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usb-smartcard-reader: Properly NAK interrupt eps when we've no events 

When we've no data to return from the interrupt endpoint, return NAK rather
then a 0 length packet.

CC: Alon Levy <alevy@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Hans de Goede 2012-11-17 12:15:02 +01:00 committed by Gerd Hoffmann
parent 33c1a6856f
commit c4020746ff
1 changed files with 2 additions and 0 deletions
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2
hw/usb/dev-smartcard-reader.c
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@ -1002,6 +1002,8 @@ static void ccid_handle_data(USBDevice *dev, USBPacket *p)
"handle_data: int_in: notify_slot_change %X, " "handle_data: int_in: notify_slot_change %X, "
"requested len %zd\n", "requested len %zd\n",
s->bmSlotICCState, p->iov.size); s->bmSlotICCState, p->iov.size);
} else {
p->status = USB_RET_NAK;
} }
break; break;
default: default: