linux-kernel - Re: [PATCH v3 1/3] staging: r8188eu: remove _io

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Date:   Mon, 6 Sep 2021 17:01:09 +0300
From:   Pavel Skripkin <paskripkin@...il.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Fabio M. De Francesco" <fmdefrancesco@...il.com>
Cc:     Larry Finger <Larry.Finger@...inger.net>,
        Phillip Potter <phil@...lpotter.co.uk>,
        linux-staging@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 1/3] staging: r8188eu: remove _io_ops structure

On 9/6/21 4:56 PM, Greg Kroah-Hartman wrote:
> On Sun, Sep 05, 2021 at 12:00:46AM +0200, Fabio M. De Francesco wrote:
>> -void _rtw_read_mem(struct adapter *adapter, u32 addr, u32 cnt, u8 *pmem)
>> -{
>> -	void (*_read_mem)(struct intf_hdl *pintfhdl, u32 addr, u32 cnt, u8 *pmem);
>> -	struct io_priv *pio_priv = &adapter->iopriv;
>> -	struct	intf_hdl		*pintfhdl = &pio_priv->intf;
>> -
>> -
>> -	if (adapter->bDriverStopped || adapter->bSurpriseRemoved)
>> -	     return;
>> -	_read_mem = pintfhdl->io_ops._read_mem;
>> -	_read_mem(pintfhdl, addr, cnt, pmem);
>> -
>> -}
> 
> This is odd, in that it resolves down to usb_read_mem which does
> nothing at all.
> 
> And then no one calls this at all either?
> 

Yep, there is no caller of this function... Idk why this was added :)

> How about removing the io ops that are not used at all first, one at a
> time, making it obvious what is happening, and then convert the ones
> that are used one at a time, and when all is done, then removing the
> structure?
> 

Ok, sounds like a good idea. Will fix in v4, thank you

> That makes it obvious what is happening and much much easier to review
> for correctness.
> 

Agree


With regards,
Pavel Skripkin