* drivers/gpu/drm/bridge/ite-it66121.c:538:2: warning: Value stored to 'ret' is never read [clang-analyzer-deadcode.DeadStores]
@ 2021-08-02 13:16 kernel test robot
2021-08-03 9:06 ` kernel test robot
0 siblings, 1 reply; 3+ messages in thread
From: kernel test robot @ 2021-08-02 13:16 UTC (permalink / raw)
To: kbuild
[-- Attachment #1: Type: text/plain, Size: 20567 bytes --]
CC: clang-built-linux(a)googlegroups.com
CC: kbuild-all(a)lists.01.org
CC: linux-kernel(a)vger.kernel.org
TO: Phong LE <ple@baylibre.com>
CC: Neil Armstrong <narmstrong@baylibre.com>
CC: Robert Foss <robert.foss@linaro.org>
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 <lkp@intel.com>
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:' @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/kbuild-all(a)lists.01.org
[-- Attachment #2: config.gz --]
[-- Type: application/gzip, Size: 34456 bytes --]
^ permalink raw reply [flat|nested] 3+ messages in thread
* drivers/gpu/drm/bridge/ite-it66121.c:538:2: warning: Value stored to 'ret' is never read [clang-analyzer-deadcode.DeadStores]
2021-08-02 13:16 drivers/gpu/drm/bridge/ite-it66121.c:538:2: warning: Value stored to 'ret' is never read [clang-analyzer-deadcode.DeadStores] kernel test robot
@ 2021-08-03 9:06 ` kernel test robot
0 siblings, 0 replies; 3+ messages in thread
From: kernel test robot @ 2021-08-03 9:06 UTC (permalink / raw)
To: Phong LE; +Cc: clang-built-linux, kbuild-all, LKML, Neil Armstrong, Robert Foss
[-- Attachment #1: Type: text/plain, Size: 20147 bytes --]
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 <lkp@intel.com>
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/kbuild-all@lists.01.org
[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 34456 bytes --]
[-- Attachment #3: Attached Message Part --]
[-- Type: text/plain, Size: 150 bytes --]
_______________________________________________
kbuild mailing list -- kbuild@lists.01.org
To unsubscribe send an email to kbuild-leave@lists.01.org
^ permalink raw reply [flat|nested] 3+ messages in thread
* drivers/gpu/drm/bridge/ite-it66121.c:538:2: warning: Value stored to 'ret' is never read [clang-analyzer-deadcode.DeadStores]
@ 2021-08-03 9:06 ` kernel test robot
0 siblings, 0 replies; 3+ messages in thread
From: kernel test robot @ 2021-08-03 9:06 UTC (permalink / raw)
To: kbuild-all
[-- Attachment #1: Type: text/plain, Size: 20548 bytes --]
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 <lkp@intel.com>
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:' @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/kbuild-all(a)lists.01.org
[-- Attachment #2: config.gz --]
[-- Type: application/gzip, Size: 34456 bytes --]
[-- Attachment #3: AttachedMessagePart.ksh --]
[-- Type: text/plain, Size: 150 bytes --]
_______________________________________________
kbuild mailing list -- kbuild@lists.01.org
To unsubscribe send an email to kbuild-leave@lists.01.org
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2021-08-03 9:06 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-08-02 13:16 drivers/gpu/drm/bridge/ite-it66121.c:538:2: warning: Value stored to 'ret' is never read [clang-analyzer-deadcode.DeadStores] kernel test robot
2021-08-03 9:06 ` kernel test robot
2021-08-03 9:06 ` kernel test robot
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.