linux-kernel - Re: [PATCH v3 1/3] phy: amlogic: phy-meson-gxl-usb2: fix shared reset controller use

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Message-ID: <CAFBinCA4UHybSkKX=yRvEE3k7oSwFEzYADkZdsMxfMsp-Cmodg@mail.gmail.com>
Date:   Sun, 21 Nov 2021 00:39:57 +0100
From:   Martin Blumenstingl <martin.blumenstingl@...glemail.com>
To:     Amjad Ouled-Ameur <aouledameur@...libre.com>
Cc:     khilman@...libre.com, p.zabel@...gutronix.de, balbi@...nel.org,
        jbrunet@...libre.com, linux-amlogic@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org
Subject: Re: [PATCH v3 1/3] phy: amlogic: phy-meson-gxl-usb2: fix shared reset
 controller use

On Fri, Nov 12, 2021 at 5:33 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>