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| author | Felipe Balbi <felipe.balbi@linux.intel.com> | 2018-03-26 13:14:46 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-03-26 13:22:09 +0200 |
| commit | eaa358c7790338d83bb6a31258bdc077de120414 (patch) | |
| tree | 66a82cb2d8793cfbfc52affdcf8c4a09e6dee864 /drivers/usb | |
| parent | 53d473fc1e38751b5369373423d58c86a3444b3b (diff) | |
| download | lwn-eaa358c7790338d83bb6a31258bdc077de120414.tar.gz lwn-eaa358c7790338d83bb6a31258bdc077de120414.zip | |
usb: gadget: udc: core: update usb_ep_queue() documentation
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')
| -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 50988b21a21b..842814bc0e4f 100644 --- a/drivers/usb/gadget/udc/core.c +++ b/drivers/usb/gadget/udc/core.c @@ -238,6 +238,9 @@ 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. |