CC: [email protected] CC: [email protected] CC: [email protected] TO: Phong LE <[email protected]> CC: Neil Armstrong <[email protected]> CC: Robert Foss <[email protected]>
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: c7d102232649226a69dddd58a4942cf13cff4f7c commit: 988156dc2fc9f260f4296633e47ec9cf0c61a498 drm: bridge: add it66121 driver date: 3 months ago :::::: branch date: 3 days ago :::::: commit date: 3 months ago config: x86_64-randconfig-c001-20210731 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 4f71f59bf3d9914188a11d0c41bedbb339d36ff5) reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # install x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=988156dc2fc9f260f4296633e47ec9cf0c61a498 git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 988156dc2fc9f260f4296633e47ec9cf0c61a498 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 clang-analyzer If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <[email protected]> clang-analyzer warnings: (new ones prefixed by >>) drivers/gpu/drm/radeon/evergreen.c:2741:2: note: Loop condition is true. Entering loop body for (i = 0; i < rdev->num_crtc; i++) { ^ drivers/gpu/drm/radeon/evergreen.c:2742:7: note: Branch condition evaluates to a garbage value if (save->crtc_enabled[i]) { ^~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/radeon/evergreen.c:3978:3: warning: Value stored to 'tmp' is never read [clang-analyzer-deadcode.DeadStores] tmp = RREG32(GRBM_SOFT_RESET); ^ drivers/gpu/drm/radeon/evergreen.c:3978:3: note: Value stored to 'tmp' is never read drivers/gpu/drm/radeon/evergreen.c:3992:3: warning: Value stored to 'tmp' is never read [clang-analyzer-deadcode.DeadStores] tmp = RREG32(SRBM_SOFT_RESET); ^ drivers/gpu/drm/radeon/evergreen.c:3992:3: note: Value stored to 'tmp' is never read Suppressed 6 warnings (6 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 9 warnings generated. drivers/gpu/drm/amd/amdgpu/amdgpu_securedisplay.c:135:67: warning: Assigned value is garbage or undefined [clang-analyzer-core.uninitialized.Assign] securedisplay_cmd->securedisplay_in_message.send_roi_crc.phy_id = phy_id; ^ ~~~~~~ drivers/gpu/drm/amd/amdgpu/amdgpu_securedisplay.c:93:2: note: 'phy_id' declared without an initial value uint32_t phy_id; ^~~~~~~~~~~~~~~ drivers/gpu/drm/amd/amdgpu/amdgpu_securedisplay.c:100:6: note: Assuming the condition is false if (*pos || size > sizeof(str) - 1) ^~~~ drivers/gpu/drm/amd/amdgpu/amdgpu_securedisplay.c:100:6: note: Left side of '||' is false drivers/gpu/drm/amd/amdgpu/amdgpu_securedisplay.c:100:14: note: Assuming the condition is false if (*pos || size > sizeof(str) - 1) ^~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/amd/amdgpu/amdgpu_securedisplay.c:100:2: note: Taking false branch if (*pos || size > sizeof(str) - 1) ^ drivers/gpu/drm/amd/amdgpu/amdgpu_securedisplay.c:104:8: note: Calling 'copy_from_user' ret = copy_from_user(str, buf, size); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/uaccess.h:191:2: note: Taking true branch if (likely(check_copy_size(to, n, false))) ^ include/linux/uaccess.h:193:2: note: Returning value (loaded from 'n'), which participates in a condition later return n; ^~~~~~~~ drivers/gpu/drm/amd/amdgpu/amdgpu_securedisplay.c:104:8: note: Returning from 'copy_from_user' ret = copy_from_user(str, buf, size); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/amd/amdgpu/amdgpu_securedisplay.c:105:6: note: Assuming 'ret' is 0 if (ret) ^~~ drivers/gpu/drm/amd/amdgpu/amdgpu_securedisplay.c:105:2: note: Taking false branch if (ret) ^ drivers/gpu/drm/amd/amdgpu/amdgpu_securedisplay.c:109:6: