core: use gpiod_line_event_get_fd() in gpiod_line_event_read()

We can drop the redundant line state check if we directly call
gpiod_line_event_get_fd() from gpiod_line_event_read(). As opposed
to line_get_fd() it checks if the line was requested for events.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>

diff --git a/lib/core.c b/lib/core.c
index b9fd6f42a88a4dd742ac403d90cc75479eebebb7..89f5465b51e7f59e16fdcbd1e138e43e8f8f056d 100644 (file)
--- a/lib/core.c
+++ b/lib/core.c
@@ -1012,12 +1012,9 @@ int gpiod_line_event_read(struct gpiod_line *line,
 {
        int fd;
 
-       if (line->state != LINE_REQUESTED_EVENTS) {
-               errno = EPERM;
+       fd = gpiod_line_event_get_fd(line);
+       if (fd < 0)
                return -1;
-       }
-
-       fd = line_get_fd(line);
 
        return gpiod_line_event_read_fd(fd, event);
 }