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Message-ID: <202011100604.lLSZLqqD-lkp@intel.com>
Date: Tue, 10 Nov 2020 06:11:08 +0800
From: kernel test robot <lkp@...el.com>
To: Krzysztof Kozlowski <krzk@...nel.org>
Cc: kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
Wolfram Sang <wsa-dev@...g-engineering.com>
Subject: drivers/i2c/busses/i2c-mlxcpld.c:271:10: warning: 'val' is used
uninitialized in this function
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 3552c3709c0e78144c11748718180441ac647ece
commit: 4a2d5f663dab6614772d8e28ca190b127ba46d9d i2c: Enable compile testing for more drivers
date: 10 months ago
config: sh-randconfig-s032-20201109 (attached as .config)
compiler: sh4-linux-gcc (GCC) 9.3.0
reproduce:
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# apt-get install sparse
# sparse version: v0.6.3-76-gf680124b-dirty
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4a2d5f663dab6614772d8e28ca190b127ba46d9d
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 4a2d5f663dab6614772d8e28ca190b127ba46d9d
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=sh
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>
All warnings (new ones prefixed by >>):
drivers/i2c/busses/i2c-mlxcpld.c: In function 'mlxcpld_i2c_check_busy':
>> drivers/i2c/busses/i2c-mlxcpld.c:271:10: warning: 'val' is used uninitialized in this function [-Wuninitialized]
271 | if (val & MLXCPLD_LPCI2C_TRANS_END)
| ^
vim +/val +271 drivers/i2c/busses/i2c-mlxcpld.c
6bec23bff914915 Vadim Pasternak 2016-11-20 263
6bec23bff914915 Vadim Pasternak 2016-11-20 264 /* Make sure the CPLD is ready to start transmitting. */
6bec23bff914915 Vadim Pasternak 2016-11-20 265 static int mlxcpld_i2c_check_busy(struct mlxcpld_i2c_priv *priv)
6bec23bff914915 Vadim Pasternak 2016-11-20 266 {
6bec23bff914915 Vadim Pasternak 2016-11-20 267 u8 val;
6bec23bff914915 Vadim Pasternak 2016-11-20 268
6bec23bff914915 Vadim Pasternak 2016-11-20 269 mlxcpld_i2c_read_comm(priv, MLXCPLD_LPCI2C_STATUS_REG, &val, 1);
6bec23bff914915 Vadim Pasternak 2016-11-20 270
6bec23bff914915 Vadim Pasternak 2016-11-20 @271 if (val & MLXCPLD_LPCI2C_TRANS_END)
6bec23bff914915 Vadim Pasternak 2016-11-20 272 return 0;
6bec23bff914915 Vadim Pasternak 2016-11-20 273
6bec23bff914915 Vadim Pasternak 2016-11-20 274 return -EIO;
6bec23bff914915 Vadim Pasternak 2016-11-20 275 }
6bec23bff914915 Vadim Pasternak 2016-11-20 276
:::::: The code at line 271 was first introduced by commit
:::::: 6bec23bff914915822f2c34d0555902fb2b9be1f i2c: mlxcpld: add master driver for mellanox systems
:::::: TO: Vadim Pasternak <vadimp@...lanox.com>
:::::: CC: Wolfram Sang <wsa@...-dreams.de>
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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