linux-kernel - Re: [linux-usb-devel] [PATCH] USB: consolidate error values from EHCI, UHCI and OHCI

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Message-Id: <200609181909.53498.david-b@pacbell.net>
Date:	Mon, 18 Sep 2006 19:09:52 -0700
From:	David Brownell <david-b@...bell.net>
To:	linux-usb-devel@...ts.sourceforge.net
Cc:	Jiri Kosina <jikos@...os.cz>, Andrew Morton <akpm@...l.org>,
	dbrownell@...rs.sourceforge.net, weissg@...nna.at,
	linux-kernel@...r.kernel.org
Subject: Re: [linux-usb-devel] [PATCH] USB: consolidate error values from EHCI, UHCI and OHCI _suspend()

On Monday 18 September 2006 6:44 pm, Jiri Kosina wrote:
> Hi,
> 
> EHCI, UHCI and OHCI USB host drivers are not consistent when returining 
> error values from their _suspend() functions, in case that the device is 
> not in suspended state. This could confuse users, so let all three of them 
> return -EBUSY.

Shouldn't you also update uhci_suspend()?  Currently it
just ignores hcd->state ...


> Patch against 2.6.18-rc6-mm2.
> 
> Signed-off-by: Jiri Kosina <jikos@...os.cz>
> 
> --- linux-2.6.18-rc6-mm2.orig/drivers/usb/host/ehci-pci.c	2006-09-14 16:20:48.000000000 +0200
> +++ linux-2.6.18-rc6-mm2/drivers/usb/host/ehci-pci.c	2006-09-19 03:20:22.000000000 +0200
> @@ -232,7 +232,7 @@ static int ehci_pci_suspend(struct usb_h
>  	 */
>  	spin_lock_irqsave (&ehci->lock, flags);
>  	if (hcd->state != HC_STATE_SUSPENDED) {
> -		rc = -EINVAL;
> +		rc = -EBUSY;
>  		goto bail;
>  	}
>  	writel (0, &ehci->regs->intr_enable);
> --- linux-2.6.18-rc6-mm2.orig/drivers/usb/host/ohci-pci.c	2006-09-14 16:20:48.000000000 +0200
> +++ linux-2.6.18-rc6-mm2/drivers/usb/host/ohci-pci.c	2006-09-19 03:36:35.000000000 +0200
> @@ -130,7 +130,7 @@ static int ohci_pci_suspend (struct usb_
>  	 */
>  	spin_lock_irqsave (&ohci->lock, flags);
>  	if (hcd->state != HC_STATE_SUSPENDED) {
> -		rc = -EINVAL;
> +		rc = -EBUSY;
>  		goto bail;
>  	}
>  	ohci_writel(ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable);
> 
> -- 
> Jiri Kosina
> 
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