Re: [PATCH v1 2/2] smsc9420: use generic power management
From: Vaibhav Gupta
Date: Thu Jul 02 2020 - 23:05:37 EST
On Fri, 3 Jul 2020 at 01:38, kernel test robot <lkp@xxxxxxxxx> wrote:
>
> Hi Vaibhav,
>
> Thank you for the patch! Perhaps something to improve:
>
> [auto build test WARNING on linus/master]
> [also build test WARNING on v5.8-rc3 next-20200702]
> [If your patch is applied to the wrong git tree, kindly drop us a note.
> And when submitting patch, we suggest to use as documented in
> https://git-scm.com/docs/git-format-patch]
>
> url: https://github.com/0day-ci/linux/commits/Vaibhav-Gupta/smsc-use-generic-power-management/20200702-185914
> base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git cd77006e01b3198c75fb7819b3d0ff89709539bb
> config: x86_64-allyesconfig (attached as .config)
> compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project 003a086ffc0d1affbb8300b36225fb8150a2d40a)
> 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
> # save the attached .config to linux build tree
> COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64
>
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@xxxxxxxxx>
>
> All warnings (new ones prefixed by >>):
>
> >> drivers/net/ethernet/smsc/smsc9420.c:1466:6: warning: variable 'err' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized]
> if (netif_running(dev)) {
> ^~~~~~~~~~~~~~~~~~
> drivers/net/ethernet/smsc/smsc9420.c:1471:9: note: uninitialized use occurs here
> return err;
> ^~~
> drivers/net/ethernet/smsc/smsc9420.c:1466:2: note: remove the 'if' if its condition is always true
> if (netif_running(dev)) {
> ^~~~~~~~~~~~~~~~~~~~~~~~
> drivers/net/ethernet/smsc/smsc9420.c:1460:9: note: initialize the variable 'err' to silence this warning
> int err;
> ^
> = 0
> 1 warning generated.
>
> vim +1466 drivers/net/ethernet/smsc/smsc9420.c
>
> 2cb377283f3469 drivers/net/smsc9420.c Steve Glendinning 2008-12-11 1456
> 7d465053ec82e2 drivers/net/ethernet/smsc/smsc9420.c Vaibhav Gupta 2020-07-02 1457 static int __maybe_unused smsc9420_resume(struct device *dev_d)
> 2cb377283f3469 drivers/net/smsc9420.c Steve Glendinning 2008-12-11 1458 {
> 7d465053ec82e2 drivers/net/ethernet/smsc/smsc9420.c Vaibhav Gupta 2020-07-02 1459 struct net_device *dev = dev_get_drvdata(dev_d);
> 2cb377283f3469 drivers/net/smsc9420.c Steve Glendinning 2008-12-11 1460 int err;
> 2cb377283f3469 drivers/net/smsc9420.c Steve Glendinning 2008-12-11 1461
> 7d465053ec82e2 drivers/net/ethernet/smsc/smsc9420.c Vaibhav Gupta 2020-07-02 1462 pci_set_master(to_pci_dev(dev_d));
> 2cb377283f3469 drivers/net/smsc9420.c Steve Glendinning 2008-12-11 1463
> 7d465053ec82e2 drivers/net/ethernet/smsc/smsc9420.c Vaibhav Gupta 2020-07-02 1464 device_wakeup_disable(dev_d);
> 2cb377283f3469 drivers/net/smsc9420.c Steve Glendinning 2008-12-11 1465
> 2cb377283f3469 drivers/net/smsc9420.c Steve Glendinning 2008-12-11 @1466 if (netif_running(dev)) {
> b5a80837b7e125 drivers/net/ethernet/smsc/smsc9420.c Francois Romieu 2012-03-09 1467 /* FIXME: gross. It looks like ancient PM relic.*/
> 2cb377283f3469 drivers/net/smsc9420.c Steve Glendinning 2008-12-11 1468 err = smsc9420_open(dev);
> 2cb377283f3469 drivers/net/smsc9420.c Steve Glendinning 2008-12-11 1469 netif_device_attach(dev);
> 2cb377283f3469 drivers/net/smsc9420.c Steve Glendinning 2008-12-11 1470 }
> 2cb377283f3469 drivers/net/smsc9420.c Steve Glendinning 2008-12-11 1471 return err;
> 2cb377283f3469 drivers/net/smsc9420.c Steve Glendinning 2008-12-11 1472 }
> 2cb377283f3469 drivers/net/smsc9420.c Steve Glendinning 2008-12-11 1473
>
> ---
> 0-DAY CI Kernel Test Service, Intel Corporation
> https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
Fixed. Thanks!
-- Vaibhav Gupta