From 2d80391d36e698e8dabc3b3ff0969fc6fde156c4 Mon Sep 17 00:00:00 2001 From: Jani Nikula Date: Thu, 2 Jul 2015 17:43:21 +0300 Subject: [PATCH] drm/i915/opregion: use BUILD_BUG_ON to verify mailbox struct sizes Signed-off-by: Jani Nikula Reviewed-by: Chris Wilson Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_opregion.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_opregion.c b/drivers/gpu/drm/i915/intel_opregion.c index 71e87abdcae7..c4756a2d77bb 100644 --- a/drivers/gpu/drm/i915/intel_opregion.c +++ b/drivers/gpu/drm/i915/intel_opregion.c @@ -862,6 +862,11 @@ int intel_opregion_setup(struct drm_device *dev) char buf[sizeof(OPREGION_SIGNATURE)]; int err = 0; + BUILD_BUG_ON(sizeof(struct opregion_header) != 0x100); + BUILD_BUG_ON(sizeof(struct opregion_acpi) != 0x100); + BUILD_BUG_ON(sizeof(struct opregion_swsci) != 0x100); + BUILD_BUG_ON(sizeof(struct opregion_asle) != 0x100); + pci_read_config_dword(dev->pdev, PCI_ASLS, &asls); DRM_DEBUG_DRIVER("graphic opregion physical addr: 0x%x\n", asls); if (asls == 0) { -- 2.39.5