Re: [RESEND/PATCH 5/6] USB: musb-gadget: complete request only if data is transfered over

[Sergei Shtylyov <sshtylyov@mvista.com>]

Hello.

tom.leiming@gmail.com wrote:

> From: Ming Lei <tom.leiming@gmail.com>

> Complete the current request only if the data transfer is over.

> Signed-off-by: Ming Lei <tom.leiming@gmail.com>
> Cc: David Brownell <dbrownell@users.sourceforge.net>
> Cc: Felipe Balbi <me@felipebalbi.com>
> Cc: Anand Gadiyar <gadiyar@ti.com>
> Cc: Mike Frysinger <vapier@gentoo.org>
> Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com>
> ---
>  drivers/usb/musb/musb_gadget.c |   16 ++++++++--------
>  1 files changed, 8 insertions(+), 8 deletions(-)

> diff --git a/drivers/usb/musb/musb_gadget.c b/drivers/usb/musb/musb_gadget.c
> index f3ee04f..fa826f9 100644
> --- a/drivers/usb/musb/musb_gadget.c
> +++ b/drivers/usb/musb/musb_gadget.c
> @@ -501,14 +501,14 @@ void musb_g_tx(struct musb *musb, u8 epnum)
>  				request->zero = 0;
>  			}
>  
> -			/* ... or if not, then complete it. */
> -			musb_g_giveback(musb_ep, request, 0);
> -
> -			request = musb_ep->desc ? next_request(musb_ep) : NULL;
> -			if (!request) {
> -				DBG(4, "%s idle now\n",
> -					musb_ep->end_point.name);
> -				return;
> +			if (request->actual == request->length) {

    But why not modify the conditional above all that code, just excluding 
'is_dma' from it. This conditional already includes (request->actual == 
request->length) check. Please recast this patch.

> +				musb_g_giveback(musb_ep, request, 0);
> +				request = musb_ep->desc ? next_request(musb_ep) : NULL;
> +				if (!request) {
> +					DBG(4, "%s idle now\n",
> +						musb_ep->end_point.name);
> +					return;
> +				}
>  			}
>  		}
>  

WBR, Sergei