linux-kernel - Re: [PATCH v2] phy: phy-twl4030-usb: fix denied runtime access

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Message-ID: <20190220223132.GV15711@atomide.com>
Date:   Wed, 20 Feb 2019 14:31:32 -0800
From:   Tony Lindgren <tony@...mide.com>
To:     Andreas Kemnade <andreas@...nade.info>
Cc:     Dmitry Torokhov <dmitry.torokhov@...il.com>, kishon@...com,
        lee.jones@...aro.org, daniel.thompson@...aro.org,
        wsa@...-dreams.de, linux-omap@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Discussions about the Letux Kernel 
        <letux-kernel@...nphoenux.org>
Subject: Re: [PATCH v2] phy: phy-twl4030-usb: fix denied runtime access

* Andreas Kemnade <andreas@...nade.info> [180922 09:48]:
> When runtime is not enabled, pm_runtime_get_sync() returns -EACCESS,
> the counter will be incremented but the resume callback not called,
> so enumeration and charging will not start properly.
> To avoid that happen, disable irq on suspend and recheck on resume.
> 
> Practically this happens when the device is woken up from suspend by
> plugging in usb.
> 
> Signed-off-by: Andreas Kemnade <andreas@...nade.info>
> ---
> Changes in v2:
> * use pm suspend/resume callback instead of delayed_work
>   as suggested by Dmitry

Hmm it just occurred to me that this issue too might be fixed with commit
c6e2bd956936 ("i2c: omap: Use noirq system sleep pm ops to idle device
for suspend"). Andreas, care to check? That is if this is still an
issue.

Regards,

Tony