From f443ddf1057776ed99d5006bbbefb018fcf7ce3a Mon Sep 17 00:00:00 2001 From: Alan Stern <stern@rowland.harvard.edu> Date: Mon, 31 Jul 2006 10:16:24 -0400 Subject: [PATCH] USB: UHCI: Don't test the Short Packet Detect bit Apparently some UHCI controllers change the value of the Short Packet Detect (SPD) bit in the TD status word -- presumably when they receive a short packet. This patch (as759) changes uhci-hcd to avoid assuming that the bit is unchanged; in fact, the driver no longer looks at SPD at all. This fixes the second problem reported in Bugzilla #6752. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> --- drivers/usb/host/uhci-q.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/usb/host/uhci-q.c b/drivers/usb/host/uhci-q.c index c9d72ac0a1d77..66c3f61bc9d13 100644 --- a/drivers/usb/host/uhci-q.c +++ b/drivers/usb/host/uhci-q.c @@ -943,7 +943,9 @@ static int uhci_result_common(struct uhci_hcd *uhci, struct urb *urb) /* We received a short packet */ if (urb->transfer_flags & URB_SHORT_NOT_OK) ret = -EREMOTEIO; - else if (ctrlstat & TD_CTRL_SPD) + + /* Fixup needed only if this isn't the URB's last TD */ + else if (&td->list != urbp->td_list.prev) ret = 1; } -- GitLab