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[PATCH] UHCI: store the period in the queue header

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This patch (as689) stores the period for periodic transfers (interrupt
and ISO) in the queue header.  This is necessary for proper bandwidth
tracking (not yet implemented).  It also makes the scheduling of ISO
transfers a bit more rigorous, with checks for out-of-bounds frame
numbers.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Alan Stern
2006-05-19 16:44:55 -04:00
committed by Greg Kroah-Hartman
parent 10b8e47d6b
commit caf3827a65
3 changed files with 68 additions and 55 deletions
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5
drivers/usb/host/uhci-debug.c
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@@ -153,7 +153,7 @@ static int uhci_show_qh(struct uhci_qh *qh, char *buf, int len, int space)
char *qtype;
/* Try to make sure there's enough memory */
if (len < 80 * 6)
if (len < 80 * 7)
return 0;
switch (qh->type) {
@@ -167,6 +167,9 @@ static int uhci_show_qh(struct uhci_qh *qh, char *buf, int len, int space)
out += sprintf(out, "%*s[%p] %s QH link (%08x) element (%08x)\n",
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\n",
space, "", qh->period);
if (element & UHCI_PTR_QH)
out += sprintf(out, "%*s Element points to QH (bug?)\n", space, "");