drm/radeon: fix regression on atom cards with hardcoded EDID record.
Dave Airlie [Sun, 1 May 2011 10:16:30 +0000 (20:16 +1000)]
Since fafcf94e2b5732d1e13b440291c53115d2b172e9 introduced an edid size, it seems to have broken this path.

This manifest as oops on T500 Lenovo laptops with dual graphics primarily.

Fixes: https://bugzilla.kernel.org/show_bug.cgi?id=33812

cc: stable@kernel.org
Reviewed-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

drivers/gpu/drm/radeon/radeon_atombios.c

index f5d12fb..f116516 100644 (file)
@@ -1599,9 +1599,10 @@ struct radeon_encoder_atom_dig *radeon_atombios_get_lvds_info(struct
                                                        memcpy((u8 *)edid, (u8 *)&fake_edid_record->ucFakeEDIDString[0],
                                                               fake_edid_record->ucFakeEDIDLength);
 
-                                                       if (drm_edid_is_valid(edid))
+                                                       if (drm_edid_is_valid(edid)) {
                                                                rdev->mode_info.bios_hardcoded_edid = edid;
-                                                       else
+                                                               rdev->mode_info.bios_hardcoded_edid_size = edid_size;
+                                                       } else
                                                                kfree(edid);
                                                }
                                        }