[libgpiod][PATCH 1/7] core: use gpiod_line_event_get_fd() in gpiod_line_event_read()

[Bartosz Golaszewski <brgl@xxxxxxxx>]

From: Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx>

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@xxxxxxxxxxxx>
---
 lib/core.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/lib/core.c b/lib/core.c
index b9fd6f4..89f5465 100644
--- 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);
 }
-- 
2.23.0