linux-kernel - Re: [PATCH v2 2/2] usb: gadget: f_mass_storage: Make us pass USBCV MSC Compliance tests

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Message-ID: <op.vu7nbzdb3l0zgt@mnazarewicz-glaptop>
Date:	Mon, 09 May 2011 12:56:13 +0200
From:	"Michal Nazarewicz" <mina86@...a86.com>
To:	gregkh@...e.de, "Roger Quadros" <roger.quadros@...ia.com>
Cc:	stern@...land.harvard.edu, m-sonasath@...com,
	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/2] usb: gadget: f_mass_storage: Make us pass USBCV
 MSC Compliance tests

On Mon, 09 May 2011 12:08:07 +0200, Roger Quadros wrote:
> Defer the SET_CONFIG and SET_INTERFACE control transfer's data/status
> stages till we are ready to process new CBW from the host. This way we
> ensure that we don't loose any CBW during MSC compliance tests and cause
> lock up.
>
> Signed-off-by: Roger Quadros <roger.quadros@...ia.com>

Acked-by: Michal Nazarewicz <mina86@...a86.com>

> @@ -2468,7 +2469,7 @@ static int fsg_set_alt(struct usb_function *f,  
> unsigned intf, unsigned alt)
>  	struct fsg_dev *fsg = fsg_from_func(f);
>  	fsg->common->new_fsg = fsg;
>  	raise_exception(fsg->common, FSG_STATE_CONFIG_CHANGE);
> -	return 0;
> +	return USB_GADGET_DELAYED_STATUS;
>  }
> static void fsg_disable(struct usb_function *f)

Just a side note, an idea that came to my mind: How about instead
of creating meaning of an arbitrary return value, creating a
usb_composite_setup_pause() or usb_composite_setup_delay()
function?  It would be more symmetrical that way.  Just an idea,
feel free to ignore.

-- 
Best regards,                                         _     _
.o. | Liege of Serenely Enlightened Majesty of      o' \,=./ `o
..o | Computer Science,  Michal "mina86" Nazarewicz    (o o)
ooo +-----<email/xmpp: mnazarewicz@...gle.com>-----ooO--(_)--Ooo--
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