From: Dave Airlie <airlied@redhat.com>
Date: Thu, 11 Feb 2010 05:38:23 +0000 (+1000)
Subject: drm/radeon/kms: check for valid PCI bios and not OF rom
X-Git-Tag: MMI-PSA29.97-13-9~23984^2~100^2~32
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=e34398952e056bbd99f9099fae77be26e5c6aa78;p=GitHub%2FMotorolaMobilityLLC%2Fkernel-slsi.git

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 906921740c60..26856ed8d972 100644
--- a/drivers/gpu/drm/radeon/radeon_bios.c
+++ b/drivers/gpu/drm/radeon/radeon_bios.c
@@ -411,6 +411,12 @@ bool radeon_get_bios(struct radeon_device *rdev)
 		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;