netdev - Re: [PATCH net-next v4 1/4] rust: core abstractions for network PHY drivers

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Date: Tue, 17 Oct 2023 20:32:38 +0900 (JST)
From: FUJITA Tomonori <fujita.tomonori@...il.com>
To: benno.lossin@...ton.me
Cc: fujita.tomonori@...il.com, netdev@...r.kernel.org,
 rust-for-linux@...r.kernel.org, andrew@...n.ch,
 miguel.ojeda.sandonis@...il.com, tmgross@...ch.edu, boqun.feng@...il.com,
 wedsonaf@...il.com, greg@...ah.com
Subject: Re: [PATCH net-next v4 1/4] rust: core abstractions for network
 PHY drivers

On Tue, 17 Oct 2023 07:41:38 +0000
Benno Lossin <benno.lossin@...ton.me> wrote:

>>>> read() is reading from hardware register. write() is writing a value
>>>> to hardware register. Both updates the object that phy_device points
>>>> to?
>>>
>>> Indeed, I was just going with the standard way of suggesting `&self`
>>> for reads, there are of course exceptions where `&mut self` would make
>>> sense. That being said in this case both options are sound, since
>>> the C side locks a mutex.
>> 
>> I see. I use &mut self for both read() and write().
> 
> I would recommend documenting this somewhere (why `read` is `&mut`), since
> that is a bit unusual (why restrict something more than necessary?).

I added such at the top of the file.