From cbcacd6138f1624aa546cae1357e0f3e414d64c2 Mon Sep 17 00:00:00 2001
From: Mike Lothian <mike@fireburn.co.uk>
Date: Wed, 4 May 2022 23:24:13 +0100
Subject: drm/amdgpu/gfx10: Avoid uninitialised variable 'index'
Git-commit: 8fab8e2ecc7df1cb42c80af40e7b6069debef451
Patch-mainline: v5.19-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225
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 <mike@fireburn.co.uk>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
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;
}
--
2.38.1