From: kernel test robot <lkp@intel.com>
To: kbuild@lists.01.org
Subject: drivers/media/i2c/hi846.c:1494:21: warning: Value stored to 'client' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
Date: Wed, 16 Mar 2022 22:14:52 +0800 [thread overview]
Message-ID: <202203162216.Ysr2MNY0-lkp@intel.com> (raw)
[-- Attachment #1: Type: text/plain, Size: 19059 bytes --]
CC: llvm(a)lists.linux.dev
CC: kbuild-all(a)lists.01.org
BCC: lkp(a)intel.com
CC: linux-kernel(a)vger.kernel.org
TO: Martin Kepplinger <martin.kepplinger@puri.sm>
CC: Mauro Carvalho Chehab <mchehab@kernel.org>
CC: linux-media(a)vger.kernel.org
CC: Pavel Machek <pavel@ucw.cz>
CC: Sakari Ailus <sakari.ailus@linux.intel.com>
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 56e337f2cf1326323844927a04e9dbce9a244835
commit: e8c0882685f9152f0d729664a12bcbe749cb7736 media: i2c: add driver for the SK Hynix Hi-846 8M pixel camera
date: 5 months ago
:::::: branch date: 21 hours ago
:::::: commit date: 5 months ago
config: riscv-randconfig-c006-20220307 (https://download.01.org/0day-ci/archive/20220316/202203162216.Ysr2MNY0-lkp(a)intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project d271fc04d5b97b12e6b797c6067d3c96a8d7470e)
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 riscv cross compiling tool for clang build
# apt-get install binutils-riscv64-linux-gnu
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e8c0882685f9152f0d729664a12bcbe749cb7736
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout e8c0882685f9152f0d729664a12bcbe749cb7736
# save the config file to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=riscv 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 >>)
^ ~
fs/xfs/xfs_icache.c:746:2: note: Value stored to 'error' is never read
error = 0;
^ ~
fs/xfs/xfs_icache.c:1667:2: warning: Value stored to 'nr_found' is never read [clang-analyzer-deadcode.DeadStores]
nr_found = 0;
^ ~
fs/xfs/xfs_icache.c:1667:2: note: Value stored to 'nr_found' is never read
nr_found = 0;
^ ~
Suppressed 10 warnings (9 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.
9 warnings generated.
Suppressed 9 warnings (9 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.
Suppressed 9 warnings (9 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.
Suppressed 9 warnings (9 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.
Suppressed 9 warnings (9 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.
Suppressed 9 warnings (9 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.
12 warnings generated.
Suppressed 12 warnings (9 in non-user code, 3 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.
9 warnings generated.
Suppressed 9 warnings (9 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.
Suppressed 9 warnings (9 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.
Suppressed 9 warnings (9 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.
Suppressed 9 warnings (9 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.
10 warnings generated.
Suppressed 10 warnings (10 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.
17 warnings generated.
drivers/media/pci/saa7164/saa7164-encoder.c:597:2: warning: Value stored to 'ret' is never read [clang-analyzer-deadcode.DeadStores]
ret = saa7164_encoder_pause_port(port);
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/media/pci/saa7164/saa7164-encoder.c:597:2: note: Value stored to 'ret' is never read
ret = saa7164_encoder_pause_port(port);
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/media/pci/saa7164/saa7164-encoder.c:598:2: warning: Value stored to 'ret' is never read [clang-analyzer-deadcode.DeadStores]
ret = saa7164_encoder_acquire_port(port);
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/media/pci/saa7164/saa7164-encoder.c:598:2: note: Value stored to 'ret' is never read
ret = saa7164_encoder_acquire_port(port);
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Suppressed 15 warnings (15 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.
18 warnings generated.
drivers/media/pci/saa7164/saa7164-vbi.c:281:2: warning: Value stored to 'ret' is never read [clang-analyzer-deadcode.DeadStores]
ret = saa7164_vbi_pause_port(port);
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/media/pci/saa7164/saa7164-vbi.c:281:2: note: Value stored to 'ret' is never read
ret = saa7164_vbi_pause_port(port);
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/media/pci/saa7164/saa7164-vbi.c:282:2: warning: Value stored to 'ret' is never read [clang-analyzer-deadcode.DeadStores]
ret = saa7164_vbi_acquire_port(port);
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/media/pci/saa7164/saa7164-vbi.c:282:2: note: Value stored to 'ret' is never read
ret = saa7164_vbi_acquire_port(port);
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/media/pci/saa7164/saa7164-vbi.c:381:3: warning: Value stored to 'result' is never read [clang-analyzer-deadcode.DeadStores]
result = saa7164_vbi_acquire_port(port);
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/media/pci/saa7164/saa7164-vbi.c:381:3: note: Value stored to 'result' is never read
result = saa7164_vbi_acquire_port(port);
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Suppressed 15 warnings (15 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.
