Fix eventing in kernel

drivers/ahcid/src/main.rs

@@ -45,7 +45,9 @@ fn main() {
             let scheme = DiskScheme::new(ahci::disks(address));
             loop {
                 let mut event = Event::default();
-                event_file.read(&mut event).expect("ahcid: failed to read event file");
+                if event_file.read(&mut event).expect("ahcid: failed to read event file") == 0 {
+                    break;
+                }
                 if event.id == socket_fd {
                     loop {
                         let mut packet = Packet::default();

kernel/context/event.rs

@@ -101,7 +101,7 @@ pub fn trigger(scheme_id: usize, event_id: usize, flags: usize, data: usize) {
         for entry in event_lists.iter() {
             if let Some(event_list) = entry.1.upgrade() {
                 event_list.send(Event {
-                    id: (entry.0).context_id,
+                    id: (entry.0).fd,
                     flags: flags,
                     data: data
                 });