| From eaa358c7790338d83bb6a31258bdc077de120414 Mon Sep 17 00:00:00 2001 |
| From: Felipe Balbi <felipe.balbi@linux.intel.com> |
| Date: Mon, 26 Mar 2018 13:14:46 +0300 |
| Subject: usb: gadget: udc: core: update usb_ep_queue() documentation |
| |
| From: Felipe Balbi <felipe.balbi@linux.intel.com> |
| |
| commit eaa358c7790338d83bb6a31258bdc077de120414 upstream. |
| |
| Mention that ->complete() should never be called from within |
| usb_ep_queue(). |
| |
| Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com> |
| Cc: stable <stable@vger.kernel.org> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| |
| --- |
| drivers/usb/gadget/udc/core.c | 3 +++ |
| 1 file changed, 3 insertions(+) |
| |
| --- a/drivers/usb/gadget/udc/core.c |
| +++ b/drivers/usb/gadget/udc/core.c |
| @@ -248,6 +248,9 @@ EXPORT_SYMBOL_GPL(usb_ep_free_request); |
| * arranges to poll once per interval, and the gadget driver usually will |
| * have queued some data to transfer at that time. |
| * |
| + * Note that @req's ->complete() callback must never be called from |
| + * within usb_ep_queue() as that can create deadlock situations. |
| + * |
| * Returns zero, or a negative error code. Endpoints that are not enabled |
| * report errors; errors will also be |
| * reported when the usb peripheral is disconnected. |
