linux-kernel - Re: [PATCH v2 1/3] phy: amlogic: phy-meson-gxl-usb2: fix shared reset controller use

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Message-ID: <CAFBinCARfW9wtLTA=siqCH_bhF8D_CLHxU9maM+Y6p_6njGOaQ@mail.gmail.com>
Date:   Sat, 5 Dec 2020 22:53:25 +0100
From:   Martin Blumenstingl <martin.blumenstingl@...glemail.com>
To:     Amjad Ouled-Ameur <aouledameur@...libre.com>
Cc:     Kevin Hilman <khilman@...libre.com>,
        Felipe Balbi <balbi@...nel.org>, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Philipp Zabel <p.zabel@...gutronix.de>,
        linux-amlogic@...ts.infradead.org,
        Jerome Brunet <jbrunet@...libre.com>
Subject: Re: [PATCH v2 1/3] phy: amlogic: phy-meson-gxl-usb2: fix shared reset
 controller use

On Tue, Dec 1, 2020 at 8:01 PM Amjad Ouled-Ameur
<aouledameur@...libre.com> wrote:
>
> Use reset_control_rearm() call if an error occurs in case
> phy_meson_gxl_usb2_init() fails after reset() has been called ; or in case
> phy_meson_gxl_usb2_exit() is called i.e the resource is no longer used
> and the reset line may be triggered again by other devices.
>
> reset_control_rearm() keeps use of triggered_count sane in the reset
> framework. Therefore, use of reset_control_reset() on shared reset line
> should be balanced with reset_control_rearm().
>
> Signed-off-by: Amjad Ouled-Ameur <aouledameur@...libre.com>
> Reported-by: Jerome Brunet <jbrunet@...libre.com>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@...glemail.com>