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-rw-r--r--drivers/char/drm/radeon_state.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/char/drm/radeon_state.c b/drivers/char/drm/radeon_state.c
index 99589fe0032f..0433ff80cb70 100644
--- a/drivers/char/drm/radeon_state.c
+++ b/drivers/char/drm/radeon_state.c
@@ -2987,7 +2987,11 @@ static int radeon_cp_getparam(DRM_IOCTL_ARGS)
case RADEON_PARAM_GART_TEX_HANDLE:
value = dev_priv->gart_textures_offset;
break;
-
+ case RADEON_PARAM_SCRATCH_OFFSET:
+ if (!dev_priv->writeback_works)
+ return DRM_ERR(EINVAL);
+ value = RADEON_SCRATCH_REG_OFFSET;
+ break;
case RADEON_PARAM_CARD_TYPE:
if (dev_priv->flags & CHIP_IS_PCIE)
value = RADEON_CARD_PCIE;