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authorAlan Stern <stern@rowland.harvard.edu>2009-03-05 17:01:11 +0100
committerGreg Kroah-Hartman <gregkh@suse.de>2009-03-25 00:20:36 +0100
commit7ea0a2bcfe40b1c525e63e931b7142ab22b64269 (patch)
tree90f5853d6a4685a00baf895eafe1098bb8e19f3c /drivers/usb/host/uhci-q.c
parentUSB: TWL: disable VUSB regulators when cable unplugged (diff)
downloadlinux-7ea0a2bcfe40b1c525e63e931b7142ab22b64269.tar.xz
linux-7ea0a2bcfe40b1c525e63e931b7142ab22b64269.zip
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>
Diffstat (limited to 'drivers/usb/host/uhci-q.c')
-rw-r--r--drivers/usb/host/uhci-q.c11
1 files changed, 4 insertions, 7 deletions
diff --git a/drivers/usb/host/uhci-q.c b/drivers/usb/host/uhci-q.c
index 58f873679145..3e5807d14ffb 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,