Support for new fevent

e1000d/src/device.rs

@@ -211,7 +211,7 @@ impl SchemeBlockMut for Intel8254x {
 
     fn fevent(&mut self, id: usize, _flags: usize) -> Result<Option<usize>> {
         let _flags = self.handles.get(&id).ok_or(Error::new(EBADF))?;
-        Ok(Some(id))
+        Ok(Some(0))
     }
 
     fn fpath(&mut self, id: usize, buf: &mut [u8]) -> Result<Option<usize>> {

rtl8168d/src/device.rs

@@ -176,7 +176,7 @@ impl SchemeMut for Rtl8168 {
 
     fn fevent(&mut self, id: usize, _flags: usize) -> Result<usize> {
         let _flags = self.handles.get(&id).ok_or(Error::new(EBADF))?;
-        Ok(id)
+        Ok(0)
     }
 
     fn fpath(&mut self, id: usize, buf: &mut [u8]) -> Result<usize> {

vesad/src/scheme.rs

@@ -139,7 +139,7 @@ impl SchemeMut for DisplayScheme {
 
         if let HandleKind::Screen(_screen_i) = handle.kind {
             handle.events = flags;
-            Ok(id)
+            Ok(0)
         } else {
             Err(Error::new(EBADF))
         }