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isp1760-hcd: fix possible memory leak if urb could not be enqueued 

After packetize_urb was called, we could still run into an error path
and will not hand over the prepared qtd to the qtd_list. Make sure to
free the prepared qtd in that case to avoid memory leaks.

Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Michael Grzeschik 2012-04-05 14:56:10 +02:00 committed by Greg Kroah-Hartman
parent 8cb2268001
commit 8788fa0344
1 changed files with 5 additions and 1 deletions
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6
drivers/usb/host/isp1760-hcd.c
View File

@ -1562,11 +1562,14 @@ static int isp1760_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) {
retval = -ESHUTDOWN;
qtd_list_free(&new_qtds);
goto out;
}
retval = usb_hcd_link_urb_to_ep(hcd, urb);
if (retval)
if (retval) {
qtd_list_free(&new_qtds);
goto out;
}
qh = urb->ep->hcpriv;
if (qh) {
@ -1584,6 +1587,7 @@ static int isp1760_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
if (!qh) {
retval = -ENOMEM;
usb_hcd_unlink_urb_from_ep(hcd, urb);
qtd_list_free(&new_qtds);
goto out;
}
list_add_tail(&qh->qh_list, ep_queue);