Re: [PATCH v3 03/34] component: Introduce the aggregate bus_type
From: kernel test robot
Date: Tue Oct 26 2021 - 00:41:27 EST
Hi Stephen,
I love your patch! Perhaps something to improve:
[auto build test WARNING on e4e737bb5c170df6135a127739a9e6148ee3da82]
url: https://github.com/0day-ci/linux/commits/Stephen-Boyd/component-Make-into-an-aggregate-bus/20211026-080422
base: e4e737bb5c170df6135a127739a9e6148ee3da82
config: ia64-defconfig (attached as .config)
compiler: ia64-linux-gcc (GCC) 11.2.0
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://github.com/0day-ci/linux/commit/748369f5c5e62a44653d9b76cdbdadc835dd54d2
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Stephen-Boyd/component-Make-into-an-aggregate-bus/20211026-080422
git checkout 748369f5c5e62a44653d9b76cdbdadc835dd54d2
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=ia64
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/base/component.c: In function '__component_add':
>> drivers/base/component.c:858:13: warning: variable 'ret' set but not used [-Wunused-but-set-variable]
858 | int ret;
| ^~~
vim +/ret +858 drivers/base/component.c
2a41e6070dd7ef Russell King 2014-01-10 853
3521ee994bca90 Daniel Vetter 2019-02-08 854 static int __component_add(struct device *dev, const struct component_ops *ops,
3521ee994bca90 Daniel Vetter 2019-02-08 855 int subcomponent)
2a41e6070dd7ef Russell King 2014-01-10 856 {
2a41e6070dd7ef Russell King 2014-01-10 857 struct component *component;
2a41e6070dd7ef Russell King 2014-01-10 @858 int ret;
2a41e6070dd7ef Russell King 2014-01-10 859
2a41e6070dd7ef Russell King 2014-01-10 860 component = kzalloc(sizeof(*component), GFP_KERNEL);
2a41e6070dd7ef Russell King 2014-01-10 861 if (!component)
2a41e6070dd7ef Russell King 2014-01-10 862 return -ENOMEM;
2a41e6070dd7ef Russell King 2014-01-10 863
2a41e6070dd7ef Russell King 2014-01-10 864 component->ops = ops;
2a41e6070dd7ef Russell King 2014-01-10 865 component->dev = dev;
3521ee994bca90 Daniel Vetter 2019-02-08 866 component->subcomponent = subcomponent;
2a41e6070dd7ef Russell King 2014-01-10 867
2a41e6070dd7ef Russell King 2014-01-10 868 dev_dbg(dev, "adding component (ops %ps)\n", ops);
2a41e6070dd7ef Russell King 2014-01-10 869
2a41e6070dd7ef Russell King 2014-01-10 870 mutex_lock(&component_mutex);
2a41e6070dd7ef Russell King 2014-01-10 871 list_add_tail(&component->node, &component_list);
2a41e6070dd7ef Russell King 2014-01-10 872 mutex_unlock(&component_mutex);
2a41e6070dd7ef Russell King 2014-01-10 873
748369f5c5e62a Stephen Boyd 2021-10-25 874 /*
748369f5c5e62a Stephen Boyd 2021-10-25 875 * Try to bind.
748369f5c5e62a Stephen Boyd 2021-10-25 876 *
748369f5c5e62a Stephen Boyd 2021-10-25 877 * Note: we don't check the return value here because component devices
748369f5c5e62a Stephen Boyd 2021-10-25 878 * don't care that the aggregate device can actually probe or not. They
748369f5c5e62a Stephen Boyd 2021-10-25 879 * only care about adding themselves to the component_list and then
748369f5c5e62a Stephen Boyd 2021-10-25 880 * waiting for their component_ops::bind_component callback to be
748369f5c5e62a Stephen Boyd 2021-10-25 881 * called.
748369f5c5e62a Stephen Boyd 2021-10-25 882 */
748369f5c5e62a Stephen Boyd 2021-10-25 883 ret = bus_rescan_devices(&aggregate_bus_type);
748369f5c5e62a Stephen Boyd 2021-10-25 884
748369f5c5e62a Stephen Boyd 2021-10-25 885 return 0;
2a41e6070dd7ef Russell King 2014-01-10 886 }
3521ee994bca90 Daniel Vetter 2019-02-08 887
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0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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