note: Assuming 'ret' is >= 0 if (ret < 0) { ^~~~~~~ drivers/gpu/drm/amd/amdgpu/amdgpu_securedisplay.c:109:2: note: Taking false branch if (ret < 0) { ^ drivers/gpu/drm/amd/amdgpu/amdgpu_securedisplay.c:114:6: note: Assuming 'size' is < 3 if (size < 3) ^~~~~~~~ drivers/gpu/drm/amd/amdgpu/amdgpu_securedisplay.c:114:2: note: Taking true branch if (size < 3) ^ drivers/gpu/drm/amd/amdgpu/amdgpu_securedisplay.c:119:2: note: Control jumps to 'case 2:' at line 132 switch (op) { ^ drivers/gpu/drm/amd/amdgpu/amdgpu_securedisplay.c:135:67: note: Assigned value is garbage or undefined securedisplay_cmd->securedisplay_in_message.send_roi_crc.phy_id = phy_id; ^ ~~~~~~ Suppressed 8 warnings (8 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 3 warnings generated. Suppressed 3 warnings (3 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 4 warnings generated. Suppressed 4 warnings (4 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 4 warnings generated. Suppressed 4 warnings (4 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 9 warnings generated. drivers/gpu/drm/bridge/adv7511/adv7511_drv.c:508:3: warning: Value stored to 'ret' is never read [clang-analyzer-deadcode.DeadStores] ret = wait_event_interruptible_timeout(adv7511->wq, ^ drivers/gpu/drm/bridge/adv7511/adv7511_drv.c:508:3: note: Value stored to 'ret' is never read Suppressed 8 warnings (7 in non-user code, 1 with check filters). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 6 warnings generated. Suppressed 6 warnings (6 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 6 warnings generated. Suppressed 6 warnings (6 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 5 warnings generated. Suppressed 5 warnings (5 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 6 warnings generated. Suppressed 6 warnings (6 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 7 warnings generated. >> drivers/gpu/drm/bridge/ite-it66121.c:538:2: warning: Value stored to 'ret' >> is never read [clang-analyzer-deadcode.DeadStores] ret = drm_bridge_attach(bridge->encoder, ctx->next_bridge, bridge, flags); ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/bridge/ite-it66121.c:538:2: note: Value stored to 'ret' is never read ret = drm_bridge_attach(bridge->encoder, ctx->next_bridge, bridge, flags); ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Suppressed 6 warnings (6 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 7 warnings generated. drivers/gpu/drm/bridge/analogix/analogix-anx78xx.c:536:2: warning: Value stored to 'err' is never read [clang-analyzer-deadcode.DeadStores] err = anx78xx_clear_bits(anx78xx->map[I2C_IDX_TX_P2], ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/bridge/analogix/analogix-anx78xx.c:536:2: note: Value stored to 'err' is never read err = anx78xx_clear_bits(anx78xx->map[I2C_IDX_TX_P2], ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Suppressed 6 warnings (6 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 6 warnings generated. Suppressed 6 warnings (6 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 6 warnings generated. drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c:424:2: warning: Value stored to 'reg' is never read [clang-analyzer-deadcode.DeadStores] reg = readl(dp->reg_base + ANALOGIX_DP_SYS_CTL_3); ^ drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c:424:2: note: Value stored to 'reg' is never read Suppressed 5 warnings (5 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 4 warnings generated. Suppressed 4 warnings (4 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 5 warnings generated. Suppressed 5 