On Tue, Sep 22, 2015 at 07:59:09PM +0100, Felipe F. Tonello wrote:
> req->actual == req->length means that there is no data left to enqueue,
> so free the request.
>
> Signed-off-by: Felipe F. Tonello <e...@felipetonello.com>
> ---
> drivers/usb/gadget/function/f_midi.c | 5 ++++-
> 1 file changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/usb/gadget/function/f_midi.c
> b/drivers/usb/gadget/function/f_midi.c
> index edb84ca..e92aff5 100644
> --- a/drivers/usb/gadget/function/f_midi.c
> +++ b/drivers/usb/gadget/function/f_midi.c
> @@ -258,7 +258,10 @@ f_midi_complete(struct usb_ep *ep, struct usb_request
> *req)
> } else if (ep == midi->in_ep) {
> /* Our transmit completed. See if there's more to go.
> * f_midi_transmit eats req, don't queue it again. */
> - f_midi_transmit(midi, req);
> + if (req->actual < req->length)
> + f_midi_transmit(midi, req);
> + else
> + free_ep_req(ep, req);
> return;
> }
It is incorrect, if no reqeust in queue, how device knows when
the host sends data?
--
Best Regards,
Peter Chen
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