diff options
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/usb/gadget.h | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h index c3a61853cd13..c540557b564b 100644 --- a/include/linux/usb/gadget.h +++ b/include/linux/usb/gadget.h | |||
| @@ -345,12 +345,13 @@ static inline int usb_ep_queue(struct usb_ep *ep, | |||
| 345 | * @ep:the endpoint associated with the request | 345 | * @ep:the endpoint associated with the request |
| 346 | * @req:the request being canceled | 346 | * @req:the request being canceled |
| 347 | * | 347 | * |
| 348 | * if the request is still active on the endpoint, it is dequeued and its | 348 | * If the request is still active on the endpoint, it is dequeued and its |
| 349 | * completion routine is called (with status -ECONNRESET); else a negative | 349 | * completion routine is called (with status -ECONNRESET); else a negative |
| 350 | * error code is returned. | 350 | * error code is returned. This is guaranteed to happen before the call to |
| 351 | * usb_ep_dequeue() returns. | ||
| 351 | * | 352 | * |
| 352 | * note that some hardware can't clear out write fifos (to unlink the request | 353 | * Note that some hardware can't clear out write fifos (to unlink the request |
| 353 | * at the head of the queue) except as part of disconnecting from usb. such | 354 | * at the head of the queue) except as part of disconnecting from usb. Such |
| 354 | * restrictions prevent drivers from supporting configuration changes, | 355 | * restrictions prevent drivers from supporting configuration changes, |
| 355 | * even to configuration zero (a "chapter 9" requirement). | 356 | * even to configuration zero (a "chapter 9" requirement). |
| 356 | */ | 357 | */ |