From: kernel test robot <lkp@intel.com>
To: kbuild@lists.01.org
Subject: drivers/leds/flash/leds-mt6360.c:339:13: warning: use of uninitialized value '<unknown>' [CWE-457]
Date: Mon, 25 Jul 2022 16:37:46 +0800 [thread overview]
Message-ID: <202207251615.G7DbbDZh-lkp@intel.com> (raw)
[-- Attachment #1: Type: text/plain, Size: 10606 bytes --]
::::::
:::::: Manual check reason: "low confidence bisect report"
:::::: Manual check reason: "low confidence static check warning: drivers/leds/flash/leds-mt6360.c:339:13: warning: use of uninitialized value '<unknown>' [CWE-457] [-Wanalyzer-use-of-uninitialized-value]"
::::::
CC: kbuild-all(a)lists.01.org
BCC: lkp(a)intel.com
CC: linux-kernel(a)vger.kernel.org
TO: Gene Chen <gene_chen@richtek.com>
CC: Pavel Machek <pavel@ucw.cz>
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: e0dccc3b76fb35bb257b4118367a883073d7390e
commit: 679f8652064bfa2f622c7b2bab86b1bf3207d6bc leds: Add mt6360 driver
date: 6 months ago
:::::: branch date: 12 hours ago
:::::: commit date: 6 months ago
config: arm-randconfig-c002-20220718 (https://download.01.org/0day-ci/archive/20220725/202207251615.G7DbbDZh-lkp(a)intel.com/config)
compiler: arm-linux-gnueabi-gcc (GCC) 12.1.0
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
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=679f8652064bfa2f622c7b2bab86b1bf3207d6bc
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 679f8652064bfa2f622c7b2bab86b1bf3207d6bc
# save the config file
ARCH=arm KBUILD_USERCFLAGS='-fanalyzer -Wno-error'
If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@intel.com>
gcc-analyzer warnings: (new ones prefixed by >>)
drivers/leds/flash/leds-mt6360.c: In function 'mt6360_fault_get':
>> drivers/leds/flash/leds-mt6360.c:339:13: warning: use of uninitialized value '<unknown>' [CWE-457] [-Wanalyzer-use-of-uninitialized-value]
339 | u16 fled_stat;
| ^~~~~~~~~
'mt6360_fault_get': event 1
|
| 339 | u16 fled_stat;
| | ^~~~~~~~~
| | |
| | (1) use of uninitialized value '<unknown>' here
|
drivers/leds/flash/leds-mt6360.c:340:22: warning: use of uninitialized value '<unknown>' [CWE-457] [-Wanalyzer-use-of-uninitialized-value]
340 | unsigned int chg_stat, strobe_timeout_mask, fled_short_mask;
| ^~~~~~~~
'mt6360_fault_get': event 1
|
| 340 | unsigned int chg_stat, strobe_timeout_mask, fled_short_mask;
| | ^~~~~~~~
| | |
| | (1) use of uninitialized value '<unknown>' here
|
drivers/leds/flash/leds-mt6360.c: In function 'mt6360_isnk_init_default_state':
drivers/leds/flash/leds-mt6360.c:391:22: warning: use of uninitialized value '<unknown>' [CWE-457] [-Wanalyzer-use-of-uninitialized-value]
391 | unsigned int regval;
| ^~~~~~
'mt6360_isnk_init_default_state': event 1
|
| 391 | unsigned int regval;
| | ^~~~~~
| | |
| | (1) use of uninitialized value '<unknown>' here
|
drivers/leds/flash/leds-mt6360.c: In function 'mt6360_flash_init_default_state':
drivers/leds/flash/leds-mt6360.c:427:22: warning: use of uninitialized value '<unknown>' [CWE-457] [-Wanalyzer-use-of-uninitialized-value]
427 | unsigned int regval;
| ^~~~~~
'mt6360_flash_init_default_state': event 1
|
| 427 | unsigned int regval;
| | ^~~~~~
| | |
| | (1) use of uninitialized value '<unknown>' here
|
drivers/leds/flash/leds-mt6360.c: In function 'mt6360_init_isnk_properties':
drivers/leds/flash/leds-mt6360.c:624:13: warning: use of uninitialized value '<unknown>' [CWE-457] [-Wanalyzer-use-of-uninitialized-value]
624 | u32 val;
| ^~~
'mt6360_init_isnk_properties': event 1
|
| 624 | u32 val;
| | ^~~
| | |
| | (1) use of uninitialized value '<unknown>' here
|
drivers/leds/flash/leds-mt6360.c:636:29: warning: use of uninitialized value '<unknown>' [CWE-457] [-Wanalyzer-use-of-uninitialized-value]
636 | u32 reg, color;
| ^~~
'mt6360_init_isnk_properties': events 1-3
|
| 627 | if (led->led_no == MT6360_VIRTUAL_MULTICOLOR) {
| | ^
| | |
| | (1) following 'true' branch...
|......
| 630 | sub_led = devm_kzalloc(priv->dev,
| | ~~~~~~~~~~~~~~~~~~~~~~~
| | |
| | (2) ...to here
| 631 | sizeof(*sub_led) * MULTICOLOR_NUM_CHANNELS, GFP_KERNEL);
| | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| 632 | if (!sub_led)
| | ~
| | |
| | (3) following 'false' branch...
|
'mt6360_init_isnk_properties': event 4
|
| 635 | fwnode_for_each_child_node(init_data->fwnode, child) {
| | ~~~~~~~~~^~~~~~~~
| | |
| | (4) ...to here
include/linux/property.h:101:49: note: in definition of macro 'fwnode_for_each_child_node'
| 101 | for (child = fwnode_get_next_child_node(fwnode, NULL); child; \
| | ^~~~~~
|
'mt6360_init_isnk_properties': event 5
|
|drivers/leds/flash/leds-mt6360.c:635:63:
| 635 | fwnode_for_each_child_node(init_data->fwnode, child) {
| | ^~~~~
| | |
| | (5) following 'true' branch (when 'child' is non-NULL)...
