools/iio/iio_event_monitor.c')
-rw-r--r--tools/iio/iio_event_monitor.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/tools/iio/iio_event_monitor.c b/tools/iio/iio_event_monitor.c
index cd3fd41b481d..d51eb04202e9 100644
--- a/tools/iio/iio_event_monitor.c
+++ b/tools/iio/iio_event_monitor.c
@@ -284,7 +284,11 @@ int main(int argc, char **argv)
ret = ioctl(fd, IIO_GET_EVENT_FD_IOCTL, &event_fd);
if (ret == -1 || event_fd == -1) {
ret = -errno;
- fprintf(stderr, "Failed to retrieve event fd\n");
+ if (ret == -ENODEV)
+ fprintf(stderr,
+ "This device does not support events\n");
+ else
+ fprintf(stderr, "Failed to retrieve event fd\n");
if (close(fd) == -1)
perror("Failed to close character device file");