PATCH - updated EC driver

Nate Lawson nate at
Wed Jul 9 11:34:51 PDT 2003

On Wed, 9 Jul 2003, John Baldwin wrote:
> On 09-Jul-2003 Nate Lawson wrote:
> >
> Not as broken as the last patch, but still broken for me:
>     ACPI-0432: *** Error: Handler for [EmbeddedControl] returned AE_NO_HARDWARE_RESPONSE
>     ACPI-1287: *** Error: Method execution failed [\\_SB_.PCI0.PX41.SECN.BEXT] (Node 0xc3342260),
>     ACPI-1287: *** Error: Method execution failed [\\_SB_.PCI0.PX41.SECN.MAST._STA] (Node

Thanks for testing.

Try changing the 1000 in line 658 to 10000.  Your EC seems to take more
than 1 ms to respond.  The old behavior was 10 ms which I thought was too
long but apparently your system requires this.

BTW, what are the guidelines for DELAY vs. msleep?  I'm holding a mutex
for the local EC for up to 10 ms in that case, in increments of DELAY(10).
I would think that somewhere around 1 ms, the delay needs to become an
msleep so other device interrupts can occur (i.e. EcGpeHandler).  I'm
thinking about having the loop up to 1 ms be based on DELAY, and then 9
calls to msleep(..., 1) for the really slow devices.  Let me know what you
think is best.


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