warnings (5 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 5 warnings generated. Suppressed 5 warnings (5 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 7 warnings generated. Suppressed 7 warnings (7 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 4 warnings generated. Suppressed 4 warnings (4 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 4 warnings generated. Suppressed 4 warnings (4 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 4 warnings generated. drivers/mfd/vx855.c:89:2: warning: Value stored to 'ret' is never read [clang-analyzer-deadcode.DeadStores] ret = mfd_add_devices(&pdev->dev, -1, vx855_cells, ARRAY_SIZE(vx855_cells), ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/mfd/vx855.c:89:2: note: Value stored to 'ret' is never read ret = mfd_add_devices(&pdev->dev, -1, vx855_cells, ARRAY_SIZE(vx855_cells), ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Suppressed 3 warnings (3 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 3 warnings generated. Suppressed 3 warnings (3 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 4 warnings generated. Suppressed 4 warnings (4 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 3 warnings generated. Suppressed 3 warnings (3 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 4 warnings generated. Suppressed 4 warnings (4 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 3 warnings generated. Suppressed 3 warnings (3 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 3 warnings generated. Suppressed 3 warnings (3 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 3 warnings generated. Suppressed 3 warnings (3 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 4 warnings generated. Suppressed 4 warnings (4 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 5 warnings generated. Suppressed 5 warnings (5 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 4 warnings generated. Suppressed 4 warnings (4 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 4 warnings generated. Suppressed 4 warnings (4 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 3 warnings generated. Suppressed 3 warnings (3 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 3 warnings generated. Suppressed 3 warnings (3 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 2 warnings generated. Suppressed 2 warnings (2 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 3 warnings generated. Suppressed 3 warnings (3 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 4 warnings generated. drivers/tty/serial/8250/8250_pci.c:1298:9: warning: Although the value stored to 'tmp' is used in the enclosing expression, the value is never actually read from 'tmp' [clang-analyzer-deadcode.DeadStores] vim +/ret +538 drivers/gpu/drm/bridge/ite-it66121.c 988156dc2fc9f2 Phong LE 2021-04-19 528 988156dc2fc9f2 Phong LE 2021-04-19 529 static int it66121_bridge_attach(struct drm_bridge *bridge, 988156dc2fc9f2 Phong LE 2021-04-19 530 enum drm_bridge_attach_flags flags) 988156dc2fc9f2 Phong LE 2021-04-19 531 { 988156dc2fc9f2 Phong LE 2021-04-19 532 struct it66121_ctx *ctx = container_of(bridge, struct it66121_ctx, bridge); 988156dc2fc9f2 Phong LE 2021-04-19 533 int ret; 988156dc2fc9f2 Phong LE 2021-04-19 534 988156dc2fc9f2 Phong LE 2021-04-19 535 if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) 988156dc2fc9f2 Phong LE 2021-04-19 536 return -EINVAL; 988156dc2fc9f2 Phong LE 2021-04-19 537 988156dc2fc9f2 Phong LE 2021-04-19 @538 ret = drm_bridge_attach(bridge->encoder, ctx->next_bridge, bridge, flags); 988156dc2fc9f2 Phong LE 2021-04-19 539 988156dc2fc9f2 Phong