CVS commit: src/sys/dev/pci

["Jason R Thorpe" <thorpej%netbsd.org@localhost>]

Module Name:    src
Committed By:   thorpej
Date:           Tue Dec 24 06:27:17 UTC 2019

Modified Files:
        src/sys/dev/pci: ichsmb.c piixpm.c

Log Message:
Make ichsmb and piixpm MP-safe:
- Synchronize with the interrupt handler using a mutex.
- Use a condvar to wait for completion, rather than tsleep().
- Mark our interrupt handler as such.

Also, other general correctness fixes:
- Loop around testing the completion condition to protect aginst
  spurious wakes.
- The "i2c exec" function returns an error code, so actually do so.


To generate a diff of this commit:
cvs rdiff -u -r1.64 -r1.65 src/sys/dev/pci/ichsmb.c
cvs rdiff -u -r1.59 -r1.60 src/sys/dev/pci/piixpm.c

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