USB: whci-hcd: handle early deletion of endpoints

If an endpoint is deleted before it's been fully added to the hardware
list, the associated qset will not be fully initialized and an oops will
occur when complete(&qset->remove_complete) is called.  This can happen
if a queued URB is cancelled.

Fix this by only removing the qset from the hardware list if the
cancelled URB had qTDs.

Signed-off-by: David Vrabel <david.vrabel@csr.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
David Vrabel 2009-10-12 15:45:15 +00:00 committed by Greg Kroah-Hartman
parent b41ecf9a80
commit 171b37ee95
2 changed files with 25 additions and 14 deletions

View File

@ -305,6 +305,7 @@ int asl_urb_dequeue(struct whc *whc, struct urb *urb, int status)
struct whc_urb *wurb = urb->hcpriv;
struct whc_qset *qset = wurb->qset;
struct whc_std *std, *t;
bool has_qtd = false;
int ret;
unsigned long flags;
@ -315,17 +316,21 @@ int asl_urb_dequeue(struct whc *whc, struct urb *urb, int status)
goto out;
list_for_each_entry_safe(std, t, &qset->stds, list_node) {
if (std->urb == urb)
if (std->urb == urb) {
if (std->qtd)
has_qtd = true;
qset_free_std(whc, std);
else
} else
std->qtd = NULL; /* so this std is re-added when the qset is */
}
asl_qset_remove(whc, qset);
wurb->status = status;
wurb->is_async = true;
queue_work(whc->workqueue, &wurb->dequeue_work);
if (has_qtd) {
asl_qset_remove(whc, qset);
wurb->status = status;
wurb->is_async = true;
queue_work(whc->workqueue, &wurb->dequeue_work);
} else
qset_remove_urb(whc, qset, urb, status);
out:
spin_unlock_irqrestore(&whc->lock, flags);

View File

@ -333,6 +333,7 @@ int pzl_urb_dequeue(struct whc *whc, struct urb *urb, int status)
struct whc_urb *wurb = urb->hcpriv;
struct whc_qset *qset = wurb->qset;
struct whc_std *std, *t;
bool has_qtd = false;
int ret;
unsigned long flags;
@ -343,17 +344,22 @@ int pzl_urb_dequeue(struct whc *whc, struct urb *urb, int status)
goto out;
list_for_each_entry_safe(std, t, &qset->stds, list_node) {
if (std->urb == urb)
if (std->urb == urb) {
if (std->qtd)
has_qtd = true;
qset_free_std(whc, std);
else
} else
std->qtd = NULL; /* so this std is re-added when the qset is */
}
pzl_qset_remove(whc, qset);
wurb->status = status;
wurb->is_async = false;
queue_work(whc->workqueue, &wurb->dequeue_work);
if (has_qtd) {
pzl_qset_remove(whc, qset);
update_pzl_hw_view(whc);
wurb->status = status;
wurb->is_async = false;
queue_work(whc->workqueue, &wurb->dequeue_work);
} else
qset_remove_urb(whc, qset, urb, status);
out:
spin_unlock_irqrestore(&whc->lock, flags);