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authorAlan Stern <stern@rowland.harvard.edu>2009-03-05 11:01:11 -0500
committerGreg Kroah-Hartman <gregkh@suse.de>2009-03-24 16:20:36 -0700
commit7ea0a2bcfe40b1c525e63e931b7142ab22b64269 (patch)
tree90f5853d6a4685a00baf895eafe1098bb8e19f3c
parent66760169492445395c530c812443f58e2cfdb3dc (diff)
USB: uhci: don't use pseudo negative values
The code in uhci-q.c doesn't have to use pseudo-negative values. I did it that way because it was easy and because it would give the expected output during debugging. But it doesn't have to work that way. Here's another approach. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Cc: Roel Kluin <roel.kluin@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
-rw-r--r--drivers/usb/host/uhci-debug.c4
-rw-r--r--drivers/usb/host/uhci-q.c11
2 files changed, 7 insertions, 8 deletions
diff --git a/drivers/usb/host/uhci-debug.c b/drivers/usb/host/uhci-debug.c
index 20cc58b9780..e52b954dda4 100644
--- a/drivers/usb/host/uhci-debug.c
+++ b/drivers/usb/host/uhci-debug.c
@@ -118,7 +118,9 @@ static int uhci_show_urbp(struct urb_priv *urbp, char *buf, int len, int space)
}
out += sprintf(out, "%s%s", ptype, (urbp->fsbr ? " FSBR" : ""));
- out += sprintf(out, " Actlen=%d", urbp->urb->actual_length);
+ out += sprintf(out, " Actlen=%d%s", urbp->urb->actual_length,
+ (urbp->qh->type == USB_ENDPOINT_XFER_CONTROL ?
+ "-8" : ""));
if (urbp->urb->unlinked)
out += sprintf(out, " Unlinked=%d", urbp->urb->unlinked);
diff --git a/drivers/usb/host/uhci-q.c b/drivers/usb/host/uhci-q.c
index 58f87367914..3e5807d14ff 100644
--- a/drivers/usb/host/uhci-q.c
+++ b/drivers/usb/host/uhci-q.c
@@ -899,8 +899,6 @@ static int uhci_submit_control(struct uhci_hcd *uhci, struct urb *urb,
}
if (qh->state != QH_STATE_ACTIVE)
qh->skel = skel;
-
- urb->actual_length = -8; /* Account for the SETUP packet */
return 0;
nomem:
@@ -1494,11 +1492,10 @@ __acquires(uhci->lock)
if (qh->type == USB_ENDPOINT_XFER_CONTROL) {
- /* urb->actual_length < 0 means the setup transaction didn't
- * complete successfully. Either it failed or the URB was
- * unlinked first. Regardless, don't confuse people with a
- * negative length. */
- urb->actual_length = max(urb->actual_length, 0);
+ /* Subtract off the length of the SETUP packet from
+ * urb->actual_length.
+ */
+ urb->actual_length -= min_t(u32, 8, urb->actual_length);
}
/* When giving back the first URB in an Isochronous queue,