linux-kernel - Re: 2.6.21-rc6-mm1 USB related boot hang

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Date:	Thu, 12 Apr 2007 22:25:19 +0200
From:	Helge Hafting <helgehaf@...el.hist.no>
To:	Jiri Kosina <jikos@...os.cz>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, linux-usb-devel@...ts.sourceforge.net
Subject: Re: 2.6.21-rc6-mm1 USB related boot hang

On Thu, Apr 12, 2007 at 08:32:50PM +0200, Jiri Kosina wrote:
> OK, so it hangs somewhere nearby usbhid's hid_init(), and the 
> usb_register() has been already invoked. Could you please apply the 
> superstupid patch below and send me the output up to the point it hangs? I 
> am curious to know whether it hangs somewhere inside usb_register(), or 
> elsewhere.
> 
> Thanks.
>
Are you sure this is the correct patch - against 2.6.21-rc6-mm1 ?
Hunk 1 out of 1 failed . . .
 
> diff --git a/drivers/hid/usbhid/hid-core.c b/drivers/hid/usbhid/hid-core.c
> index 1ddca31..d930f62 100644
> --- a/drivers/hid/usbhid/hid-core.c
> +++ b/drivers/hid/usbhid/hid-core.c
> @@ -1550,15 +1550,22 @@ static int __init hid_init(void)
>  	retval = hiddev_init();
>  	if (retval)
>  		goto hiddev_init_fail;
> +	printk(KERN_DEBUG "hid_init: before usb_register()\n");
>  	retval = usb_register(&hid_driver);
> +	printk(KERN_DEBUG "hid_init: after usb_register(), retuned %d\n", retval);
>  	if (retval)
>  		goto usb_register_fail;
>  	info(DRIVER_VERSION ":" DRIVER_DESC);
>  
> +	printk(KERN_DEBUG "hid_init: returning 0\n");
> +	dump_stack();
>  	return 0;
>  usb_register_fail:
> +	printk(KERN_DEBUG "hid_init: calling hiddev_exit()\n");
>  	hiddev_exit();
>  hiddev_init_fail:
> +	printk(KERN_DEBUG "hid_init: returning %d\n", retval);
> +	dump_stack();
>  	return retval;
>  }
>  
-
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