[superna9999:amlogic/v5.18/g12-dsi-wip 13/14] drivers/gpu/drm/meson/meson_encoder_dsi.c:122:69: warning: variable 'ret' is uninitialized when used here
From: kernel test robot
Date: Fri Jan 21 2022 - 13:51:19 EST
tree: https://github.com/superna9999/linux amlogic/v5.18/g12-dsi-wip
head: fbcc0a7f53880919dc415da44339313dd59768f0
commit: 69065af6f6c3f3c1a6a29ab765c02e8371be3a42 [13/14] drm/meson: add DSI encoder
config: arm64-allmodconfig (https://download.01.org/0day-ci/archive/20220122/202201220231.SSLn9QGA-lkp@xxxxxxxxx/config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 7b3d30728816403d1fd73cc5082e9fb761262bce)
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 arm64 cross compiling tool for clang build
# apt-get install binutils-aarch64-linux-gnu
# https://github.com/superna9999/linux/commit/69065af6f6c3f3c1a6a29ab765c02e8371be3a42
git remote add superna9999 https://github.com/superna9999/linux
git fetch --no-tags superna9999 amlogic/v5.18/g12-dsi-wip
git checkout 69065af6f6c3f3c1a6a29ab765c02e8371be3a42
# save the config file to linux build tree
mkdir build_dir
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm64 SHELL=/bin/bash drivers/gpu/drm/meson/
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/gpu/drm/meson/meson_encoder_dsi.c:122:69: warning: variable 'ret' is uninitialized when used here [-Wuninitialized]
dev_dbg(priv->dev, "Failed to find DSI transceiver bridge: %d\n", ret);
^~~
include/linux/dev_printk.h:155:39: note: expanded from macro 'dev_dbg'
dynamic_dev_dbg(dev, dev_fmt(fmt), ##__VA_ARGS__)
^~~~~~~~~~~
include/linux/dynamic_debug.h:167:19: note: expanded from macro 'dynamic_dev_dbg'
dev, fmt, ##__VA_ARGS__)
^~~~~~~~~~~
include/linux/dynamic_debug.h:152:56: note: expanded from macro '_dynamic_func_call'
__dynamic_func_call(__UNIQUE_ID(ddebug), fmt, func, ##__VA_ARGS__)
^~~~~~~~~~~
include/linux/dynamic_debug.h:134:15: note: expanded from macro '__dynamic_func_call'
func(&id, ##__VA_ARGS__); \
^~~~~~~~~~~
drivers/gpu/drm/meson/meson_encoder_dsi.c:107:9: note: initialize the variable 'ret' to silence this warning
int ret;
^
= 0
1 warning generated.
vim +/ret +122 drivers/gpu/drm/meson/meson_encoder_dsi.c
102
103 int meson_encoder_dsi_init(struct meson_drm *priv)
104 {
105 struct meson_encoder_dsi *meson_encoder_dsi;
106 struct device_node *remote;
107 int ret;
108
109 meson_encoder_dsi = devm_kzalloc(priv->dev, sizeof(*meson_encoder_dsi), GFP_KERNEL);
110 if (!meson_encoder_dsi)
111 return -ENOMEM;
112
113 /* DSI Transceiver Bridge */
114 remote = of_graph_get_remote_node(priv->dev->of_node, 2, 0);
115 if (!remote) {
116 dev_err(priv->dev, "DSI transceiver device is disabled");
117 return 0;
118 }
119
120 meson_encoder_dsi->next_bridge = of_drm_find_bridge(remote);
121 if (!meson_encoder_dsi->next_bridge) {
> 122 dev_dbg(priv->dev, "Failed to find DSI transceiver bridge: %d\n", ret);
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx