linux-kernel - Re: [PATCH 2/4] usb: Introduce Xen pvUSB frontend

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Message-ID: <1424959760.27644.26.camel@linux-0dmf.site>
Date:	Thu, 26 Feb 2015 15:09:20 +0100
From:	Oliver Neukum <oneukum@...e.de>
To:	Juergen Gross <jgross@...e.com>
Cc:	linux-kernel@...r.kernel.org, xen-devel@...ts.xensource.com,
	konrad.wilk@...cle.com, david.vrabel@...rix.com,
	boris.ostrovsky@...cle.com, linux-usb@...r.kernel.org,
	gregkh@...uxfoundation.org, cyliu@...e.com
Subject: Re: [PATCH 2/4] usb: Introduce Xen pvUSB frontend

On Thu, 2015-02-26 at 14:35 +0100, Juergen Gross wrote:
> +
> +               /* reset completion */
> +               if ((info->ports[wIndex].status &
> USB_PORT_STAT_RESET) != 0 &&
> +                   time_after_eq(jiffies,
> info->ports[wIndex].timeout)) {
> +                       info->ports[wIndex].status |=
> +                               USB_PORT_STAT_C_RESET << 16;
> +                       info->ports[wIndex].status &=
> ~USB_PORT_STAT_RESET;
> +
> +                       if (info->devices[wIndex].status !=
> +                           USB_STATE_NOTATTACHED) {
> +                               info->ports[wIndex].status |=
> +                                       USB_PORT_STAT_ENABLE;
> +                               info->devices[wIndex].status =
> +                                       USB_STATE_DEFAULT;
> +                       }
> +
> +                       switch (info->devices[wIndex].speed) {
> +                       case USB_SPEED_LOW:
> +                               info->ports[wIndex].status |=
> +                                       USB_PORT_STAT_LOW_SPEED;
> +                               break;
> +                       case USB_SPEED_HIGH:
> +                               info->ports[wIndex].status |=
> +                                       USB_PORT_STAT_HIGH_SPEED;
> +                               break;
> +                       default:
> +                               break;
> +                       }
> +               }
> +
> +               ((u16 *)buf)[0] =
> cpu_to_le16(info->ports[wIndex].status);
> +               ((u16 *)buf)[1] =
> cpu_to_le16(info->ports[wIndex].status >> 16);

Why in two chunks?
	Regards
		Oliver
> +               break;


-- 
Oliver Neukum <oneukum@...e.de>

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