drm/amdgpu: fix error handling in df_v3_6_pmc_start

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When df_v3_6_pmc_get_ctrl_settings() fails for some reason, we
store uninitialized data in a register, as gcc points out:

drivers/gpu/drm/amd/amdgpu/df_v3_6.c: In function 'df_v3_6_pmc_start':
drivers/gpu/drm/amd/amdgpu/amdgpu.h:1012:29: error: 'lo_val' may be used uninitialized in this function [-Werror=maybe-uninitialized]
 #define WREG32_PCIE(reg, v) adev->pcie_wreg(adev, (reg), (v))
                             ^~~~
drivers/gpu/drm/amd/amdgpu/df_v3_6.c:334:39: note: 'lo_val' was declared here
  uint32_t lo_base_addr, hi_base_addr, lo_val, hi_val;
                                       ^~~~~~

Make it return a proper error code that we can catch in the caller.

Fixes: 992af942a6 ("drm/amdgpu: add df perfmon regs and funcs for xgmi")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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Arnd Bergmann 2019-06-17 14:51:45 +02:00 • committed by Alex Deucher

parent b6bb56ac7d

commit e1a2f2d23a

1 changed files with 9 additions and 4 deletions

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drivers/gpu/drm/amd/amdgpu/df_v3_6.c

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