[staging:staging-testing 54/54] drivers/staging/r8188eu/core/rtw_pwrctrl.c:400:6: warning: variable 'ret' is used uninitialized whenever 'if' condition is false
From: kernel test robot
Date: Sat Jul 30 2022 - 04:16:04 EST
tree: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git staging-testing
head: f3a76018dd55d8ddcd28cb47049f46ae5c0ce557
commit: f3a76018dd55d8ddcd28cb47049f46ae5c0ce557 [54/54] staging: r8188eu: remove initializer from ret in rtw_pwr_wakeup
config: hexagon-randconfig-r015-20220729 (https://download.01.org/0day-ci/archive/20220730/202207301623.BfMKLfhv-lkp@xxxxxxxxx/config)
compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 52cd00cabf479aa7eb6dbb063b7ba41ea57bce9e)
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/gregkh/staging.git/commit/?id=f3a76018dd55d8ddcd28cb47049f46ae5c0ce557
git remote add staging https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git
git fetch --no-tags staging staging-testing
git checkout f3a76018dd55d8ddcd28cb47049f46ae5c0ce557
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash drivers/staging/r8188eu/
If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@xxxxxxxxx>
All warnings (new ones prefixed by >>):
>> drivers/staging/r8188eu/core/rtw_pwrctrl.c:400:6: warning: variable 'ret' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized]
if (padapter->bDriverStopped || !padapter->bup || !padapter->hw_init_completed) {
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/staging/r8188eu/core/rtw_pwrctrl.c:409:9: note: uninitialized use occurs here
return ret;
^~~
drivers/staging/r8188eu/core/rtw_pwrctrl.c:400:2: note: remove the 'if' if its condition is always true
if (padapter->bDriverStopped || !padapter->bup || !padapter->hw_init_completed) {
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/staging/r8188eu/core/rtw_pwrctrl.c:384:9: note: initialize the variable 'ret' to silence this warning
int ret;
^
= 0
1 warning generated.
vim +400 drivers/staging/r8188eu/core/rtw_pwrctrl.c
15865124feed88 Phillip Potter 2021-07-28 376
57c27d38ff9379 Michael Straube 2022-04-03 377 /* Wake the NIC up from: 1)IPS 2)USB autosuspend */
719cf66c8a2b06 Michael Straube 2022-04-03 378 int rtw_pwr_wakeup(struct adapter *padapter)
15865124feed88 Phillip Potter 2021-07-28 379 {
15865124feed88 Phillip Potter 2021-07-28 380 struct pwrctrl_priv *pwrpriv = &padapter->pwrctrlpriv;
15865124feed88 Phillip Potter 2021-07-28 381 struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
3b9d0da6aa08a3 Martin Kaiser 2022-04-13 382 unsigned long timeout = jiffies + msecs_to_jiffies(3000);
1dd0ac70494c1d Martin Kaiser 2022-04-13 383 unsigned long deny_time;
f3a76018dd55d8 Phillip Potter 2022-07-29 384 int ret;
15865124feed88 Phillip Potter 2021-07-28 385
3b9d0da6aa08a3 Martin Kaiser 2022-04-13 386 while (pwrpriv->ps_processing && time_before(jiffies, timeout))
d21edee5a4276b Larry Finger 2021-08-05 387 msleep(10);
15865124feed88 Phillip Potter 2021-07-28 388
15865124feed88 Phillip Potter 2021-07-28 389 /* I think this should be check in IPS, LPS, autosuspend functions... */
15865124feed88 Phillip Potter 2021-07-28 390 if (check_fwstate(pmlmepriv, _FW_LINKED)) {
2b5002e2cc1483 Phillip Potter 2022-07-25 391 ret = 0;
15865124feed88 Phillip Potter 2021-07-28 392 goto exit;
15865124feed88 Phillip Potter 2021-07-28 393 }
294e69c69c4d4a Martin Kaiser 2022-04-13 394
294e69c69c4d4a Martin Kaiser 2022-04-13 395 if (pwrpriv->rf_pwrstate == rf_off && ips_leave(padapter) == _FAIL) {
2b5002e2cc1483 Phillip Potter 2022-07-25 396 ret = -ENOMEM;
15865124feed88 Phillip Potter 2021-07-28 397 goto exit;
15865124feed88 Phillip Potter 2021-07-28 398 }
15865124feed88 Phillip Potter 2021-07-28 399
a9f136fa7e67fd Martin Kaiser 2022-04-13 @400 if (padapter->bDriverStopped || !padapter->bup || !padapter->hw_init_completed) {
2b5002e2cc1483 Phillip Potter 2022-07-25 401 ret = -EBUSY;
15865124feed88 Phillip Potter 2021-07-28 402 goto exit;
15865124feed88 Phillip Potter 2021-07-28 403 }
15865124feed88 Phillip Potter 2021-07-28 404
15865124feed88 Phillip Potter 2021-07-28 405 exit:
1dd0ac70494c1d Martin Kaiser 2022-04-13 406 deny_time = jiffies + msecs_to_jiffies(RTW_PWR_STATE_CHK_INTERVAL);
1dd0ac70494c1d Martin Kaiser 2022-04-13 407 if (time_before(pwrpriv->ips_deny_time, deny_time))
1dd0ac70494c1d Martin Kaiser 2022-04-13 408 pwrpriv->ips_deny_time = deny_time;
15865124feed88 Phillip Potter 2021-07-28 409 return ret;
15865124feed88 Phillip Potter 2021-07-28 410 }
15865124feed88 Phillip Potter 2021-07-28 411
:::::: The code at line 400 was first introduced by commit
:::::: a9f136fa7e67fdef97ad6c4be5f04f60ad78b5f3 staging: r8188eu: make return values consistent
:::::: TO: Martin Kaiser <martin@xxxxxxxxx>
:::::: CC: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
--
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