linux-kernel - Re: [rt2x00-users] [PATCH] wireless: Remove unnessary write over of register 11 in rt2800lib.c

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Message-ID: <CAOJe8K1nkeVjNpNoUBxuJv-YXj3Wr_oH86yR31U7w3Jq5j7oxw@mail.gmail.com>
Date:	Sun, 28 Sep 2014 12:05:30 +0400
From:	Denis Kirjanov <kda@...ux-powerpc.org>
To:	Stanislaw Gruszka <sgruszka@...hat.com>
Cc:	Nicholas Krause <yocto6@...il.com>, IvDoorn@...il.com,
	netdev@...r.kernel.org, linux-wireless@...r.kernel.org,
	users@...x00.serialmonkey.com, linux-kernel@...r.kernel.org
Subject: Re: [rt2x00-users] [PATCH] wireless: Remove unnessary write over of
 register 11 in rt2800lib.c

Or someone with the hardware has to test and check that...

On 9/28/14, Stanislaw Gruszka <sgruszka@...hat.com> wrote:
> On Sat, Sep 27, 2014 at 05:11:41PM -0400, Nicholas Krause wrote:
>> This removes the unnecessary  overwrite of register 11 in the function,
>> rt2800_config_channel as we are already writing a correct value to the
>> register with rt2800_rfcsr_write(rt2x00dev,11.rfcsr).
> What make you sure that overwrite is unnecessary ?
>
>>
>> Signed-off-by: Nicholas Krause <yocto6@...il.com>
>> ---
>>  drivers/net/wireless/rt2x00/rt2800lib.c | 2 --
>>  1 file changed, 2 deletions(-)
>>
>> diff --git a/drivers/net/wireless/rt2x00/rt2800lib.c
>> b/drivers/net/wireless/rt2x00/rt2800lib.c
>> index 893c9d5..fb0ae38 100644
>> --- a/drivers/net/wireless/rt2x00/rt2800lib.c
>> +++ b/drivers/net/wireless/rt2x00/rt2800lib.c
>> @@ -2787,8 +2787,6 @@ static void rt2800_config_channel_rf55xx(struct
>> rt2x00_dev *rt2x00dev,
>>
>>  	if (rf->channel <= 14) {
>>  		rt2800_rfcsr_write(rt2x00dev, 10, 0x90);
>> -		/* FIXME: RF11 owerwrite ? */
>> -		rt2800_rfcsr_write(rt2x00dev, 11, 0x4A);
> We need a prove that remove is correct, i.e. some reference to
> vendor code or spec that current writing register twice with
> different values is wrong.
>
> NACK for the patch.
>
> Stanislaw
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