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: Sat, 19 Mar 2022 02:16:32 +0800 [thread overview]
Message-ID: <202203190247.dEZtfdcm-lkp@intel.com> (raw)
[-- Attachment #1: Type: text/plain, Size: 19945 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: 551acdc3c3d2b6bc97f11e31dcf960bc36343bfc
commit: e8c0882685f9152f0d729664a12bcbe749cb7736 media: i2c: add driver for the SK Hynix Hi-846 8M pixel camera
date: 5 months ago
:::::: branch date: 22 hours ago
:::::: commit date: 5 months ago
config: riscv-randconfig-c006-20220307 (https://download.01.org/0day-ci/archive/20220319/202203190247.dEZtfdcm-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 >>)
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.
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.
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.
7 warnings generated.
drivers/soc/qcom/qmi_encdec.c:332:4: warning: Value stored to 'rc' is never read [clang-analyzer-deadcode.DeadStores]
rc = qmi_encode_basic_elem(&opt_flag_value, buf_src,
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/soc/qcom/qmi_encdec.c:332:4: note: Value stored to 'rc' is never read
rc = qmi_encode_basic_elem(&opt_flag_value, buf_src,
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.
15 warnings generated.
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.
11 warnings generated.
Suppressed 11 warnings (11 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.
15 warnings generated.
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.
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.
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.
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.
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.
9 warnings generated.
drivers/accessibility/speakup/speakup_apollo.c:147:3: warning: Value stored to 'jiffy_delta_val' is never read [clang-analyzer-deadcode.DeadStores]
jiffy_delta_val = jiffy_delta->u.n.value;
^ ~~~~~~~~~~~~~~~~~~~~~~
drivers/accessibility/speakup/speakup_apollo.c:147:3: note: Value stored to 'jiffy_delta_val' is never read
jiffy_delta_val = jiffy_delta->u.n.value;
^ ~~~~~~~~~~~~~~~~~~~~~~
drivers/accessibility/speakup/speakup_apollo.c:148:3: warning: Value stored to 'full_time_val' is never read [clang-analyzer-deadcode.DeadStores]
full_time_val = full_time->u.n.value;
^ ~~~~~~~~~~~~~~~~~~~~
drivers/accessibility/speakup/speakup_apollo.c:148:3: note: Value stored to 'full_time_val' is never read
full_time_val = full_time->u.n.value;
^ ~~~~~~~~~~~~~~~~~~~~
drivers/accessibility/speakup/speakup_apollo.c:149:3: warning: Value stored to 'delay_time_val' is never read [clang-analyzer-deadcode.DeadStores]
delay_time_val = delay_time->u.n.value;
^ ~~~~~~~~~~~~~~~~~~~~~
drivers/accessibility/speakup/speakup_apollo.c:149:3: note: Value stored to 'delay_time_val' is never read
delay_time_val = delay_time->u.n.value;
^ ~~~~~~~~~~~~~~~~~~~~~
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.
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.
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/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.
9 warnings generated.
Suppressed 9 warnings (6 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.
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.
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.
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.
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.
12 warnings generated.
lib/zstd/decompress.c:1557:4: warning: Value stored to 'remainingSize' is never read [clang-analyzer-deadcode.DeadStores]
remainingSize -= 4;
^ ~
lib/zstd/decompress.c:1557:4: note: Value stored to 'remainingSize' is never read
remainingSize -= 4;
^ ~
Suppressed 11 warnings (6 in non-user code, 5 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.
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.
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.
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.
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.
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.
Suppressed 7 warnings (5 in non-user code, 2 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.
drivers/media/mc/mc-request.c:190:23: warning: Value stored to 'mdev' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
struct media_device *mdev = req->mdev;
^~~~ ~~~~~~~~~
drivers/media/mc/mc-request.c:190:23: note: Value stored to 'mdev' during its initialization is never read
struct media_device *mdev = req->mdev;
^~~~ ~~~~~~~~~
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.
15 warnings generated.
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.
15 warnings generated.
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.
15 warnings generated.
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.
vim +/client +1494 drivers/media/i2c/hi846.c
e8c0882685f915 Martin Kepplinger 2021-09-06 1491
e8c0882685f915 Martin Kepplinger 2021-09-06 1492 static int hi846_set_video_mode(struct hi846 *hi846, int fps)
e8c0882685f915 Martin Kepplinger 2021-09-06 1493 {
e8c0882685f915 Martin Kepplinger 2021-09-06 @1494 struct i2c_client *client = v4l2_get_subdevdata(&hi846->sd);
e8c0882685f915 Martin Kepplinger 2021-09-06 1495 u64 frame_length;
e8c0882685f915 Martin Kepplinger 2021-09-06 1496 int ret = 0;
e8c0882685f915 Martin Kepplinger 2021-09-06 1497 int dummy_lines;
e8c0882685f915 Martin Kepplinger 2021-09-06 1498 u64 link_freq = hi846_get_link_freq(hi846);
e8c0882685f915 Martin Kepplinger 2021-09-06 1499
e8c0882685f915 Martin Kepplinger 2021-09-06 1500 dev_dbg(&client->dev, "%s: link freq: %llu\n", __func__,
e8c0882685f915 Martin Kepplinger 2021-09-06 1501 hi846_get_link_freq(hi846));
e8c0882685f915 Martin Kepplinger 2021-09-06 1502
e8c0882685f915 Martin Kepplinger 2021-09-06 1503 do_div(link_freq, fps);
e8c0882685f915 Martin Kepplinger 2021-09-06 1504 frame_length = link_freq;
e8c0882685f915 Martin Kepplinger 2021-09-06 1505 do_div(frame_length, HI846_LINE_LENGTH);
e8c0882685f915 Martin Kepplinger 2021-09-06 1506
e8c0882685f915 Martin Kepplinger 2021-09-06 1507 dummy_lines = (frame_length > hi846->cur_mode->frame_len) ?
e8c0882685f915 Martin Kepplinger 2021-09-06 1508 (frame_length - hi846->cur_mode->frame_len) : 0;
e8c0882685f915 Martin Kepplinger 2021-09-06 1509
e8c0882685f915 Martin Kepplinger 2021-09-06 1510 frame_length = hi846->cur_mode->frame_len + dummy_lines;
e8c0882685f915 Martin Kepplinger 2021-09-06 1511
e8c0882685f915 Martin Kepplinger 2021-09-06 1512 dev_dbg(&client->dev, "%s: frame length calculated: %llu\n", __func__,
e8c0882685f915 Martin Kepplinger 2021-09-06 1513 frame_length);
e8c0882685f915 Martin Kepplinger 2021-09-06 1514
e8c0882685f915 Martin Kepplinger 2021-09-06 1515 hi846_write_reg_16(hi846, HI846_REG_FLL, frame_length & 0xFFFF, &ret);
e8c0882685f915 Martin Kepplinger 2021-09-06 1516 hi846_write_reg_16(hi846, HI846_REG_LLP,
e8c0882685f915 Martin Kepplinger 2021-09-06 1517 HI846_LINE_LENGTH & 0xFFFF, &ret);
e8c0882685f915 Martin Kepplinger 2021-09-06 1518
e8c0882685f915 Martin Kepplinger 2021-09-06 1519 return ret;
e8c0882685f915 Martin Kepplinger 2021-09-06 1520 }
e8c0882685f915 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:[~2022-03-18 18:16 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-18 18:16 kernel test robot [this message]
-- strict thread matches above, loose matches on Subject: below --
2022-03-16 14:14 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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