linux-kernel - Re: [PATCH v4 1/1] usb: ulpi: ulpi_init should be executed in subsys

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Date:	Thu, 28 May 2015 08:50:12 +0800
From:	"Lu, Baolu" <baolu.lu@...ux.intel.com>
To:	David Cohen <david.a.cohen@...ux.intel.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
CC:	Heikki Krogerus <heikki.krogerus@...ux.intel.com>, balbi@...com,
	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
	qiuxu.zhuo@...el.com
Subject: Re: [PATCH v4 1/1] usb: ulpi: ulpi_init should be executed in subsys_initcall



On 05/28/2015 12:53 AM, David Cohen wrote:
> Hi,
>
> On Tue, May 26, 2015 at 07:37:02PM -0700, Greg Kroah-Hartman wrote:
>> On Wed, May 27, 2015 at 09:45:37AM +0800, Lu Baolu wrote:
>>> Phy drivers and the ulpi interface providers depend on the
>>> registration of the ulpi bus.  Ulpi registers the bus in
>>> module_init(). This could cause unnecessary probe delays.
>> What do you mean by "probe delays"?
> I believe he meant the bus users' probe delays. i.e. unnecessary
> -EPROBE_DEFER happening on ulpi_drivers in case they're registered
> before ulpi bus itself.
>
> Is that correct, Baolu?

Yes.

>
> Br, David
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