uloop: fix deleting pending fd events on uloop_fd_del

When a fd gets deleted internally due to errors, fd->registered gets set
to false before events are moved to the staging array.
This leads to pending events not getting cleared properly when the fd
user finally calls uloop_fd_del.
Fix this by moving the check down and always checking for pending
events.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

1 files changed, 4 insertions, 3 deletions

diff --git a/uloop.c b/uloop.c
index deb08a3..9a0590f 100644
--- a/uloop.c
+++ b/uloop.c
@@ -392,15 +392,16 @@ int uloop_fd_delete(struct uloop_fd *fd)
 {
 	int i;
 
-	if (!fd->registered)
-		return 0;
-
 	for (i = 0; i < cur_nfds; i++) {
 		if (cur_fds[cur_fd + i].fd != fd)
 			continue;
 
 		cur_fds[cur_fd + i].fd = NULL;
 	}
+
+	if (!fd->registered)
+		return 0;
+
 	fd->registered = false;
 	uloop_fd_stack_event(fd, -1);
 	return __uloop_fd_delete(fd);