[PATCH 1/2] drm/amdgpu/gfx10: Avoid uninitialised variable 'index'

[Mike Lothian]

This stops clang complaining:

drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c:3846:6: warning: variable 'index' is 
used uninitialized whenever 'if' condition is true [-Wsometimes-uninitialized]
        if (ring->is_mes_queue) {
            ^~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c:3903:30: note: uninitialized use occurs 
here
        amdgpu_device_wb_free(adev, index);
                                    ^~~~~
drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c:3846:2: note: remove the 'if' if its 
condition is always false
        if (ring->is_mes_queue) {
        ^~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c:3839:16: note: initialize the variable 
'index' to silence this warning
        unsigned index;
                      ^
                       = 0

Signed-off-by: Mike Lothian <m...@fireburn.co.uk>
---
 drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c 
b/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
index fc289ee54a47..043f8bc37f21 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
@@ -3900,7 +3900,8 @@ static int gfx_v10_0_ring_test_ib(struct amdgpu_ring 
*ring, long timeout)
                amdgpu_ib_free(adev, &ib, NULL);
        dma_fence_put(f);
 err1:
-       amdgpu_device_wb_free(adev, index);
+       if (!ring->is_mes_queue)
+               amdgpu_device_wb_free(adev, index);
        return r;
 }
 
-- 
2.35.1