2010-12-10 19:11:47

by ikorot

[permalink] [raw]
Subject: Re: [PATCH 1/4] b43: N-PHY: update init tables

Rafal,


-----Original Message-----
>From: Rafał Miłecki <[email protected]>
>Sent: Dec 9, 2010 10:36 PM
>To: [email protected]
>Cc: Larry Finger <[email protected]>, Hauke Mehrtens <[email protected]>, [email protected], [email protected]
>Subject: Re: [PATCH 1/4] b43: N-PHY: update init tables
>
>W dniu 10 grudnia 2010 03:26 użytkownik <[email protected]> napisał:
>> -----Original Message-----
>>>From: Rafał Miłecki <[email protected]>
>>>Sent: Dec 9, 2010 6:06 AM
>>>To: [email protected]
>>>Cc: Larry Finger <[email protected]>, Hauke Mehrtens <[email protected]>, [email protected], [email protected]
>>>Subject: Re: [PATCH 1/4] b43: N-PHY: update init tables
>>>
>>>2010/12/8  <[email protected]>:
>>>> Larry,
>>>>
>>>>
>>>> -----Original Message-----
>>>>>From: Larry Finger <[email protected]>
>>>>>Sent: Dec 7, 2010 12:00 PM
>>>>>To: [email protected]
>>>>>Cc: Hauke Mehrtens <[email protected]>, [email protected], [email protected]
>>>>>Subject: Re: [PATCH 1/4] b43: N-PHY: update init tables
>>>>>
>>>>>On 12/07/2010 01:49 PM, [email protected] wrote:
>>>>>>> One reason is that these tables changed from non-zero to zero values between
>>>>>>> Broadcom driver 4.174.64.19 and 5.10.56.46. As they might change again, I think
>>>>>>> we should retain the full version.
>>>>>>
>>>>>> Is there a way to check for version of the driver?
>>>>>> This way whoever uses old one won't be screwed...
>>>>>
>>>>>That will not be a problem as no older version of b43 works at all with b43. To
>>>>>help you understand this change, when the 4.174.64.19 Broadcom driver was
>>>>>reverse-engineered, the tables had non-zero values. Rafel later compared the
>>>>>trace dumps of b43 with the latest version of wl and found that the values are
>>>>>now zero. When I rechecked driver 5.10.56.46, I found them to be zero there as
>>>>>well and changed the specs.
>>>>
>>>> Well, it maybe feasible to keep the old values and check
>>>> the version of the driver, since you are saying yourself
>>>> that the value might be changing in the future.
>>>> Maybe for couple of releases only?
>>>
>>>Sorry, but I don't understand that at all. What do you mean by version
>>>of the driver? What driver?
>>
>> #if B43_VERSION <= x.x.x.x
>> // table initialized to some values
>> #else
>> //table initialized to 0's
>> #endif
>
>You want to put condition checking b43 version in... b43 driver? I
>can't follow you.

Yes.
And what you can't follow?

For historical purposes and to better understand the changes and ease the
debugging I proposed this addition.
Besides if for some reason in future versions Broadcom will decide to return to
the same values for init tables, the changes will be very simple.

Thank you.

>
>--
>Rafał



2010-12-10 19:33:54

by Rafał Miłecki

[permalink] [raw]
Subject: Re: [PATCH 1/4] b43: N-PHY: update init tables

W dniu 10 grudnia 2010 20:09 użytkownik <[email protected]> napisał:
> Rafal,
>
>
> -----Original Message-----
>>From: Rafał Miłecki <[email protected]>
>>Sent: Dec 9, 2010 10:36 PM
>>To: [email protected]
>>Cc: Larry Finger <[email protected]>, Hauke Mehrtens <[email protected]>, [email protected], [email protected]
>>Subject: Re: [PATCH 1/4] b43: N-PHY: update init tables
>>
>>W dniu 10 grudnia 2010 03:26 użytkownik  <[email protected]> napisał:
>>> -----Original Message-----
>>>>From: Rafał Miłecki <[email protected]>
>>>>Sent: Dec 9, 2010 6:06 AM
>>>>To: [email protected]
>>>>Cc: Larry Finger <[email protected]>, Hauke Mehrtens <[email protected]>, [email protected], [email protected]
>>>>Subject: Re: [PATCH 1/4] b43: N-PHY: update init tables
>>>>
>>>>2010/12/8  <[email protected]>:
>>>>> Larry,
>>>>>
>>>>>
>>>>> -----Original Message-----
>>>>>>From: Larry Finger <[email protected]>
>>>>>>Sent: Dec 7, 2010 12:00 PM
>>>>>>To: [email protected]
>>>>>>Cc: Hauke Mehrtens <[email protected]>, [email protected], [email protected]
>>>>>>Subject: Re: [PATCH 1/4] b43: N-PHY: update init tables
>>>>>>
>>>>>>On 12/07/2010 01:49 PM, [email protected] wrote:
>>>>>>>> One reason is that these tables changed from non-zero to zero values between
>>>>>>>> Broadcom driver 4.174.64.19 and 5.10.56.46. As they might change again, I think
>>>>>>>> we should retain the full version.
>>>>>>>
>>>>>>> Is there a way to check for version of the driver?
>>>>>>> This way whoever uses old one won't be screwed...
>>>>>>
>>>>>>That will not be a problem as no older version of b43 works at all with b43. To
>>>>>>help you understand this change, when the 4.174.64.19 Broadcom driver was
>>>>>>reverse-engineered, the tables had non-zero values. Rafel later compared the
>>>>>>trace dumps of b43 with the latest version of wl and found that the values are
>>>>>>now zero. When I rechecked driver 5.10.56.46, I found them to be zero there as
>>>>>>well and changed the specs.
>>>>>
>>>>> Well, it maybe feasible to keep the old values and check
>>>>> the version of the driver, since you are saying yourself
>>>>> that the value might be changing in the future.
>>>>> Maybe for couple of releases only?
>>>>
>>>>Sorry, but I don't understand that at all. What do you mean by version
>>>>of the driver? What driver?
>>>
>>> #if B43_VERSION <= x.x.x.x
>>> // table initialized to some values
>>> #else
>>> //table initialized to 0's
>>> #endif
>>
>>You want to put condition checking b43 version in... b43 driver? I
>>can't follow you.
>
> Yes.
> And what you can't follow?
>
> For historical purposes and to better understand the changes and ease the
> debugging I proposed this addition.
> Besides if for some reason in future versions Broadcom will decide to return to
> the same values for init tables, the changes will be very simple.

So I guess you meant using "#if 0" for commenting old values?

I guess we could do that instead deleting old values, but fortunately
it's git so we always can browse history and restore old values
without problems :)

--
Rafał