UHCI: fix bandwidth allocation
This patch (as840) fixes the bandwidth allocation mechanism in
uhci-hcd. It has never worked correctly.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/host/uhci-debug.c b/drivers/usb/host/uhci-debug.c
index 3fbb5ba..5d6c06b 100644
--- a/drivers/usb/host/uhci-debug.c
+++ b/drivers/usb/host/uhci-debug.c
@@ -168,9 +168,13 @@
space, "", qh, qtype,
le32_to_cpu(qh->link), le32_to_cpu(element));
if (qh->type == USB_ENDPOINT_XFER_ISOC)
- out += sprintf(out, "%*s period %d frame %x desc [%p]\n",
- space, "", qh->period, qh->iso_frame,
- qh->iso_packet_desc);
+ out += sprintf(out, "%*s period %d phase %d load %d us, "
+ "frame %x desc [%p]\n",
+ space, "", qh->period, qh->phase, qh->load,
+ qh->iso_frame, qh->iso_packet_desc);
+ else if (qh->type == USB_ENDPOINT_XFER_INT)
+ out += sprintf(out, "%*s period %d phase %d load %d us\n",
+ space, "", qh->period, qh->phase, qh->load);
if (element & UHCI_PTR_QH)
out += sprintf(out, "%*s Element points to QH (bug?)\n", space, "");
@@ -352,6 +356,17 @@
out += uhci_show_root_hub_state(uhci, out, len - (out - buf));
out += sprintf(out, "HC status\n");
out += uhci_show_status(uhci, out, len - (out - buf));
+
+ out += sprintf(out, "Periodic load table\n");
+ for (i = 0; i < MAX_PHASE; ++i) {
+ out += sprintf(out, "\t%d", uhci->load[i]);
+ if (i % 8 == 7)
+ *out++ = '\n';
+ }
+ out += sprintf(out, "Total: %d, #INT: %d, #ISO: %d\n",
+ uhci->total_load,
+ uhci_to_hcd(uhci)->self.bandwidth_int_reqs,
+ uhci_to_hcd(uhci)->self.bandwidth_isoc_reqs);
if (debug <= 1)
return out - buf;