[PATCH] UHCI: Remove non-iso TDs as they are used

This patch (as680) frees non-isochronous TDs as they are used, rather
than all at once when an URB is complete.  Although not a terribly
important change in itself, it opens the door to a later enhancement
that will reduce storage requirements by allocating only a limited
number of TDs at any time for each endpoint queue.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 2 insertions, 3 deletions

diff --git a/drivers/usb/host/uhci-hcd.h b/drivers/usb/host/uhci-hcd.h
index 8e5778650493..3093ca250942 100644
--- a/drivers/usb/host/uhci-hcd.h
+++ b/drivers/usb/host/uhci-hcd.h
@@ -129,6 +129,7 @@ struct uhci_qh {
         struct list_head queue;         /* Queue of urbps for this QH */
         struct uhci_qh *skel;           /* Skeleton for this QH */
         struct uhci_td *dummy_td;       /* Dummy TD to end the queue */
+        struct uhci_td *post_td;        /* Last TD completed */
 
         unsigned int unlink_frame;      /* When the QH was unlinked */
         int state;                      /* QH_STATE_xxx; see above */
@@ -136,7 +137,7 @@ struct uhci_qh {
 
         unsigned int initial_toggle:1;  /* Endpoint's current toggle value */
         unsigned int needs_fixup:1;     /* Must fix the TD toggle values */
-        unsigned int is_stopped:1;      /* Queue was stopped by an error */
+        unsigned int is_stopped:1;      /* Queue was stopped by error/unlink */
 } __attribute__((aligned(16)));
 
 /*
@@ -456,8 +457,6 @@ struct urb_priv {
         struct list_head td_list;
 
         unsigned fsbr : 1;              /* URB turned on FSBR */
-        unsigned short_transfer : 1;    /* URB got a short transfer, no
-                                         * need to rescan */
 };