Merge remote-tracking branch 'remotes/kraxel/tags/pull-usb-20160202-1…

…' into staging

usb: two ehci fixes.

# gpg: Signature made Tue 02 Feb 2016 13:12:00 GMT using RSA key ID D3E87138
# gpg: Good signature from "Gerd Hoffmann (work) <kraxel@redhat.com>"
# gpg:                 aka "Gerd Hoffmann <gerd@kraxel.org>"
# gpg:                 aka "Gerd Hoffmann (private) <kraxel@gmail.com>"

* remotes/kraxel/tags/pull-usb-20160202-1:
  ehci: update irq on reset
  usb: check page select value while processing iTD

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

hw/usb/hcd-ehci.c

@@ -866,6 +866,7 @@ void ehci_reset(void *opaque)
     s->usbsts = USBSTS_HALT;
     s->usbsts_pending = 0;
     s->usbsts_frindex = 0;
+    ehci_update_irq(s);
 
     s->astate = EST_INACTIVE;
     s->pstate = EST_INACTIVE;
@@ -1405,21 +1406,23 @@ static int ehci_process_itd(EHCIState *ehci,
         if (itd->transact[i] & ITD_XACT_ACTIVE) {
             pg   = get_field(itd->transact[i], ITD_XACT_PGSEL);
             off  = itd->transact[i] & ITD_XACT_OFFSET_MASK;
-            ptr1 = (itd->bufptr[pg] & ITD_BUFPTR_MASK);
-            ptr2 = (itd->bufptr[pg+1] & ITD_BUFPTR_MASK);
             len  = get_field(itd->transact[i], ITD_XACT_LENGTH);
 
             if (len > max * mult) {
                 len = max * mult;
             }
-
-            if (len > BUFF_SIZE) {
+            if (len > BUFF_SIZE || pg > 6) {
                 return -1;
             }
 
+            ptr1 = (itd->bufptr[pg] & ITD_BUFPTR_MASK);
             qemu_sglist_init(&ehci->isgl, ehci->device, 2, ehci->as);
             if (off + len > 4096) {
                 /* transfer crosses page border */
+                if (pg == 6) {
+                    return -1;  /* avoid page pg + 1 */
+                }
+                ptr2 = (itd->bufptr[pg + 1] & ITD_BUFPTR_MASK);
                 uint32_t len2 = off + len - 4096;
                 uint32_t len1 = len - len2;
                 qemu_sglist_add(&ehci->isgl, ptr1 + off, len1);