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Date: Fri, 4 Nov 2022 07:05:46 +0800
From: kernel test robot <lkp@...el.com>
To: Sudheer Mogilappagari <sudheer.mogilappagari@...el.com>,
netdev@...r.kernel.org
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
kuba@...nel.org, corbet@....net, mkubecek@...e.cz,
sridhar.samudrala@...el.com, anthony.l.nguyen@...el.com
Subject: Re: [PATCH net-next] ethtool: add netlink based get rxfh support
Hi Sudheer,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on net-next/master]
url: https://github.com/intel-lab-lkp/linux/commits/Sudheer-Mogilappagari/ethtool-add-netlink-based-get-rxfh-support/20221104-051829
patch link: https://lore.kernel.org/r/20221103211419.2615321-1-sudheer.mogilappagari%40intel.com
patch subject: [PATCH net-next] ethtool: add netlink based get rxfh support
config: riscv-randconfig-r005-20221102
compiler: clang version 15.0.4 (https://github.com/llvm/llvm-project 5c68a1cb123161b54b72ce90e7975d95a8eaf2a4)
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-riscv-linux-gnu
# https://github.com/intel-lab-lkp/linux/commit/0ac74264773782495c9a77b0696c676f3a406a3b
git remote add linux-review https://github.com/intel-lab-lkp/linux
git fetch --no-tags linux-review Sudheer-Mogilappagari/ethtool-add-netlink-based-get-rxfh-support/20221104-051829
git checkout 0ac74264773782495c9a77b0696c676f3a406a3b
# 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=riscv SHELL=/bin/bash net/ethtool/
If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@...el.com>
All warnings (new ones prefixed by >>):
>> net/ethtool/rxfh.c:65:6: warning: variable 'hkey_size' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized]
if (ops->get_rxfh_key_size)
^~~~~~~~~~~~~~~~~~~~~~
net/ethtool/rxfh.c:69:29: note: uninitialized use occurs here
total_size = indir_bytes + hkey_size;
^~~~~~~~~
net/ethtool/rxfh.c:65:2: note: remove the 'if' if its condition is always true
if (ops->get_rxfh_key_size)
^~~~~~~~~~~~~~~~~~~~~~~~~~~
net/ethtool/rxfh.c:29:27: note: initialize the variable 'hkey_size' to silence this warning
u32 indir_size, hkey_size, total_size, indir_bytes;
^
= 0
>> net/ethtool/rxfh.c:63:6: warning: variable 'indir_size' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized]
if (ops->get_rxfh_indir_size)
^~~~~~~~~~~~~~~~~~~~~~~~
net/ethtool/rxfh.c:68:16: note: uninitialized use occurs here
indir_bytes = indir_size * sizeof(rxfh->rss_config[0]);
^~~~~~~~~~
net/ethtool/rxfh.c:63:2: note: remove the 'if' if its condition is always true
if (ops->get_rxfh_indir_size)
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
net/ethtool/rxfh.c:29:16: note: initialize the variable 'indir_size' to silence this warning
u32 indir_size, hkey_size, total_size, indir_bytes;
^
= 0
2 warnings generated.
vim +65 net/ethtool/rxfh.c
23
24 static int rxfh_prepare_data(const struct ethnl_req_info *req_base,
25 struct ethnl_reply_data *reply_base,
26 struct genl_info *info)
27 {
28 struct rxfh_reply_data *data = RXFH_REPDATA(reply_base);
29 u32 indir_size, hkey_size, total_size, indir_bytes;
30 struct net_device *dev = reply_base->dev;
31 struct ethtool_rxfh *rxfh = &data->rxfh;
32 struct ethnl_req_info req_info = {};
33 struct nlattr **tb = info->attrs;
34 const struct ethtool_ops *ops;
35 bool mod = false;
36 u8 dev_hfunc = 0;
37 u8 *hkey = NULL;
38 u8 *rss_config;
39 int ret;
40
41 ops = dev->ethtool_ops;
42 if (!ops->get_rxfh)
43 return -EOPNOTSUPP;
44
45 ret = ethnl_parse_header_dev_get(&req_info,
46 tb[ETHTOOL_A_RXFH_HEADER],
47 genl_info_net(info), info->extack,
48 true);
49 if (ret < 0)
50 return ret;
51
52 ethnl_update_u32(&rxfh->rss_context, tb[ETHTOOL_A_RXFH_RSS_CONTEXT],
53 &mod);
54
55 ret = ethnl_ops_begin(dev);
56 if (ret < 0)
57 return ret;
58
59 /* Some drivers don't handle rss_context */
60 if (rxfh->rss_context && !ops->get_rxfh_context)
61 return -EOPNOTSUPP;
62
> 63 if (ops->get_rxfh_indir_size)
64 indir_size = ops->get_rxfh_indir_size(dev);
> 65 if (ops->get_rxfh_key_size)
66 hkey_size = ops->get_rxfh_key_size(dev);
67
68 indir_bytes = indir_size * sizeof(rxfh->rss_config[0]);
69 total_size = indir_bytes + hkey_size;
70 rss_config = kzalloc(total_size, GFP_USER);
71 if (!rss_config)
72 return -ENOMEM;
73
74 if (indir_size) {
75 data->rss_config = (u32 *)rss_config;
76 rxfh->indir_size = indir_size;
77 }
78
79 if (hkey_size) {
80 hkey = rss_config + indir_bytes;
81 rxfh->key_size = hkey_size;
82 }
83
84 if (rxfh->rss_context)
85 ret = ops->get_rxfh_context(dev, data->rss_config, hkey,
86 &dev_hfunc, rxfh->rss_context);
87 else
88 ret = ops->get_rxfh(dev, data->rss_config, hkey, &dev_hfunc);
89
90 rxfh->hfunc = dev_hfunc;
91
92 ethnl_ops_complete(dev);
93 ethnl_parse_header_dev_put(&req_info);
94 return ret;
95 }
96
--
0-DAY CI Kernel Test Service
https://01.org/lkp
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