drm/radeon/cik: Return backend map information to userspace

This is required to properly calculate the tiling parameters
in userspace.

Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/radeon/radeon_kms.c b/drivers/gpu/drm/radeon/radeon_kms.c
index bb87105..fa42c81 100644 (file)
--- a/drivers/gpu/drm/radeon/radeon_kms.c
+++ b/drivers/gpu/drm/radeon/radeon_kms.c
@@ -340,7 +340,7 @@ int radeon_info_ioctl(struct drm_device *dev, void *data, struct drm_file *filp)
                break;
        case RADEON_INFO_BACKEND_MAP:
                if (rdev->family >= CHIP_BONAIRE)
-                       return -EINVAL;
+                       *value = rdev->config.cik.backend_map;
                else if (rdev->family >= CHIP_TAHITI)
                        *value = rdev->config.si.backend_map;
                else if (rdev->family >= CHIP_CAYMAN)