drm/radeon/kms: check for valid PCI bios and not OF rom
stops us trying to treat a OF rom as a PCI rom.
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/radeon/radeon_bios.c b/drivers/gpu/drm/radeon/radeon_bios.c
index 9069217..26856ed 100644
--- a/drivers/gpu/drm/radeon/radeon_bios.c
+++ b/drivers/gpu/drm/radeon/radeon_bios.c
@@ -411,6 +411,12 @@
goto free_bios;
}
+ tmp = RBIOS16(0x18);
+ if (RBIOS8(tmp + 0x14) != 0x0) {
+ DRM_INFO("Not an x86 BIOS ROM, not using.\n");
+ goto free_bios;
+ }
+
rdev->bios_header_start = RBIOS16(0x48);
if (!rdev->bios_header_start) {
goto free_bios;