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We need keep the device awake when performing any kind of mmio operation. Closes: https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/279 Signed-off-by: Matthew Auld <matthew.auld@intel.com> Cc: Rodrigo Vivi <rodrigo.vivi@intel.com> Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com> Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com> Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>