Re: hda on Via Epia-ML motherboard seen on 2.6.18, but not 2.6.19

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On 12/28/06, Adam J. Richter <adam@xxxxxxxxxxxxx> wrote:
On Tue, 26 Dec 2006 06:36:45 +0800, Adam Richter wrote:
>On Fri, 22 Dec 2006 14:56:20 +0100, Bartlomiej Zolnierkiewicz wrote:
>>On 12/22/06, Adam J. Richter <adam@xxxxxxxxxxxxx> wrote:
>>>         I have a 666MHz Via Epia-ML motherboard (using a Via Eden, I
>>> think).  I am booting it from a CompactFlash card attached by an
>>> IDE-CF adapter.  Everything works fine under 2.6.18.  Under 2.6.19,
>>> 2.6.19.1 and 2.6.20-rc1, the master device on ide0 is not seen.
>[...]

>>>From the quick look the only IDE subsystem change in 2.6.19
>>which could be responsible (wild guess) for this is the commit:
>>17c1033d331a430ce631805e15215e63b4cce764
>>[ patch attached in case you don't have git tree at hand ]

>>Could you check if reverting it fixes the problem?
>>If not it seems that the best way to proceed is git bisect.

>I'll cc this message to linux-ide in case anyone else encounters the
>problem and wants to be informed about it.

>As mentioned in my previous off-list email, the reverting attached
>patch did not fix the problem.

>I now have a few more data points to narrow where the bug was introduced:

>2.6.18.4       ok
>2.6.18.6       ok
>2.6.19-rc1     fails

>I expect I will now work on setting up a git tree fed by kernel.org
>and using git bisect as you suggest.

>Thanks for your advice.  I'll let you know when I have more news.

Before pulling from the official git development tree, I tried the
linux-2.6.18-git[n] snapshots.  It looks the problem goes back as far
as 2.6.18-git1.  Here is a list of test results, for completeness.

2.6.18          ok
2.6.18.1        ok
2.6.18.4        ok
2.6.18.6        ok
2.6.18-git1     fails
2.6.18-git2     fails
2.6.18-git5     fails
2.6.18-git10    fails
2.6.19-rc1      fails
2.6.19          fails
2.6.20-rc1      fails
2.6.20-rc2      fails

Thanks for testing.

Now I guess will pull from the official git development tree and try using
git bisect to narrow the problem further.

Yes, 2.6.18-git1 patch is still near 3MB large, more-over

[bzolnier@trik adam]$ grep drivers/ide patch-2.6.18-git1
diff --git a/drivers/ide/ppc/pmac.c b/drivers/ide/ppc/pmac.c
--- a/drivers/ide/ppc/pmac.c
+++ b/drivers/ide/ppc/pmac.c

so it looks like some non-IDE commit is affecting IDE driver. :?

Bart
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