include/linux/property.h:101:64: note: in definition of macro 'fwnode_for_each_child_node'
| 101 | for (child = fwnode_get_next_child_node(fwnode, NULL); child; \
| | ^~~~~
|
'mt6360_init_isnk_properties': events 6-7
|
|drivers/leds/flash/leds-mt6360.c:636:29:
| 636 | u32 reg, color;
| | ^~~
| | |
vim +339 drivers/leds/flash/leds-mt6360.c
679f8652064bfa Gene Chen 2021-11-15 333
679f8652064bfa Gene Chen 2021-11-15 334 static int mt6360_fault_get(struct led_classdev_flash *fl_cdev, u32 *fault)
679f8652064bfa Gene Chen 2021-11-15 335 {
679f8652064bfa Gene Chen 2021-11-15 336 struct mt6360_led *led =
679f8652064bfa Gene Chen 2021-11-15 337 container_of(fl_cdev, struct mt6360_led, flash);
679f8652064bfa Gene Chen 2021-11-15 338 struct mt6360_priv *priv = led->priv;
679f8652064bfa Gene Chen 2021-11-15 @339 u16 fled_stat;
679f8652064bfa Gene Chen 2021-11-15 340 unsigned int chg_stat, strobe_timeout_mask, fled_short_mask;
679f8652064bfa Gene Chen 2021-11-15 341 u32 rfault = 0;
679f8652064bfa Gene Chen 2021-11-15 342 int ret;
679f8652064bfa Gene Chen 2021-11-15 343
679f8652064bfa Gene Chen 2021-11-15 344 mutex_lock(&priv->lock);
679f8652064bfa Gene Chen 2021-11-15 345 ret = regmap_read(priv->regmap, MT6360_REG_CHGSTAT2, &chg_stat);
679f8652064bfa Gene Chen 2021-11-15 346 if (ret)
679f8652064bfa Gene Chen 2021-11-15 347 goto unlock;
679f8652064bfa Gene Chen 2021-11-15 348
679f8652064bfa Gene Chen 2021-11-15 349 ret = regmap_raw_read(priv->regmap, MT6360_REG_FLEDSTAT1, &fled_stat,
679f8652064bfa Gene Chen 2021-11-15 350 sizeof(fled_stat));
679f8652064bfa Gene Chen 2021-11-15 351 if (ret)
679f8652064bfa Gene Chen 2021-11-15 352 goto unlock;
679f8652064bfa Gene Chen 2021-11-15 353
679f8652064bfa Gene Chen 2021-11-15 354 if (led->led_no == MT6360_LED_FLASH1) {
679f8652064bfa Gene Chen 2021-11-15 355 strobe_timeout_mask = MT6360_FLED1STRBTO_MASK;
679f8652064bfa Gene Chen 2021-11-15 356 fled_short_mask = MT6360_FLED1SHORT_MASK;
679f8652064bfa Gene Chen 2021-11-15 357 } else {
679f8652064bfa Gene Chen 2021-11-15 358 strobe_timeout_mask = MT6360_FLED2STRBTO_MASK;
679f8652064bfa Gene Chen 2021-11-15 359 fled_short_mask = MT6360_FLED2SHORT_MASK;
679f8652064bfa Gene Chen 2021-11-15 360 }
679f8652064bfa Gene Chen 2021-11-15 361
679f8652064bfa Gene Chen 2021-11-15 362 if (chg_stat & MT6360_FLEDCHGVINOVP_MASK)
679f8652064bfa Gene Chen 2021-11-15 363 rfault |= LED_FAULT_INPUT_VOLTAGE;
679f8652064bfa Gene Chen 2021-11-15 364
679f8652064bfa Gene Chen 2021-11-15 365 if (fled_stat & strobe_timeout_mask)
679f8652064bfa Gene Chen 2021-11-15 366 rfault |= LED_FAULT_TIMEOUT;
679f8652064bfa Gene Chen 2021-11-15 367
679f8652064bfa Gene Chen 2021-11-15 368 if (fled_stat & fled_short_mask)
679f8652064bfa Gene Chen 2021-11-15 369 rfault |= LED_FAULT_SHORT_CIRCUIT;
679f8652064bfa Gene Chen 2021-11-15 370
679f8652064bfa Gene Chen 2021-11-15 371 if (fled_stat & MT6360_FLEDLVF_MASK)
679f8652064bfa Gene Chen 2021-11-15 372 rfault |= LED_FAULT_UNDER_VOLTAGE;
679f8652064bfa Gene Chen 2021-11-15 373
679f8652064bfa Gene Chen 2021-11-15 374 *fault = rfault;
679f8652064bfa Gene Chen 2021-11-15 375 unlock:
679f8652064bfa Gene Chen 2021-11-15 376 mutex_unlock(&priv->lock);
679f8652064bfa Gene Chen 2021-11-15 377 return ret;
679f8652064bfa Gene Chen 2021-11-15 378 }
679f8652064bfa Gene Chen 2021-11-15 379
--
0-DAY CI Kernel Test Service
https://01.org/lkp
next reply other threads:[~2022-07-25 8:37 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-25 8:37 kernel test robot [this message]
-- strict thread matches above, loose matches on Subject: below --
2022-07-20 8:27 drivers/leds/flash/leds-mt6360.c:339:13: warning: use of uninitialized value '<unknown>' [CWE-457] kernel test robot
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