[PULL 19/25] usbnet: Detect short packets as sent by the xHCI controller

[Gerd Hoffmann <kraxel@redhat.com>]

From: Michael Brown <mcb30@ipxe.org>

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>
Message-Id: <20220906183053.3625472-4-mcb30@ipxe.org>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 hw/usb/dev-network.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/usb/dev-network.c b/hw/usb/dev-network.c
index 155df935cd68..9d83974ec9f0 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;
         }
-- 
2.37.3