CVS commit: [jmcneill-pm] src/sys/dev/acpi

[Joerg Sonnenberger <joerg%netbsd.org@localhost>]

Module Name:    src
Committed By:   joerg
Date:           Thu Oct  4 10:38:27 UTC 2007

Modified Files:
        src/sys/dev/acpi [jmcneill-pm]: acpi_ec.c

Log Message:
Random undocumented fact #741:
The ACPI Embedded Controller will generally only except new commands if
the input buffer is not full.

Push the command write into acpiec_gpe_state_machine and start the
processing with a few busy iterations in
acpiec_write/acpiec_read/acpiec_gpe_query. Also move the read of data
into the state machine to keep all register access in one place.

This fixes random read/write errors that occured with a chance of 10% or
so. It is unclear why the old code didn't hit it more often.


To generate a diff of this commit:
cvs rdiff -r1.41.6.6 -r1.41.6.7 src/sys/dev/acpi/acpi_ec.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.