On 2022-09-28 10:49, sunpeng...@amd.com wrote:
From: Leo Li <sunpeng...@amd.com>
On ChromeOS clang build, the following warning is seen:
/mnt/host/source/src/third_party/kernel/v5.15/drivers/gpu/drm/amd/amdgpu/umc_v6_7.c:463:6:
error: variable 'mc_umc_status' is used uninitialized whenever 'if' condition
is false [-Werror,-Wsometimes-uninitialized]
if (mca_addr == UMC_INVALID_ADDR) {
^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/mnt/host/source/src/third_party/kernel/v5.15/drivers/gpu/drm/amd/amdgpu/umc_v6_7.c:485:21:
note: uninitialized use occurs here
if ((REG_GET_FIELD(mc_umc_status, MCA_UMC_UMC0_MCUMC_STATUST0, Val) == 1
&&
^~~~~~~~~~~~~
/mnt/host/source/src/third_party/kernel/v5.15/drivers/gpu/drm/amd/amdgpu/../amdgpu/amdgpu.h:1208:5:
note: expanded from macro 'REG_GET_FIELD'
(((value) & REG_FIELD_MASK(reg, field)) >> REG_FIELD_SHIFT(reg, field))
^~~~~
/mnt/host/source/src/third_party/kernel/v5.15/drivers/gpu/drm/amd/amdgpu/umc_v6_7.c:463:2:
note: remove the 'if' if its condition is always true
if (mca_addr == UMC_INVALID_ADDR) {
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/mnt/host/source/src/third_party/kernel/v5.15/drivers/gpu/drm/amd/amdgpu/umc_v6_7.c:460:24:
note: initialize the variable 'mc_umc_status' to silence this warning
uint64_t mc_umc_status, mc_umc_addrt0;
^
= 0
1 error generated.
make[5]: ***
[/mnt/host/source/src/third_party/kernel/v5.15/scripts/Makefile.build:289:
drivers/gpu/drm/amd/amdgpu/umc_v6_7.o] Error 1
Fix by initializing mc_umc_status = 0.
Fixes: d8e19e32945e ("drm/amdgpu: support to convert dedicated umc mca address")
Signed-off-by: Leo Li <sunpeng...@amd.com>
Reviewed-by: Hamza Mahfooz <hamza.mahf...@amd.com>
---
drivers/gpu/drm/amd/amdgpu/umc_v6_7.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/umc_v6_7.c
b/drivers/gpu/drm/amd/amdgpu/umc_v6_7.c
index 2cc961534542..a0d19b768346 100644
--- a/drivers/gpu/drm/amd/amdgpu/umc_v6_7.c
+++ b/drivers/gpu/drm/amd/amdgpu/umc_v6_7.c
@@ -457,7 +457,7 @@ static void umc_v6_7_query_error_address(struct
amdgpu_device *adev,
{
uint32_t mc_umc_status_addr;
uint32_t channel_index;
- uint64_t mc_umc_status, mc_umc_addrt0;
+ uint64_t mc_umc_status = 0, mc_umc_addrt0;
uint64_t err_addr, soc_pa, retired_page, column;
if (mca_addr == UMC_INVALID_ADDR) {
--
Hamza