LE 2021-04-19 540 ret = regmap_write_bits(ctx->regmap, IT66121_CLK_BANK_REG, 988156dc2fc9f2 Phong LE 2021-04-19 541 IT66121_CLK_BANK_PWROFF_RCLK, 0); 988156dc2fc9f2 Phong LE 2021-04-19 542 if (ret) 988156dc2fc9f2 Phong LE 2021-04-19 543 return ret; 988156dc2fc9f2 Phong LE 2021-04-19 544 988156dc2fc9f2 Phong LE 2021-04-19 545 ret = regmap_write_bits(ctx->regmap, IT66121_INT_REG, 988156dc2fc9f2 Phong LE 2021-04-19 546 IT66121_INT_TX_CLK_OFF, 0); 988156dc2fc9f2 Phong LE 2021-04-19 547 if (ret) 988156dc2fc9f2 Phong LE 2021-04-19 548 return ret; 988156dc2fc9f2 Phong LE 2021-04-19 549 988156dc2fc9f2 Phong LE 2021-04-19 550 ret = regmap_write_bits(ctx->regmap, IT66121_AFE_DRV_REG, 988156dc2fc9f2 Phong LE 2021-04-19 551 IT66121_AFE_DRV_PWD, 0); 988156dc2fc9f2 Phong LE 2021-04-19 552 if (ret) 988156dc2fc9f2 Phong LE 2021-04-19 553 return ret; 988156dc2fc9f2 Phong LE 2021-04-19 554 988156dc2fc9f2 Phong LE 2021-04-19 555 ret = regmap_write_bits(ctx->regmap, IT66121_AFE_XP_REG, 988156dc2fc9f2 Phong LE 2021-04-19 556 IT66121_AFE_XP_PWDI | IT66121_AFE_XP_PWDPLL, 0); 988156dc2fc9f2 Phong LE 2021-04-19 557 if (ret) 988156dc2fc9f2 Phong LE 2021-04-19 558 return ret; 988156dc2fc9f2 Phong LE 2021-04-19 559 988156dc2fc9f2 Phong LE 2021-04-19 560 ret = regmap_write_bits(ctx->regmap, IT66121_AFE_IP_REG, 988156dc2fc9f2 Phong LE 2021-04-19 561 IT66121_AFE_IP_PWDPLL, 0); 988156dc2fc9f2 Phong LE 2021-04-19 562 if (ret) 988156dc2fc9f2 Phong LE 2021-04-19 563 return ret; 988156dc2fc9f2 Phong LE 2021-04-19 564 988156dc2fc9f2 Phong LE 2021-04-19 565 ret = regmap_write_bits(ctx->regmap, IT66121_AFE_DRV_REG, 988156dc2fc9f2 Phong LE 2021-04-19 566 IT66121_AFE_DRV_RST, 0); 988156dc2fc9f2 Phong LE 2021-04-19 567 if (ret) 988156dc2fc9f2 Phong LE 2021-04-19 568 return ret; 988156dc2fc9f2 Phong LE 2021-04-19 569 988156dc2fc9f2 Phong LE 2021-04-19 570 ret = regmap_write_bits(ctx->regmap, IT66121_AFE_XP_REG, 988156dc2fc9f2 Phong LE 2021-04-19 571 IT66121_AFE_XP_RESETB, IT66121_AFE_XP_RESETB); 988156dc2fc9f2 Phong LE 2021-04-19 572 if (ret) 988156dc2fc9f2 Phong LE 2021-04-19 573 return ret; 988156dc2fc9f2 Phong LE 2021-04-19 574 988156dc2fc9f2 Phong LE 2021-04-19 575 ret = regmap_write_bits(ctx->regmap, IT66121_AFE_IP_REG, 988156dc2fc9f2 Phong LE 2021-04-19 576 IT66121_AFE_IP_RESETB, IT66121_AFE_IP_RESETB); 988156dc2fc9f2 Phong LE 2021-04-19 577 if (ret) 988156dc2fc9f2 Phong LE 2021-04-19 578 return ret; 988156dc2fc9f2 Phong LE 2021-04-19 579 988156dc2fc9f2 Phong LE 2021-04-19 580 ret = regmap_write_bits(ctx->regmap, IT66121_SW_RST_REG, 988156dc2fc9f2 Phong LE 2021-04-19 581 IT66121_SW_RST_REF, 988156dc2fc9f2 Phong LE 2021-04-19 582 IT66121_SW_RST_REF); 988156dc2fc9f2 Phong LE 2021-04-19 583 if (ret) 988156dc2fc9f2 Phong LE 2021-04-19 584 return ret; 988156dc2fc9f2 Phong LE 2021-04-19 585 988156dc2fc9f2 Phong LE 2021-04-19 586 /* Per programming manual, sleep here for bridge to settle */ 988156dc2fc9f2 Phong LE 2021-04-19 587 msleep(50); 988156dc2fc9f2 Phong LE 2021-04-19 588 988156dc2fc9f2 Phong LE 2021-04-19 589 /* Start interrupts */ 988156dc2fc9f2 Phong LE 2021-04-19 590 return regmap_write_bits(ctx->regmap, IT66121_INT_MASK1_REG, 988156dc2fc9f2 Phong LE 2021-04-19 591 IT66121_INT_MASK1_DDC_NOACK | 988156dc2fc9f2 Phong LE 2021-04-19 592 IT66121_INT_MASK1_DDC_FIFOERR | 988156dc2fc9f2 Phong LE 2021-04-19 593 IT66121_INT_MASK1_DDC_BUSHANG, 0); 988156dc2fc9f2 Phong LE 2021-04-19 594 } 988156dc2fc9f2 Phong LE 2021-04-19 595 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/[email protected]
.config.gz
Description: application/gzip
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