[PATCH] drm/radeon: add error output if VM CS fails on cayman

[alexdeucher at gmail.com]

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

So we know why the CS was rejected.

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

diff --git a/drivers/gpu/drm/radeon/evergreen_cs.c b/drivers/gpu/drm/radeon/evergreen_cs.c
index 573ed1b..30271b64 100644
--- a/drivers/gpu/drm/radeon/evergreen_cs.c
+++ b/drivers/gpu/drm/radeon/evergreen_cs.c
@@ -2829,6 +2829,7 @@ static bool evergreen_vm_reg_valid(u32 reg)
 	case CAYMAN_SQ_EX_ALLOC_TABLE_SLOTS:
 		return true;
 	default:
+		DRM_ERROR("Invalid register 0x%x in CS\n", reg);
 		return false;
 	}
 }
-- 
1.7.7.5