tools: iio: print error message when buffer enable fails

Running generic_buffer without enabling any channel of the
sensor will fail without printing any error message.

Add an error message that indicates buffer enable failed.

Signed-off-by: Irina Tirdea <irina.tirdea@intel.com>
Acked-by: Hartmut Knaack <knaack.h@gmx.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

1 files changed, 4 insertions, 1 deletions

diff --git a/tools/iio/generic_buffer.c b/tools/iio/generic_buffer.c
index 32f389ebb94d..9f7b85bf6ada 100644
--- a/tools/iio/generic_buffer.c
+++ b/tools/iio/generic_buffer.c
@@ -364,8 +364,11 @@ int main(int argc, char **argv)
 
         /* Enable the buffer */
         ret = write_sysfs_int("enable", buf_dir_name, 1);
-        if (ret < 0)
+        if (ret < 0) {
+                fprintf(stderr,
+                        "Failed to enable buffer: %s\n", strerror(-ret));
                 goto error_free_buf_dir_name;
+        }
 
         scan_size = size_from_channelarray(channels, num_channels);
         data = malloc(scan_size * buf_len);