linux-kernel - Re: [PATCH v3 1/1] usb: ulpi: ulpi_init should be executed in subsys

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Message-ID: <20150522160845.GA31627@psi-dev26.jf.intel.com>
Date:	Fri, 22 May 2015 09:08:45 -0700
From:	David Cohen <david.a.cohen@...ux.intel.com>
To:	Lu Baolu <baolu.lu@...ux.intel.com>
Cc:	Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 1/1] usb: ulpi: ulpi_init should be executed in
 subsys_initcall

Hi,

On Fri, May 22, 2015 at 07:29:15PM +0800, Lu Baolu wrote:
> Phy drivers and the ulpi interface providers depend on the
> registeration of the ulpi bus.  Ulpi registers the bus in
> module_init(). This could result in a load order issue, i.e.

It's still not an issue :(
I'd say "unnecessary probe delays".

But of cource it's Felipe's call :) Description looks better now.

BR, David

> ulpi phy drivers or the ulpi interface providers loading
> before the bus registeration.
> 
> This patch fixes this load order issue by putting ulpi_init
> in subsys_initcall().
> 
> Reported-by: Zhuo Qiuxu <qiuxu.zhuo@...el.com>
> Signed-off-by: Lu Baolu <baolu.lu@...ux.intel.com>
> ---
>  drivers/usb/common/ulpi.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/usb/common/ulpi.c b/drivers/usb/common/ulpi.c
> index 0e6f968..01c0c04 100644
> --- a/drivers/usb/common/ulpi.c
> +++ b/drivers/usb/common/ulpi.c
> @@ -242,7 +242,7 @@ static int __init ulpi_init(void)
>  {
>  	return bus_register(&ulpi_bus);
>  }
> -module_init(ulpi_init);
> +subsys_initcall(ulpi_init);
>  
>  static void __exit ulpi_exit(void)
>  {
> -- 
> 2.1.4
> 
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