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>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_kms.c b/drivers/gpu/drm/radeon/radeon_kms.c
index bb8710531a1b..fa42c81da500 100644
--- 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)