USB: set rx transfer buffer to the max packet size reported by the en…

…dpoint

Trying to limit data loss by limiting the size of the rx buffer
for sumbitted transfers to the max packet size reported by the
rx endpoint.

usb/src/dev_handler.rs

@@ -140,7 +140,7 @@ impl DeviceInner {
         let closed = Arc::new(AtomicBool::new(false));
         let (mut framer, out_framer) = Self::init_framers(&handle, &read_ep);
 
-        let mut read_transfer = Transfer::new_bulk(&handle, read_ep.address, 1024);
+        let mut read_transfer = Transfer::new_bulk(&handle, read_ep.address, read_ep.max_packet_size);
         read_transfer.set_timeout(READ_DURATION);
         read_transfer.set_callback(move |buf| {
             let Some(buf) = buf else {

usb/src/endpoint.rs

@@ -9,7 +9,8 @@ pub struct Endpoint {
     pub iface: u8,
     pub setting: u8,
     pub address: u8,
-    pub transfer_type: TransferType
+    pub transfer_type: TransferType,
+    pub max_packet_size: usize,
 }
 
 pub fn find_endpoint<T: UsbContext>(
@@ -38,6 +39,7 @@ pub fn find_endpoint<T: UsbContext>(
                             setting: interface_desc.setting_number(),
                             address: endpoint_desc.address(),
                             transfer_type: endpoint_desc.transfer_type(),
+                            max_packet_size: endpoint_desc.max_packet_size() as usize,
                         });
                     }
                 }