Re: [PATCH v7 5/6] media: starfive: camss: Add ISP driver

kernel test robot
2023-06-22T03:30:39Z

Hi Jack,

kernel test robot noticed the following build warnings:

[auto build test WARNING on media-tree/master]
[also build test WARNING on robh/for-next linus/master v6.4-rc7 next-20230621]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url: https://github.com/intel-lab-lkp/linux/commits/Jack-Zhu/media-dt-bindings-Add-JH7110-Camera-Subsystem/20230619-193105
base: git://linuxtv.org/media_tree.git master
patch link: https://lore.kernel.org/r/20230619112838.19797-6-jack.zhu%40starfivetech.com
patch subject: [PATCH v7 5/6] media: starfive: camss: Add ISP driver
config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20230622/202306221112.MnLtMzRo-lkp@intel.com/config)
compiler: clang version 15.0.7 (https://github.com/llvm/llvm-project.git 8dfdcc7b7bf66834a761bd8de445840ef68e4d1a)
reproduce: (https://download.01.org/0day-ci/archive/20230622/202306221112.MnLtMzRo-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202306221112.MnLtMzRo-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/media/platform/starfive/camss/stf_camss.c:173:13: warning: variable 'pad_num' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized]
} else if (port == STF_PORT_DVP) {
^~~~~~~~~~~~~~~~~~~~
drivers/media/platform/starfive/camss/stf_camss.c:178:18: note: uninitialized use occurs here
for (i = 0; i < pad_num; ++i) {
^~~~~~~
drivers/media/platform/starfive/camss/stf_camss.c:173:9: note: remove the 'if' if its condition is always true
} else if (port == STF_PORT_DVP) {
^~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/media/platform/starfive/camss/stf_camss.c:168:25: note: initialize the variable 'pad_num' to silence this warning
unsigned int i, pad_num;
^
= 0
1 warning generated.
--
>> drivers/media/platform/starfive/camss/stf_isp.c:113:13: warning: variable 'formats' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized]
} else if (pad == STF_ISP_PAD_SRC) {
^~~~~~~~~~~~~~~~~~~~~~
drivers/media/platform/starfive/camss/stf_isp.c:127:18: note: uninitialized use occurs here
for (i = 0; i < formats->nfmts; i++) {
^~~~~~~
drivers/media/platform/starfive/camss/stf_isp.c:113:9: note: remove the 'if' if its condition is always true
} else if (pad == STF_ISP_PAD_SRC) {
^~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/media/platform/starfive/camss/stf_isp.c:105:40: note: initialize the variable 'formats' to silence this warning
const struct isp_format_table *formats;
^
= NULL
1 warning generated.

vim +173 drivers/media/platform/starfive/camss/stf_camss.c

156
157 static int stfcamss_subdev_notifier_bound(struct v4l2_async_notifier *async,
158 struct v4l2_subdev *subdev,
159 struct v4l2_async_subdev *asd)
160 {
161 struct stfcamss *stfcamss =
162 container_of(async, struct stfcamss, notifier);
163 struct stfcamss_async_subdev *csd =
164 container_of(asd, struct stfcamss_async_subdev, asd);
165 enum stf_port_num port = csd->port;
166 struct stf_isp_dev *isp_dev = &stfcamss->isp_dev;
167 struct media_pad *pad[STF_PADS_NUM];
168 unsigned int i, pad_num;
169
170 if (port == STF_PORT_CSI2RX) {
171 pad[0] = &isp_dev->pads[STF_PAD_SINK];
172 pad_num = 1;
> 173 } else if (port == STF_PORT_DVP) {
174 dev_err(stfcamss->dev, "Not support DVP sensor\n");
175 return -EPERM;
176 }
177
178 for (i = 0; i < pad_num; ++i) {
179 int ret;
180
181 ret = v4l2_create_fwnode_links_to_pad(subdev, pad[i], 0);
182 if (ret < 0)
183 return ret;
184 }
185
186 return 0;
187 }
188

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