USB: EHCI: remove dead code in the periodic scheduler

This patch (as1409) removes some dead code from the ehci-hcd
scheduler.  Thanks to the previous patch in this series, stream->depth
is no longer used.  And stream->start and stream->rescheduled
apparently have not been used for quite a while, except in some
statistics-reporting code that never gets invoked.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
CC: David Brownell <david-b@pacbell.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

2 files changed, 0 insertions, 18 deletions

diff --git a/drivers/usb/host/ehci-sched.c b/drivers/usb/host/ehci-sched.c
index 3381319a2b3f..a92526d6e5ae 100644
--- a/drivers/usb/host/ehci-sched.c
+++ b/drivers/usb/host/ehci-sched.c
@@ -1074,15 +1074,6 @@ iso_stream_put(struct ehci_hcd *ehci, struct ehci_iso_stream *stream)
                 if (stream->ep)
                         stream->ep->hcpriv = NULL;
 
-                if (stream->rescheduled) {
-                        ehci_info (ehci, "ep%d%s-iso rescheduled "
-                                "%lu times in %lu seconds\n",
-                                stream->bEndpointAddress, is_in ? "in" : "out",
-                                stream->rescheduled,
-                                ((jiffies - stream->start)/HZ)
-                                );
-                }
-
                 kfree(stream);
         }
 }
@@ -1617,7 +1608,6 @@ itd_link_urb (
                         (stream->bEndpointAddress & USB_DIR_IN) ? "in" : "out",
                         urb->interval,
                         next_uframe >> 3, next_uframe & 0x7);
-                stream->start = jiffies;
         }
         ehci_to_hcd(ehci)->self.bandwidth_isoc_reqs++;
 
@@ -1643,7 +1633,6 @@ itd_link_urb (
                 itd_patch(ehci, itd, iso_sched, packet, uframe);
 
                 next_uframe += stream->interval;
-                stream->depth += stream->interval;
                 next_uframe &= mod - 1;
                 packet++;
 
@@ -1699,7 +1688,6 @@ itd_complete (
 
                 t = hc32_to_cpup(ehci, &itd->hw_transaction [uframe]);
                 itd->hw_transaction [uframe] = 0;
-                stream->depth -= stream->interval;
 
                 /* report transfer status */
                 if (unlikely (t & ISO_ERRS)) {
@@ -2029,7 +2017,6 @@ sitd_link_urb (
                         (stream->bEndpointAddress & USB_DIR_IN) ? "in" : "out",
                         (next_uframe >> 3) & (ehci->periodic_size - 1),
                         stream->interval, hc32_to_cpu(ehci, stream->splits));
-                stream->start = jiffies;
         }
         ehci_to_hcd(ehci)->self.bandwidth_isoc_reqs++;
 
@@ -2054,7 +2041,6 @@ sitd_link_urb (
                                 sitd);
 
                 next_uframe += stream->interval << 3;
-                stream->depth += stream->interval << 3;
         }
         stream->next_uframe = next_uframe & (mod - 1);
 
@@ -2114,7 +2100,6 @@ sitd_complete (
                 desc->actual_length = desc->length - SITD_LENGTH(t);
                 urb->actual_length += desc->actual_length;
         }
-        stream->depth -= stream->interval << 3;
 
         /* handle completion now? */
         if ((urb_index + 1) != urb->number_of_packets)
diff --git a/drivers/usb/host/ehci.h b/drivers/usb/host/ehci.h
index 2c050efd1deb..e5b9ece8a077 100644
--- a/drivers/usb/host/ehci.h
+++ b/drivers/usb/host/ehci.h
@@ -404,15 +404,12 @@ struct ehci_iso_stream {
         u32                     refcount;
         u8                      bEndpointAddress;
         u8                      highspeed;
-        u16                     depth;          /* depth in uframes */
         struct list_head        td_list;        /* queued itds/sitds */
         struct list_head        free_list;      /* list of unused itds/sitds */
         struct usb_device       *udev;
         struct usb_host_endpoint *ep;
 
         /* output of (re)scheduling */
-        unsigned long           start;          /* jiffies */
-        unsigned long           rescheduled;
         int                     next_uframe;
         __hc32                  splits;