diff options
| author | Hans de Goede <hdegoede@redhat.com> | 2012-10-24 18:14:00 +0200 |
|---|---|---|
| committer | Gerd Hoffmann <kraxel@redhat.com> | 2012-10-25 09:08:09 +0200 |
| commit | cf08a8a1f600b2ac25f72cf5736247f3e95cc43d (patch) | |
| tree | fa78b5a407caec549bda5d9c09bf29e7d4c5ad34 /hw/usb/hcd-ehci.c | |
| parent | 549a3c3d9665bdc0246fb6594b6e36ce3afadd21 (diff) | |
| download | qemu-cf08a8a1f600b2ac25f72cf5736247f3e95cc43d.zip qemu-cf08a8a1f600b2ac25f72cf5736247f3e95cc43d.tar.gz qemu-cf08a8a1f600b2ac25f72cf5736247f3e95cc43d.tar.bz2 | |
ehci: Set int flag on a short input packet
According to 4.15.1.2 an interrupt must be raised when a short packet
is received. If we don't do this it may take a significant time for
the guest to notice a short trasnfer has completed, since only the last td
will have its IOC flag set, and a short transfer may complete in an earlier
packet.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Diffstat (limited to 'hw/usb/hcd-ehci.c')
| -rw-r--r-- | hw/usb/hcd-ehci.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/hw/usb/hcd-ehci.c b/hw/usb/hcd-ehci.c index 82f4dbd..8b4e3c8 100644 --- a/hw/usb/hcd-ehci.c +++ b/hw/usb/hcd-ehci.c @@ -1508,6 +1508,10 @@ static void ehci_execute_complete(EHCIQueue *q) if (tbytes && p->pid == USB_TOKEN_IN) { tbytes -= p->usb_status; + if (tbytes) { + /* 4.15.1.2 must raise int on a short input packet */ + ehci_raise_irq(q->ehci, USBSTS_INT); + } } else { tbytes = 0; } |