Hi Mathieu, url: https://github.com/0day-ci/linux/commits/Mathieu-Poirier/rpmsg-Make-RPMSG-name-service-modular/20200922-081745 base: b10b8ad862118bf42c28a98b0f067619aadcfb23 config: i386-randconfig-m021-20200923 (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx> smatch warnings: drivers/rpmsg/rpmsg_core.c:33 rpmsg16_to_cpu() warn: signedness bug returning '(-22)' drivers/rpmsg/rpmsg_core.c:44 cpu_to_rpmsg16() warn: signedness bug returning '(-22)' # https://github.com/0day-ci/linux/commit/547ad00c50065bf914ac4090882d0ac692f5452d git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Mathieu-Poirier/rpmsg-Make-RPMSG-name-service-modular/20200922-081745 git checkout 547ad00c50065bf914ac4090882d0ac692f5452d vim +33 drivers/rpmsg/rpmsg_core.c 547ad00c50065bf Mathieu Poirier 2020-09-21 30 u16 rpmsg16_to_cpu(struct rpmsg_device *rpdev, u16 val) ^^^ 547ad00c50065bf Mathieu Poirier 2020-09-21 31 { 547ad00c50065bf Mathieu Poirier 2020-09-21 32 if (WARN_ON(!rpdev)) 547ad00c50065bf Mathieu Poirier 2020-09-21 @33 return -EINVAL; ^^^^^^^^^^^^^^ All the negative returns get truncated to a high u16 value. 547ad00c50065bf Mathieu Poirier 2020-09-21 34 if (!rpdev->ops || !rpdev->ops->transport16_to_cpu) 547ad00c50065bf Mathieu Poirier 2020-09-21 35 return -EPERM; ^^^^^^^^^^^^^^ 547ad00c50065bf Mathieu Poirier 2020-09-21 36 547ad00c50065bf Mathieu Poirier 2020-09-21 37 return rpdev->ops->transport16_to_cpu(rpdev, val); 547ad00c50065bf Mathieu Poirier 2020-09-21 38 } 547ad00c50065bf Mathieu Poirier 2020-09-21 39 EXPORT_SYMBOL(rpmsg16_to_cpu); 547ad00c50065bf Mathieu Poirier 2020-09-21 40 547ad00c50065bf Mathieu Poirier 2020-09-21 41 u16 cpu_to_rpmsg16(struct rpmsg_device *rpdev, u16 val) 547ad00c50065bf Mathieu Poirier 2020-09-21 42 { 547ad00c50065bf Mathieu Poirier 2020-09-21 43 if (WARN_ON(!rpdev)) 547ad00c50065bf Mathieu Poirier 2020-09-21 @44 return -EINVAL; ^^^^^^^^^^^^^^ 547ad00c50065bf Mathieu Poirier 2020-09-21 45 if (!rpdev->ops || !rpdev->ops->cpu_to_transport16) 547ad00c50065bf Mathieu Poirier 2020-09-21 46 return -EPERM; ^^^^^^^^^^^^^ 547ad00c50065bf Mathieu Poirier 2020-09-21 47 547ad00c50065bf Mathieu Poirier 2020-09-21 48 return rpdev->ops->cpu_to_transport16(rpdev, val); 547ad00c50065bf Mathieu Poirier 2020-09-21 49 } --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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