linux-kernel - Re: [PATCH net-next v3 4/6] net: ravb: Move the update of ndev->features to ravb_set

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Date: Tue, 13 Feb 2024 22:58:52 +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>,
	<biju.das.jz@...renesas.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 v3 4/6] net: ravb: Move the update of
 ndev->features to ravb_set_features()

On 2/13/24 10:36 PM, Sergey Shtylyov wrote:
[...]

>> From: Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
>>
>> Commit c2da9408579d ("ravb: Add Rx checksum offload support for GbEth")
>> introduced support for setting GbEth features. With this the IP-specific
>> features update functions update the ndev->features individually.
>>
>> Next commits add runtime PM support for the ravb driver. The runtime PM
>> implementation will enable/disable the IP clocks on
>> the ravb_open()/ravb_close() functions. Accessing the IP registers with
>> clocks disabled blocks the system.
>>
>> The ravb_set_features() function could be executed when the Ethernet
>> interface is closed so we need to ensure we don't access IP registers while
>> the interface is down when runtime PM support will be in place.
>>
>> For these, move the update of ndev->features to ravb_set_features() and
>> make the IP-specific features set function return int. In this way we
>> update the ndev->features only when the IP-specific features set function
>> returns success and we can avoid code duplication when introducing
>> runtime PM registers protection.
>>
>> Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
> 
> Reviewed-by: Sergey Shtylyov <s.shtylyov@....ru>

   Have to withdraw this... :-/

[...]

MBR, Sergey