Suppressed 9 warnings (9 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/media/i2c/ccs-pll.c:93:15: warning: Value stored to 's' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
const char *s = pll_string(br->which);
^ ~~~~~~~~~~~~~~~~~~~~~
drivers/media/i2c/ccs-pll.c:93:15: note: Value stored to 's' during its initialization is never read
const char *s = pll_string(br->which);
^ ~~~~~~~~~~~~~~~~~~~~~
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.
8 warnings generated.
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.
9 warnings generated.
Suppressed 9 warnings (9 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.
12 warnings generated.
>> drivers/media/i2c/hi846.c:1494:21: warning: Value stored to 'client' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
struct i2c_client *client = v4l2_get_subdevdata(&hi846->sd);
^~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/media/i2c/hi846.c:1494:21: note: Value stored to 'client' during its initialization is never read
struct i2c_client *client = v4l2_get_subdevdata(&hi846->sd);
^~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/media/i2c/hi846.c:1764:2: warning: Value stored to 'tgt_fps' is never read [clang-analyzer-deadcode.DeadStores]
tgt_fps = hi846->cur_mode->fps;
^ ~~~~~~~~~~~~~~~~~~~~
drivers/media/i2c/hi846.c:1764:2: note: Value stored to 'tgt_fps' is never read
tgt_fps = hi846->cur_mode->fps;
^ ~~~~~~~~~~~~~~~~~~~~
drivers/media/i2c/hi846.c:1805:21: warning: Value stored to 'client' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
struct i2c_client *client = v4l2_get_subdevdata(sd);
^~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~
drivers/media/i2c/hi846.c:1805:21: note: Value stored to 'client' during its initialization is never read
struct i2c_client *client = v4l2_get_subdevdata(sd);
^~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~
Suppressed 9 warnings (9 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.
Suppressed 9 warnings (9 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.
10 warnings generated.
drivers/media/i2c/imx258.c:781:3: warning: Value stored to 'ret' is never read [clang-analyzer-deadcode.DeadStores]
ret = imx258_write_reg(imx258, IMX258_REG_TEST_PATTERN,
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/media/i2c/imx258.c:781:3: note: Value stored to 'ret' is never read
ret = imx258_write_reg(imx258, IMX258_REG_TEST_PATTERN,
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Suppressed 9 warnings (9 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.
fs/udf/balloc.c:543:13: warning: The result of the left shift is undefined because the left operand is negative [clang-analyzer-core.UndefinedBinaryOperatorResult]
(etype << 30) | elen, 1);
^
fs/udf/balloc.c:680:6: note: Assuming the condition is false
if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP)
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
fs/udf/balloc.c:680:2: note: Taking false branch
if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP)
^
fs/udf/balloc.c:685:11: note: Assuming the condition is true
else if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE)
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
fs/udf/balloc.c:685:7: note: Taking true branch
else if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE)
^
fs/udf/balloc.c:686:15: note: Calling 'udf_table_prealloc_blocks'
allocated = udf_table_prealloc_blocks(sb,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
fs/udf/balloc.c:510:6: note: Assuming 'first_block' is < field 's_partition_len'
if (first_block >= sbi->s_partmaps[partition].s_partition_len)
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
fs/udf/balloc.c:510:2: note: Taking false branch
if (first_block >= sbi->s_partmaps[partition].s_partition_len)
^
fs/udf/balloc.c:514:6: note: Assuming field 'i_alloc_type' is equal to ICBTAG_FLAG_AD_SHORT
if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
fs/udf/balloc.c:514:2: note: Taking true branch
if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
^
fs/udf/balloc.c:527:9: note: 'first_block' is not equal to field 'logicalBlockNum'
while (first_block != eloc.logicalBlockNum &&
^~~~~~~~~~~
fs/udf/balloc.c:527:9: note: Left side of '&&' is true
fs/udf/balloc.c:528:10: note: Value assigned to 'etype'
(etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1) {
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
fs/udf/balloc.c:528:9: note: Assuming the condition is false
(etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1) {
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
fs/udf/balloc.c:527:2: note: Loop condition is false. Execution continues on line 534
while (first_block != eloc.logicalBlockNum &&
^
fs/udf/balloc.c:534:6: note: Assuming 'first_block' is equal to field 'logicalBlockNum'
if (first_block == eloc.logicalBlockNum) {
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
fs/udf/balloc.c:534:2: note: Taking true branch
if (first_block == eloc.logicalBlockNum) {
^
fs/udf/balloc.c:538:7: note: Assuming 'alloc_count' is > 'block_count'
if (alloc_count > block_count) {
^~~~~~~~~~~~~~~~~~~~~~~~~
fs/udf/balloc.c:538:3: note: Taking true branch
if (alloc_count > block_count) {
^
fs/udf/balloc.c:543:13: note: The result of the left shift is undefined because the left operand is negative
(etype << 30) | elen, 1);
~~~~~ ^
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.
