[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>

1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/usb/host/ehci-q.c b/drivers/usb/host/ehci-q.c
index 20df01a79b2e..940d38ca7d91 100644
--- a/drivers/usb/host/ehci-q.c
+++ b/drivers/usb/host/ehci-q.c
@@ -677,6 +677,9 @@ qh_make (
                                 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_make (
                                 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;
                 }
         }