netdev - RE: [PATCH net-next v2 1/2] r8152: adjust generic_ocp

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Date: Wed, 26 Jul 2023 09:50:01 +0000
From: Hayes Wang <hayeswang@...ltek.com>
To: Andrew Lunn <andrew@...n.ch>
CC: "kuba@...nel.org" <kuba@...nel.org>,
        "davem@...emloft.net"
	<davem@...emloft.net>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        nic_swsd <nic_swsd@...ltek.com>,
        "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>,
        "linux-usb@...r.kernel.org"
	<linux-usb@...r.kernel.org>
Subject: RE: [PATCH net-next v2 1/2] r8152: adjust generic_ocp_write function

Andrew Lunn <andrew@...n.ch>
> Sent: Wednesday, July 26, 2023 4:37 PM
[...]
> How often is byte_en 0xff? Do you have some benchmark numbers to show
> it is worth the complexity?

It is usually used for writing firmware.
The firmware contains several blocks of continuous registers.

I think it is worth, even this only saves several numbers of control transfer.
This patch could replace 3 control transfers with 1 control transfer.
If you could do it with one step, why do you use 3 steps?
Besides, a control transfer is a complex process.
I think this could reduce the loading of both software and hardware.

Best Regards,
Hayes