X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=tools%2Fiio%2Fgeneric_buffer.c;h=01c4f67801e0e0d6ce865f7a4f241e7425645860;hb=59971be7a42edeebb68ff90a130bf7954f4b8fb4;hp=9f7b85bf6ada3e3cdf43508ab9b3589daf14325a;hpb=310b7cec8ea32dcd4e9978423717ce78dd89d45d;p=firefly-linux-kernel-4.4.55.git

diff --git a/tools/iio/generic_buffer.c b/tools/iio/generic_buffer.c
index 9f7b85bf6ada..01c4f67801e0 100644
--- a/tools/iio/generic_buffer.c
+++ b/tools/iio/generic_buffer.c
@@ -328,6 +328,15 @@ int main(int argc, char **argv)
 			"diag %s\n", dev_dir_name);
 		goto error_free_triggername;
 	}
+	if (!num_channels) {
+		fprintf(stderr,
+			"No channels are enabled, we have nothing to scan.\n");
+		fprintf(stderr, "Enable channels manually in "
+			FORMAT_SCAN_ELEMENTS_DIR
+			"/*_en and try again.\n", dev_dir_name);
+		ret = -ENOENT;
+		goto error_free_triggername;
+	}
 
 	/*
 	 * Construct the directory name for the associated buffer.