diff options
Diffstat (limited to 'devices/src/usb/xhci')
| -rw-r--r-- | devices/src/usb/xhci/ring_buffer.rs | 23 |
1 files changed, 10 insertions, 13 deletions
diff --git a/devices/src/usb/xhci/ring_buffer.rs b/devices/src/usb/xhci/ring_buffer.rs index 2f66fa8..5e2c570 100644 --- a/devices/src/usb/xhci/ring_buffer.rs +++ b/devices/src/usb/xhci/ring_buffer.rs @@ -67,19 +67,16 @@ impl RingBuffer { pub fn dequeue_transfer_descriptor(&mut self) -> Result<Option<TransferDescriptor>> { let mut td: TransferDescriptor = TransferDescriptor::new(); while let Some(addressed_trb) = self.get_current_trb()? { - match addressed_trb.trb.trb_type() { - Ok(TrbType::Link) => { - let link_trb = addressed_trb - .trb - .cast::<LinkTrb>() - .map_err(Error::CastTrb)?; - self.dequeue_pointer = GuestAddress(link_trb.get_ring_segment_pointer()); - self.consumer_cycle_state = - self.consumer_cycle_state != link_trb.get_toggle_cycle_bit(); - continue; - } - _ => {} - }; + if let Ok(TrbType::Link) = addressed_trb.trb.trb_type() { + let link_trb = addressed_trb + .trb + .cast::<LinkTrb>() + .map_err(Error::CastTrb)?; + self.dequeue_pointer = GuestAddress(link_trb.get_ring_segment_pointer()); + self.consumer_cycle_state = + self.consumer_cycle_state != link_trb.get_toggle_cycle_bit(); + continue; + } self.dequeue_pointer = match self.dequeue_pointer.checked_add(size_of::<Trb>() as u64) { Some(addr) => addr, |