[PATCH] ehci: add tt_usecs
This adds the field tt_usecs to ehci_qh and ehci_iso_stream, and sets it
appropriately when setting them up as periodic endpoints. It records
the transation translator's think_time (added in last patch) plus the
downstream (i.e. low or full speed) bustime of the transfer associated
with each interrupt or iso frame, as calculated by usb_calc_bus_time.
Signed-off-by: Dan Streetman <ddstreet@ieee.org>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/host/ehci-q.c b/drivers/usb/host/ehci-q.c
index 20df01a..940d38c 100644
--- a/drivers/usb/host/ehci-q.c
+++ b/drivers/usb/host/ehci-q.c
@@ -677,6 +677,9 @@
goto done;
}
} else {
+ struct usb_tt *tt = urb->dev->tt;
+ int think_time;
+
/* gap is f(FS/LS transfer times) */
qh->gap_uf = 1 + usb_calc_bus_time (urb->dev->speed,
is_input, 0, maxp) / (125 * 1000);
@@ -690,6 +693,10 @@
qh->c_usecs = HS_USECS (0);
}
+ think_time = tt ? tt->think_time : 0;
+ qh->tt_usecs = NS_TO_US (think_time +
+ usb_calc_bus_time (urb->dev->speed,
+ is_input, 0, max_packet (maxp)));
qh->period = urb->interval;
}
}