This patch (as872) adds some WARN_ON()s to various error checks which
are never supposed to fail. Unsettlingly, one of them has shown up in
a user's log! Maybe making the warning more visible and having the
call-stack information available will help pinpoint the source of the
problem.
Signed-off-by: Alan Stern <[EMAIL PROTECTED]>
---
Index: usb-2.6/drivers/usb/host/uhci-q.c
===================================================================
--- usb-2.6.orig/drivers/usb/host/uhci-q.c
+++ usb-2.6/drivers/usb/host/uhci-q.c
@@ -123,10 +123,14 @@ static struct uhci_td *uhci_alloc_td(str
static void uhci_free_td(struct uhci_hcd *uhci, struct uhci_td *td)
{
- if (!list_empty(&td->list))
+ if (!list_empty(&td->list)) {
dev_warn(uhci_dev(uhci), "td %p still in list!\n", td);
- if (!list_empty(&td->fl_list))
+ WARN_ON(1);
+ }
+ if (!list_empty(&td->fl_list)) {
dev_warn(uhci_dev(uhci), "td %p still in fl_list!\n", td);
+ WARN_ON(1);
+ }
dma_pool_free(uhci->td_pool, td, td->dma_handle);
}
@@ -291,8 +295,10 @@ static struct uhci_qh *uhci_alloc_qh(str
static void uhci_free_qh(struct uhci_hcd *uhci, struct uhci_qh *qh)
{
WARN_ON(qh->state != QH_STATE_IDLE && qh->udev);
- if (!list_empty(&qh->queue))
+ if (!list_empty(&qh->queue)) {
dev_warn(uhci_dev(uhci), "qh %p list not empty!\n", qh);
+ WARN_ON(1);
+ }
list_del(&qh->node);
if (qh->udev) {
@@ -740,9 +746,11 @@ static void uhci_free_urb_priv(struct uh
{
struct uhci_td *td, *tmp;
- if (!list_empty(&urbp->node))
+ if (!list_empty(&urbp->node)) {
dev_warn(uhci_dev(uhci), "urb %p still on QH's list!\n",
urbp->urb);
+ WARN_ON(1);
+ }
list_for_each_entry_safe(td, tmp, &urbp->td_list, list) {
uhci_remove_td_from_urbp(td);
-------------------------------------------------------------------------
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