diff options
Diffstat (limited to 'drivers/usb/gadget/pxa27x_udc.h')
| -rw-r--r-- | drivers/usb/gadget/pxa27x_udc.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/usb/gadget/pxa27x_udc.h b/drivers/usb/gadget/pxa27x_udc.h index e25225e26586..ff61e4866e8a 100644 --- a/drivers/usb/gadget/pxa27x_udc.h +++ b/drivers/usb/gadget/pxa27x_udc.h @@ -318,6 +318,11 @@ struct udc_usb_ep { * @queue: requests queue * @lock: lock to pxa_ep data (queues and stats) * @enabled: true when endpoint enabled (not stopped by gadget layer) + * @in_handle_ep: number of recursions of handle_ep() function + * Prevents deadlocks or infinite recursions of types : + * irq->handle_ep()->req_done()->req.complete()->pxa_ep_queue()->handle_ep() + * or + * pxa_ep_queue()->handle_ep()->req_done()->req.complete()->pxa_ep_queue() * @idx: endpoint index (1 => epA, 2 => epB, ..., 24 => epX) * @name: endpoint name (for trace/debug purpose) * @dir_in: 1 if IN endpoint, 0 if OUT endpoint @@ -346,6 +351,7 @@ struct pxa_ep { spinlock_t lock; /* Protects this structure */ /* (queues, stats) */ unsigned enabled:1; + unsigned in_handle_ep:1; unsigned idx:5; char *name; |