[PATCH 22/48] drm/radeon/kms: Only VM CS ioctl is supported on SI (v2)

[alexdeucher at gmail.com]

From: Alex Deucher <alexander.deucher at amd.com>

v2: avoid double free.

Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
 drivers/gpu/drm/radeon/radeon_cs.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/drivers/gpu/drm/radeon/radeon_cs.c b/drivers/gpu/drm/radeon/radeon_cs.c
index 087bd50..5e459a3 100644
--- a/drivers/gpu/drm/radeon/radeon_cs.c
+++ b/drivers/gpu/drm/radeon/radeon_cs.c
@@ -253,6 +253,13 @@ int radeon_cs_parser_init(struct radeon_cs_parser *p, void *data)
 		return -EINVAL;
 	}
 
+	/* we only support VM on SI+ */
+	if ((p->rdev->family >= CHIP_TAHITI) &&
+	    ((p->cs_flags & RADEON_CS_USE_VM) == 0)) {
+		DRM_ERROR("VM required on SI+!\n");
+		return -EINVAL;
+	}
+
 	if (radeon_cs_get_ring(p, ring, priority))
 		return -EINVAL;
 
-- 
1.7.7.5