diff mbox series

[3/4] usbnet: Detect short packets as sent by the xHCI controller

Message ID 20220906183053.3625472-4-mcb30@ipxe.org (mailing list archive)
State New, archived
Headers show
Series Fix USB network CDC-ECM mode support | expand

Commit Message

Michael Brown Sept. 6, 2022, 6:30 p.m. UTC 
The xHCI controller will ignore the endpoint MTU and so may deliver
packets of any length.  Detect short packets as being any packet that
has a length of zero or a length that is not a multiple of the MTU.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
---
 hw/usb/dev-network.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/hw/usb/dev-network.c b/hw/usb/dev-network.c
index 155df935cd..9d83974ec9 100644
--- a/hw/usb/dev-network.c
+++ b/hw/usb/dev-network.c
@@ -1211,7 +1211,7 @@  static void usb_net_handle_dataout(USBNetState *s, USBPacket *p)
     s->out_ptr += sz;
 
     if (!is_rndis(s)) {
-        if (p->iov.size < 64) {
+        if (p->iov.size % 64 || p->iov.size == 0) {
             qemu_send_packet(qemu_get_queue(s->nic), s->out_buf, s->out_ptr);
             s->out_ptr = 0;
         }