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Subject: Re: [PATCH net-next v4 5/6] net: ravb: Do not apply features to
 hardware if the interface is down
To: Claudiu <claudiu.beznea@tuxon.dev>, <davem@davemloft.net>,
	<edumazet@google.com>, <kuba@kernel.org>, <pabeni@redhat.com>,
	<biju.das.jz@bp.renesas.com>
CC: <netdev@vger.kernel.org>, <linux-renesas-soc@vger.kernel.org>,
	<linux-kernel@vger.kernel.org>, Claudiu Beznea
	<claudiu.beznea.uj@bp.renesas.com>
References: <20240214135800.2674435-1-claudiu.beznea.uj@bp.renesas.com>
 <20240214135800.2674435-6-claudiu.beznea.uj@bp.renesas.com>
From: Sergey Shtylyov <s.shtylyov@omp.ru>
Organization: Open Mobile Platform
Message-ID: <02f45526-0d56-469c-db3d-de1ef8785685@omp.ru>
Date: Wed, 14 Feb 2024 20:07:20 +0300
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On 2/14/24 4:57 PM, Claudiu wrote:

> From: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
> 
> Do not apply features to hardware if the interface is down. In case runtime
> PM is enabled, and while the interface is down, the IP will be in reset
> mode (as for some platforms disabling the clocks will switch the IP to
> reset mode, which will lead to losing register contents) and applying
> settings in reset mode is not an option. Instead, cache the features and
> apply them in ravb_open() through ravb_emac_init().
> 
> To avoid accessing the hardware while the interface is down
> pm_runtime_active() check was introduced. Along with it the device runtime
> PM usage counter has been incremented to avoid disabling the device clocks
> while the check is in progress (if any).
> 
> Commit prepares for the addition of runtime PM.
> 
> Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>

Reviewed-by: Sergey Shtylyov <s.shtylyov@omp.ru>

[...]

MBR, Sergey