linux-kernel - Re: [PATCH net-next 4/5] net: ravb: Do not apply RX checksum settings to hardware if the interface is down

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Message-ID: <82a95cae-29bc-06c1-0fab-5fa6302b4654@omp.ru>
Date: Wed, 7 Feb 2024 23:50:16 +0300
From: Sergey Shtylyov <s.shtylyov@....ru>
To: Claudiu <claudiu.beznea@...on.dev>, <davem@...emloft.net>,
	<edumazet@...gle.com>, <kuba@...nel.org>, <pabeni@...hat.com>
CC: <netdev@...r.kernel.org>, <linux-renesas-soc@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, Claudiu Beznea
	<claudiu.beznea.uj@...renesas.com>
Subject: Re: [PATCH net-next 4/5] net: ravb: Do not apply RX checksum settings
 to hardware if the interface is down

On 2/7/24 3:07 PM, Claudiu wrote:

> From: Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
> 
> Do not apply the RX checksum settings 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 registers content) and

   The register contents? I thought I'd pointed out all of these...

> applying settings in reset mode is not an option. Instead, cache the RX
> checksum settings and apply them in ravb_open() through ravb_emac_init().
> This has been solved by introducing pm_runtime_active() check. 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@...renesas.com>

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

   I'm afraid such check now needs to be added to ravb_set_features_gbeth()
that's populated by Biju Das' checksum patches (which I've already ACKed)...

[...]

MBR, Sergey