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SubjectRe: [PATCH v3 4/5] fpga manager: xilinx-spi: add error checking after gpiod_get_value()
Hi Luca,

I love your patch! Perhaps something to improve:

[auto build test WARNING on v5.9-rc2]
[also build test WARNING on next-20200828]
[cannot apply to xlnx/master]
[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]

url: https://github.com/0day-ci/linux/commits/Luca-Ceresoli/fpga-manager-xilinx-spi-remove-stray-comment/20200829-040041
base: d012a7190fc1fd72ed48911e77ca97ba4521bccd
compiler: nds32le-linux-gcc (GCC) 9.3.0

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>


cppcheck warnings: (new ones prefixed by >>)

>> drivers/fpga/xilinx-spi.c:183:10: warning: Uninitialized variable: expired [uninitvar]
while (!expired) {
^

# https://github.com/0day-ci/linux/commit/5ae295c0b82631de73665c58df85ec3ed8567a8e
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Luca-Ceresoli/fpga-manager-xilinx-spi-remove-stray-comment/20200829-040041
git checkout 5ae295c0b82631de73665c58df85ec3ed8567a8e
vim +183 drivers/fpga/xilinx-spi.c

061c97d13f1a69 Anatolij Gustschin 2017-03-23 168
061c97d13f1a69 Anatolij Gustschin 2017-03-23 169 static int xilinx_spi_write_complete(struct fpga_manager *mgr,
061c97d13f1a69 Anatolij Gustschin 2017-03-23 170 struct fpga_image_info *info)
061c97d13f1a69 Anatolij Gustschin 2017-03-23 171 {
061c97d13f1a69 Anatolij Gustschin 2017-03-23 172 struct xilinx_spi_conf *conf = mgr->priv;
629463d1acc532 Luca Ceresoli 2020-08-28 173 unsigned long timeout = jiffies + usecs_to_jiffies(info->config_complete_timeout_us);
629463d1acc532 Luca Ceresoli 2020-08-28 174 bool expired;
629463d1acc532 Luca Ceresoli 2020-08-28 175 int done;
061c97d13f1a69 Anatolij Gustschin 2017-03-23 176 int ret;
061c97d13f1a69 Anatolij Gustschin 2017-03-23 177
629463d1acc532 Luca Ceresoli 2020-08-28 178 /*
629463d1acc532 Luca Ceresoli 2020-08-28 179 * This loop is carefully written such that if the driver is
629463d1acc532 Luca Ceresoli 2020-08-28 180 * scheduled out for more than 'timeout', we still check for DONE
629463d1acc532 Luca Ceresoli 2020-08-28 181 * before giving up and we apply 8 extra CCLK cycles in all cases.
629463d1acc532 Luca Ceresoli 2020-08-28 182 */
629463d1acc532 Luca Ceresoli 2020-08-28 @183 while (!expired) {
629463d1acc532 Luca Ceresoli 2020-08-28 184 expired = time_after(jiffies, timeout);
061c97d13f1a69 Anatolij Gustschin 2017-03-23 185
629463d1acc532 Luca Ceresoli 2020-08-28 186 done = get_done_gpio(mgr);
629463d1acc532 Luca Ceresoli 2020-08-28 187 if (done < 0)
629463d1acc532 Luca Ceresoli 2020-08-28 188 return done;
061c97d13f1a69 Anatolij Gustschin 2017-03-23 189
061c97d13f1a69 Anatolij Gustschin 2017-03-23 190 ret = xilinx_spi_apply_cclk_cycles(conf);
061c97d13f1a69 Anatolij Gustschin 2017-03-23 191 if (ret)
061c97d13f1a69 Anatolij Gustschin 2017-03-23 192 return ret;
061c97d13f1a69 Anatolij Gustschin 2017-03-23 193
629463d1acc532 Luca Ceresoli 2020-08-28 194 if (done)
629463d1acc532 Luca Ceresoli 2020-08-28 195 return 0;
061c97d13f1a69 Anatolij Gustschin 2017-03-23 196 }
061c97d13f1a69 Anatolij Gustschin 2017-03-23 197
70cac0e8c9ec83 Luca Ceresoli 2020-08-28 198 dev_err(&mgr->dev, "Timeout after config data transfer\n");
061c97d13f1a69 Anatolij Gustschin 2017-03-23 199 return -ETIMEDOUT;
061c97d13f1a69 Anatolij Gustschin 2017-03-23 200 }
061c97d13f1a69 Anatolij Gustschin 2017-03-23 201

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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