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USB: whci-hcd: handle early deletion of endpoints

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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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
drivers/usb/host/whci/asl.c
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);

20
drivers/usb/host/whci/pzl.c
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);