linux-kernel - drivers/gpu/drm/amd/amdgpu/../pm/legacy-dpm/kv_dpm.c:1641 kv_get_acp_boot_level() warn: always true condition '(table->entries[i]->clk >= 0) => (0-u32max >= 0)'

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Message-ID: <202203291016.neaMEWPm-lkp@intel.com>
Date:   Tue, 29 Mar 2022 10:56:34 +0800
From:   kernel test robot <lkp@...el.com>
To:     Evan Quan <evan.quan@....com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Alex Deucher <alexander.deucher@....com>,
        Lijo Lazar <lijo.lazar@....com>
Subject: drivers/gpu/drm/amd/amdgpu/../pm/legacy-dpm/kv_dpm.c:1641
 kv_get_acp_boot_level() warn: always true condition '(table->entries[i]->clk
 >= 0) => (0-u32max >= 0)'

Hi Evan,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   1930a6e739c4b4a654a69164dbe39e554d228915
commit: 837d542a09cd533055423dfca7e621a9c1d13c5b drm/amd/pm: relocate the power related headers
date:   2 months ago
config: riscv-randconfig-m031-20220327 (https://download.01.org/0day-ci/archive/20220329/202203291016.neaMEWPm-lkp@intel.com/config)
compiler: riscv32-linux-gcc (GCC) 11.2.0

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>

smatch warnings:
drivers/gpu/drm/amd/amdgpu/../pm/legacy-dpm/kv_dpm.c:1641 kv_get_acp_boot_level() warn: always true condition '(table->entries[i]->clk >= 0) => (0-u32max >= 0)'

vim +1641 drivers/gpu/drm/amd/amdgpu/../pm/legacy-dpm/kv_dpm.c

a2e73f56fa6282 drivers/gpu/drm/amd/amdgpu/kv_dpm.c Alex Deucher 2015-04-20  1633  
a2e73f56fa6282 drivers/gpu/drm/amd/amdgpu/kv_dpm.c Alex Deucher 2015-04-20  1634  static u8 kv_get_acp_boot_level(struct amdgpu_device *adev)
a2e73f56fa6282 drivers/gpu/drm/amd/amdgpu/kv_dpm.c Alex Deucher 2015-04-20  1635  {
a2e73f56fa6282 drivers/gpu/drm/amd/amdgpu/kv_dpm.c Alex Deucher 2015-04-20  1636  	u8 i;
a2e73f56fa6282 drivers/gpu/drm/amd/amdgpu/kv_dpm.c Alex Deucher 2015-04-20  1637  	struct amdgpu_clock_voltage_dependency_table *table =
a2e73f56fa6282 drivers/gpu/drm/amd/amdgpu/kv_dpm.c Alex Deucher 2015-04-20  1638  		&adev->pm.dpm.dyn_state.acp_clock_voltage_dependency_table;
a2e73f56fa6282 drivers/gpu/drm/amd/amdgpu/kv_dpm.c Alex Deucher 2015-04-20  1639  
a2e73f56fa6282 drivers/gpu/drm/amd/amdgpu/kv_dpm.c Alex Deucher 2015-04-20  1640  	for (i = 0; i < table->count; i++) {
a2e73f56fa6282 drivers/gpu/drm/amd/amdgpu/kv_dpm.c Alex Deucher 2015-04-20 @1641  		if (table->entries[i].clk >= 0) /* XXX */
a2e73f56fa6282 drivers/gpu/drm/amd/amdgpu/kv_dpm.c Alex Deucher 2015-04-20  1642  			break;
a2e73f56fa6282 drivers/gpu/drm/amd/amdgpu/kv_dpm.c Alex Deucher 2015-04-20  1643  	}
a2e73f56fa6282 drivers/gpu/drm/amd/amdgpu/kv_dpm.c Alex Deucher 2015-04-20  1644  
a2e73f56fa6282 drivers/gpu/drm/amd/amdgpu/kv_dpm.c Alex Deucher 2015-04-20  1645  	if (i >= table->count)
a2e73f56fa6282 drivers/gpu/drm/amd/amdgpu/kv_dpm.c Alex Deucher 2015-04-20  1646  		i = table->count - 1;
a2e73f56fa6282 drivers/gpu/drm/amd/amdgpu/kv_dpm.c Alex Deucher 2015-04-20  1647  
a2e73f56fa6282 drivers/gpu/drm/amd/amdgpu/kv_dpm.c Alex Deucher 2015-04-20  1648  	return i;
a2e73f56fa6282 drivers/gpu/drm/amd/amdgpu/kv_dpm.c Alex Deucher 2015-04-20  1649  }
a2e73f56fa6282 drivers/gpu/drm/amd/amdgpu/kv_dpm.c Alex Deucher 2015-04-20  1650  

:::::: The code at line 1641 was first introduced by commit
:::::: a2e73f56fa6282481927ec43aa9362c03c2e2104 drm/amdgpu: Add support for CIK parts

:::::: TO: Alex Deucher <alexander.deucher@....com>
:::::: CC: Alex Deucher <alexander.deucher@....com>

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp