What's up with the Embedded Controller driver? [was Re: patched sms-cm acpi/ec.c to 2.6.11.5]

[Rich Townsend <rhdt-OBnUx95tOyn10jlvfTC4gA@public.gmane.org>]

François Valenduc wrote:
> Pedro Venda a écrit :
> 
> 
>>On Wednesday 23 March 2005 17:29, Rich Townsend wrote:
>> 
>>
>>
>>>Hi Pedro --
>>>
>>>Sorry I didn't respond sooner; I've been very busy with my job. I'll
>>>check through this when I get a chance, and roll it into my sbs-cm stuff
>>>if it looks OK.
>>>   
>>>
>>
>>hello rich,
>>
>>take your time. we're all doing what we can.
>>
>>it does NOT seem ok. after some more tests with the patch, I found out that 
>>francois was right about most of the problems:
>>* timeout on boot, just after the boot loader. this is very confusing to me...
>>* when I plug in the battery, it takes ages to show information about it... 
>>more than 1 minute.
>>* about the usb problems, apparently I wasn't affected.
>>
>>could you please tip us about what could be causing these delays? especially 
>>the boot delay... it really puzzles my mind.
>>
>>regards,
>>pedro venda.
>> 
>>
> 
> Concerning USB problems, I think it happens because I tried the patch 
> with the 2.6.11 kernel. I have retried with the 2.6.11.5 and there are 
> no more USB problems. But all the other problems remains. Concerning the 
> timeout on boot, could it be caused by the acpi-dsdt-initrd patch made 
> by Markus Gaugausch. Maybe we should try other ways to incorporate the 
> DSDT to the kernel.
> François Valenduc

I doubt it is the DSDT patch; rather, it looks like something has gone 
wrong in the embedded controller driver in going from 2.6.10 to 2.6.11. 
  I've tried out a number of different ways of fixing ec event handling, 
including my own spinlock kludge and Pedro's version of it, and also a 
series of patches by Dmitry Torokhov; but all of them seem to have 
problems with very sluggish EC response and/or EC timeouts (indicated by 
"Handler for [EmbeddedControl] returned AE_TIME").

Who currently maintains ec.c? And what exactly has been done to it since 
2.6.10?

cheers,

Rich


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