diff options
Diffstat (limited to 'hw/usb/hcd-uhci.c')
| -rw-r--r-- | hw/usb/hcd-uhci.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/hw/usb/hcd-uhci.c b/hw/usb/hcd-uhci.c index 2838d21644..ef326330d3 100644 --- a/hw/usb/hcd-uhci.c +++ b/hw/usb/hcd-uhci.c @@ -152,6 +152,7 @@ struct UHCIState { QEMUBH *bh; uint32_t frame_bytes; uint32_t frame_bandwidth; + bool completions_only; UHCIPort ports[NB_PORTS]; /* Interrupts that should be raised at the end of the current frame. */ @@ -891,6 +892,10 @@ static int uhci_handle_td(UHCIState *s, UHCIQueue *q, uint32_t qh_addr, goto done; } + if (s->completions_only) { + return TD_RESULT_ASYNC_CONT; + } + /* Allocate new packet */ if (q == NULL) { USBDevice *dev = uhci_find_device(s, (td->token >> 8) & 0x7f); @@ -960,9 +965,9 @@ static void uhci_async_complete(USBPort *port, USBPacket *packet) } async->done = 1; - if (s->frame_bytes < s->frame_bandwidth) { - qemu_bh_schedule(s->bh); - } + /* Force processing of this packet *now*, needed for migration */ + s->completions_only = true; + qemu_bh_schedule(s->bh); } static int is_valid(uint32_t link) @@ -1054,7 +1059,7 @@ static void uhci_process_frame(UHCIState *s) qhdb_reset(&qhdb); for (cnt = FRAME_MAX_LOOPS; is_valid(link) && cnt; cnt--) { - if (s->frame_bytes >= s->frame_bandwidth) { + if (!s->completions_only && s->frame_bytes >= s->frame_bandwidth) { /* We've reached the usb 1.1 bandwidth, which is 1280 bytes/frame, stop processing */ trace_usb_uhci_frame_stop_bandwidth(); @@ -1170,6 +1175,7 @@ static void uhci_frame_timer(void *opaque) /* prepare the timer for the next frame */ s->expire_time += (get_ticks_per_sec() / FRAME_TIMER_FREQ); s->frame_bytes = 0; + s->completions_only = false; qemu_bh_cancel(s->bh); if (!(s->cmd & UHCI_CMD_RS)) { |