i2c: piix4: Request the SMBUS semaphore inside the mutex

SMBSLVCNT must be protected with the piix4_mutex_sb800 in order to avoid
multiple buses accessing to the semaphore at the same time.

Fixes: 701dc207bf55 ("i2c: piix4: Avoid race conditions with IMC")
Reported-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

path: root/tools/testing/selftests/ftrace/test.d/00basic/basic3.tc

#!/bin/sh
# description: Basic trace clock test
test -f trace_clock
for c in `cat trace_clock | tr  -d \[\]`; do
  echo $c > trace_clock
  grep '\['$c'\]' trace_clock
done
echo local > trace_clock