Subject: [PATCH 1/4] usb: phy: Fix deferred probing

From: [email-masked] ([email-masked])
Date: Thu, 08 Jan 2015 18:32:27 +0200

Hi,

On 01/07/2015 06:41 AM, Olof Johansson wrote:
> On Tue, Jan 6, 2015 at 7:45 AM, Maxime Ripard
> <[email-masked]> wrote:
>> Commit 1290a958d48e ("usb: phy: propagate __of_usb_find_phy()'s error on
>> failure") actually broke the deferred probing mechanism, since it now returns
>> EPROBE_DEFER only when the try_module_get call fails, but not when the phy
>> lookup does.
>>
>> All the other similar functions seem to return ENODEV when try_module_get
>> fails, and the error code of either __usb_find_phy or __of_usb_find_phy
>> otherwise.
>>
>> In order to have a consistent behaviour, and a meaningful EPROBE_DEFER, always
>> return EPROBE_DEFER when __(of_)usb_find_phy fails to look up the requested
>> phy, that will be propagated by the caller, and ENODEV if try_module_get fails.
>>
> 
> Fixes:  1290a958d48e ("usb: phy: propagate __of_usb_find_phy()'s error
> on failure")
> 
>> Signed-off-by: Maxime Ripard <[email-masked]>
> 
> This also fixes USB on tegra/trimslice here.
> 
> Tested-by: Olof Johansson <[email-masked]>
> 
> Given that the regression went in during 3.19 merge window, this
> should go in as a fix during -rc, please.

1) Pls note, there is a duplication patch https://www.mail-archive.com/linux-usb at vger.kernel.org/msg53893.html
but this one is more correct as for me. 

2) This patch fixes USB regression on Keystone 2, so

 Tested-by: Grygorii Strashko <[email-masked]>

-- 
regards,
-grygorii