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USB: xhci: Check URB_SHORT_NOT_OK before setting short packet status.

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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 <sarah.a.sharp@linux.intel.com>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Sarah Sharp 2009-08-28 14:28:15 -07:00 committed by Greg Kroah-Hartman
parent 99eb32db45
commit 204970a4bb
1 changed files with 8 additions and 2 deletions
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10
drivers/usb/host/xhci-ring.c
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@ -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 {