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drm/i915/opregion: use BUILD_BUG_ON to verify mailbox struct sizes 

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Jani Nikula 2015-07-02 17:43:21 +03:00 committed by Daniel Vetter
parent 856974a401
commit 2d80391d36
1 changed files with 5 additions and 0 deletions
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5
drivers/gpu/drm/i915/intel_opregion.c
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@ -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) {