From 204970a4bb2f584afc430ae330cd44aee329cea4 Mon Sep 17 00:00:00 2001 From: Sarah Sharp Date: Fri, 28 Aug 2009 14:28:15 -0700 Subject: [PATCH] USB: xhci: Check URB_SHORT_NOT_OK before setting short packet status. Make sure that the driver that submitted the URB considers a short packet an error before setting -EREMOTEIO during a short control transfer. Signed-off-by: Sarah Sharp Cc: stable Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/xhci-ring.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c index b4fab00..d264f9a 100644 --- a/drivers/usb/host/xhci-ring.c +++ b/drivers/usb/host/xhci-ring.c @@ -991,7 +991,10 @@ static int handle_tx_event(struct xhci_hcd *xhci, break; case COMP_SHORT_TX: xhci_warn(xhci, "WARN: short transfer on control ep\n"); - status = -EREMOTEIO; + if (td->urb->transfer_flags & URB_SHORT_NOT_OK) + status = -EREMOTEIO; + else + status = 0; break; case COMP_BABBLE: /* The 0.96 spec says a babbling control endpoint @@ -1034,7 +1037,10 @@ static int handle_tx_event(struct xhci_hcd *xhci, if (event_trb == td->last_trb) { if (td->urb->actual_length != 0) { /* Don't overwrite a previously set error code */ - if (status == -EINPROGRESS || status == 0) + if ((status == -EINPROGRESS || + status == 0) && + (td->urb->transfer_flags + & URB_SHORT_NOT_OK)) /* Did we already see a short data stage? */ status = -EREMOTEIO; } else { -- 2.7.4