linux-kernel - Re: [PATCH v2 2/3] usb: gadget: f_midi: free usb request when done

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Date:	Wed, 23 Sep 2015 16:12:56 +0300
From:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:	"Felipe F. Tonello" <eu@...ipetonello.com>,
	linux-usb@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org,
	Peter Chen <Peter.Chen@...escale.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Felipe Balbi <balbi@...com>,
	Andrzej Pietrasiewicz <andrzej.p@...sung.com>
Subject: Re: [PATCH v2 2/3] usb: gadget: f_midi: free usb request when done

Hello.

On 9/23/2015 3:01 PM, 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 <eu@...ipetonello.com>
> ---
>
> Changes in v2:
>   * Re enqueue not fully completed requests, instead of read ALSA buffers.
>
>   drivers/usb/gadget/function/f_midi.c | 10 ++++++----
>   1 file changed, 6 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/usb/gadget/function/f_midi.c b/drivers/usb/gadget/function/f_midi.c
> index edb84ca..62356cf 100644
> --- a/drivers/usb/gadget/function/f_midi.c
> +++ b/drivers/usb/gadget/function/f_midi.c
> @@ -256,10 +256,12 @@ f_midi_complete(struct usb_ep *ep, struct usb_request *req)
>   			/* We received stuff. req is queued again, below */
>   			f_midi_handle_out_data(ep, 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);
> -			return;
> +			/* Our transmit completed. If there is no more to go,
> +			   don't queue it again. */

    The preferred multi-line comment style is this:

/*
  * bla
  * bla
  */

MBR, Sergei

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