From b20a7af87e8bf4dfc26fe16f2e51872754286d1d Mon Sep 17 00:00:00 2001
From: Tom Rix <trix@redhat.com>
Date: Mon, 14 Feb 2022 10:22:24 -0800
Subject: drm/amdgpu: check return status before using stable_pstate
Git-commit: eed1a5c74216907f79f7b1af725e570e95bab0ea
Patch-mainline: v5.18-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
Clang static analysis reports this problem
amdgpu_ctx.c:616:26: warning: Assigned value is garbage
or undefined
args->out.pstate.flags = stable_pstate;
^ ~~~~~~~~~~~~~
amdgpu_ctx_stable_pstate can fail without setting
stable_pstate. So check.
Fixes: 8cda7a4f96e4 ("drm/amdgpu/UAPI: add new CTX OP to get/set stable pstates")
Signed-off-by: Tom Rix <trix@redhat.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
index 1c72f6095f08..f522b52725e4 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
@@ -613,7 +613,8 @@ int amdgpu_ctx_ioctl(struct drm_device *dev, void *data,
if (args->in.flags)
return -EINVAL;
r = amdgpu_ctx_stable_pstate(adev, fpriv, id, false, &stable_pstate);
- args->out.pstate.flags = stable_pstate;
+ if (!r)
+ args->out.pstate.flags = stable_pstate;
break;
case AMDGPU_CTX_OP_SET_STABLE_PSTATE:
if (args->in.flags & ~AMDGPU_CTX_STABLE_PSTATE_FLAGS_MASK)
--
2.38.1