9 warnings generated.
drivers/misc/habanalabs/gaudi/gaudi_coresight.c:770:31: warning: Value stored to 'input' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
struct hl_debug_params_spmu *input = params->input;
^~~~~ ~~~~~~~~~~~~~
drivers/misc/habanalabs/gaudi/gaudi_coresight.c:770:31: note: Value stored to 'input' during its initialization is never read
struct hl_debug_params_spmu *input = params->input;
^~~~~ ~~~~~~~~~~~~~
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.
9 warnings generated.
drivers/misc/habanalabs/common/debugfs.c:858:3: warning: Value stored to 'rc' is never read [clang-analyzer-deadcode.DeadStores]
rc = pci_enable_device(hdev->pdev);
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/misc/habanalabs/common/debugfs.c:858:3: note: Value stored to 'rc' is never read
vim +/client +1494 drivers/media/i2c/hi846.c
e8c0882685f9152 Martin Kepplinger 2021-09-06 1491
e8c0882685f9152 Martin Kepplinger 2021-09-06 1492 static int hi846_set_video_mode(struct hi846 *hi846, int fps)
e8c0882685f9152 Martin Kepplinger 2021-09-06 1493 {
e8c0882685f9152 Martin Kepplinger 2021-09-06 @1494 struct i2c_client *client = v4l2_get_subdevdata(&hi846->sd);
e8c0882685f9152 Martin Kepplinger 2021-09-06 1495 u64 frame_length;
e8c0882685f9152 Martin Kepplinger 2021-09-06 1496 int ret = 0;
e8c0882685f9152 Martin Kepplinger 2021-09-06 1497 int dummy_lines;
e8c0882685f9152 Martin Kepplinger 2021-09-06 1498 u64 link_freq = hi846_get_link_freq(hi846);
e8c0882685f9152 Martin Kepplinger 2021-09-06 1499
e8c0882685f9152 Martin Kepplinger 2021-09-06 1500 dev_dbg(&client->dev, "%s: link freq: %llu\n", __func__,
e8c0882685f9152 Martin Kepplinger 2021-09-06 1501 hi846_get_link_freq(hi846));
e8c0882685f9152 Martin Kepplinger 2021-09-06 1502
e8c0882685f9152 Martin Kepplinger 2021-09-06 1503 do_div(link_freq, fps);
e8c0882685f9152 Martin Kepplinger 2021-09-06 1504 frame_length = link_freq;
e8c0882685f9152 Martin Kepplinger 2021-09-06 1505 do_div(frame_length, HI846_LINE_LENGTH);
e8c0882685f9152 Martin Kepplinger 2021-09-06 1506
e8c0882685f9152 Martin Kepplinger 2021-09-06 1507 dummy_lines = (frame_length > hi846->cur_mode->frame_len) ?
e8c0882685f9152 Martin Kepplinger 2021-09-06 1508 (frame_length - hi846->cur_mode->frame_len) : 0;
e8c0882685f9152 Martin Kepplinger 2021-09-06 1509
e8c0882685f9152 Martin Kepplinger 2021-09-06 1510 frame_length = hi846->cur_mode->frame_len + dummy_lines;
e8c0882685f9152 Martin Kepplinger 2021-09-06 1511
e8c0882685f9152 Martin Kepplinger 2021-09-06 1512 dev_dbg(&client->dev, "%s: frame length calculated: %llu\n", __func__,
e8c0882685f9152 Martin Kepplinger 2021-09-06 1513 frame_length);
e8c0882685f9152 Martin Kepplinger 2021-09-06 1514
e8c0882685f9152 Martin Kepplinger 2021-09-06 1515 hi846_write_reg_16(hi846, HI846_REG_FLL, frame_length & 0xFFFF, &ret);
e8c0882685f9152 Martin Kepplinger 2021-09-06 1516 hi846_write_reg_16(hi846, HI846_REG_LLP,
e8c0882685f9152 Martin Kepplinger 2021-09-06 1517 HI846_LINE_LENGTH & 0xFFFF, &ret);
e8c0882685f9152 Martin Kepplinger 2021-09-06 1518
e8c0882685f9152 Martin Kepplinger 2021-09-06 1519 return ret;
e8c0882685f9152 Martin Kepplinger 2021-09-06 1520 }
e8c0882685f9152 Martin Kepplinger 2021-09-06 1521
---
0-DAY CI Kernel Test Service
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org
next reply other threads:[~2022-03-16 14:14 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-16 14:14 kernel test robot [this message]
-- strict thread matches above, loose matches on Subject: below --
2022-03-18 18:16 drivers/media/i2c/hi846.c:1494:21: warning: Value stored to 'client' during its initialization is never read [clang-analyzer-deadcode.DeadStores] kernel test robot
2022-03-12 23:58 kernel test robot
2022-02-27 4:25 kernel test robot
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