tree 0487db594de37d6fcc0794d919627a89dd45b034
parent 05dbcb430795b2e1fb1d5c757f8619d3dbed0a1c
author Gabriel Somlo <somlo@cmu.edu> 1457461850 -0500
committer Michael S. Tsirkin <mst@redhat.com> 1460031400 +0300

firmware: qemu_fw_cfg.c: hold ACPI global lock during device access

Allowing for the future possibility of implementing AML-based
(i.e., firmware-triggered) access to the QEMU fw_cfg device,
acquire the global ACPI lock when accessing the device on behalf
of the guest-side sysfs driver, to prevent any potential race
conditions.

Suggested-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Gabriel Somlo <somlo@cmu.edu>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>