diff options
| author | Felipe Balbi <felipe.balbi@linux.intel.com> | 2018-03-26 13:14:46 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-04-24 09:34:09 +0200 |
| commit | ba260ce74cb8acef791563a7d3f1445fe06d6805 (patch) | |
| tree | d4eed66986cc95cdd3d8c797b15b357a8d11fb67 /drivers/usb/gadget/udc | |
| parent | a576d7fea68be666b2a0d2104ddf936d587e65de (diff) | |
usb: gadget: udc: core: update usb_ep_queue() documentation
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>
Diffstat (limited to 'drivers/usb/gadget/udc')
| -rw-r--r-- | drivers/usb/gadget/udc/core.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/usb/gadget/udc/core.c b/drivers/usb/gadget/udc/core.c index 7d658565b20f..188961780b8a 100644 --- 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. |