linux-kernel - Re: [PATCH] usb: dwc3: core: Don't try to get PHYs during suspend/resume

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Date:   Thu, 11 Jan 2018 10:25:35 +0200
From:   Felipe Balbi <balbi@...nel.org>
To:     Roger Quadros <rogerq@...com>
Cc:     vigneshr@...com, gregkh@...uxfoundation.org,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        "linux-stable # \= v4 . 13" <stable@...r.kernel.org>
Subject: Re: [PATCH] usb: dwc3: core: Don't try to get PHYs during suspend/resume


Hi,

Roger Quadros <rogerq@...com> writes:
>>>> -	ret = dwc3_core_soft_reset(dwc);
>>>> +	ret = dwc3_core_get_phy(dwc);
>>>
>>> we can get_phy in dwc3_core_init() as it will get called on resume().
>>> This was the $subject of this patch.
>> 
>> indeed. thanks :-)
>> 
>
> oops sorry. I meant we can't call dwc3_core_get_phy() in dwc3_core_init(). :P

bit of a chicken-and-egg problem. We need to setup the PHY interface
before getting the PHYs, but can't get PHY during resume. Maybe the best
way here would be to check for the pointers being valid. Something like:

if (!phy)
	get_phy();

-- 
balbi

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