linux-kernel - Re: Reverting 5d423 fixes loading of ath9k on Acer Extensa 7630EZ

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Date:	Tue, 10 Nov 2009 12:50:21 -0800
From:	"Luis R. Rodriguez" <mcgrof@...il.com>
To:	Greg KH <greg@...ah.com>, Chris Wright <chrisw@...s-sol.org>,
	stable@...nel.org
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-kernel@...r.kernel.org,
	linux-wireless <linux-wireless@...r.kernel.org>,
	Yannick Roehlly <yannick.roehlly@...e.fr>,
	Yinghai Lu <yinghai@...nel.org>,
	Jesse Barnes <jesse.barnes@...el.com>,
	Ivan Kokshaysky <ink@...assic.park.msu.ru>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"John W. Linville" <linville@...driver.com>, berndl81@....at,
	Ingo Molnar <mingo@...e.hu>,
	Stefan Bader <stefan.bader@...onical.com>
Subject: Re: Reverting 5d423 fixes loading of ath9k on Acer Extensa 7630EZ

On Tue, Nov 10, 2009 at 12:30 PM, Luis R. Rodriguez <mcgrof@...il.com> wrote:
> On Mon, Nov 9, 2009 at 7:49 AM, Luis R. Rodriguez <mcgrof@...il.com> wrote:
>> On Sun, Nov 8, 2009 at 11:15 PM, Ingo Molnar <mingo@...e.hu> wrote:
>>>
>>> * Luis R. Rodriguez <mcgrof@...il.com> wrote:
>>>
>>>> On Wed, Nov 4, 2009 at 11:14 PM, Ingo Molnar <mingo@...e.hu> wrote:
>>>> >
>>>> > * Linus Torvalds <torvalds@...ux-foundation.org> wrote:
>>>> >
>>>> >> On Wed, 4 Nov 2009, Luis R. Rodriguez wrote:
>>>> >> >
>>>> >> > Can you please consider reviewing this issue and help determine if
>>>> >> > this indeed needs to be reverted for 2.6.32 and the next 2.6.31.y.
>>>> >> >
>>>> >> > I am curious if other devices would work by reverting this as well.
>>>> >> > [ ... ] For details please feel free to check:
>>>> >> >
>>>> >> > http://bugzilla.kernel.org/show_bug.cgi?id=14402
>>>> >>
>>>> >> That same commit was the cause for
>>>> >>
>>>> >> ?? ?? ?? http://bugzilla.kernel.org/show_bug.cgi?id=13940
>>>> >>
>>>> >> and we just increased the rounding to make it go away (see commit
>>>> >> 15b812f1). But that was a hack.
>>>> >>
>>>> >> And if that didn't help the ath9k case, then we should just revert
>>>> >> entirely.
>>>> >
>>>> > Agreed - below is the combo 15b812f1 + 5d423ccd revert. (Would be nice
>>>> > to get the boot log of the latest post-15b812f1 kernel that Yinghai
>>>> > asked for before we revert, in the hope of better understanding the
>>>> > problem.)
>>>>
>>>> Bernhard has confirmed the new patch fixes this issue.
>>>
>>> Good - so latest kernels should be fine (on Bernhard's box) and no
>>> change is needed, right?
>>
>> Yea, but it does mean we need a fix propagated down to older kernels.
>
> Greg, please consider applying 15b812f1d0 to stable 2.6.31 as it fixes
> an issue introduced on 2.6.31 and only fixed now for 2.6.32. This
> should fix an issue when loading either sky2 or ath9k on some specific
> platforms.
>
> The details for the ath9k debugging are available on this bug:
>
> http://bugzilla.kernel.org/show_bug.cgi?id=14402

Just noticed this did make it to 2.6.31.6, sorry for the noise and thanks.

  Luis
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