tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 5631c5e0eb9035d92ceb20fcd9cdb7779a3f5cc7 commit: 57a10d8c1123068e3cb06434fbc9634f945d3062 ptp: Add a ptp clock driver for IDT 82P33 SMU. date: 6 months ago compiler: powerpc64-linux-gcc (GCC) 9.3.0 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; cppcheck warnings: (new ones prefixed by >>) return err; ^ drivers/ptp/ptp_idt82p33.c:462:6: note: first condition if (err) ^ drivers/ptp/ptp_idt82p33.c:469:9: note: second condition return err; ^ vim +/err +469 drivers/ptp/ptp_idt82p33.c 440 441 static int idt82p33_measure_tod_write_overhead(struct idt82p33_channel *channel) 442 { 443 s64 trailing_overhead_ns, one_byte_write_ns, gap_ns; 444 struct idt82p33 *idt82p33 = channel->idt82p33; 445 int err; 446 447 idt82p33->tod_write_overhead_ns = 0; 448 449 err = idt82p33_measure_settime_gettime_gap_overhead(channel, &gap_ns); 450 451 if (err) 452 return err; 453 454 err = idt82p33_measure_one_byte_write_overhead(channel, 455 &one_byte_write_ns); 456 457 if (err) 458 return err; 459 460 err = idt82p33_measure_tod_write_9_byte_overhead(channel); 461 462 if (err) 463 return err; 464 465 trailing_overhead_ns = gap_ns - (2 * one_byte_write_ns); 466 467 idt82p33->tod_write_overhead_ns -= trailing_overhead_ns; 468 470 } 471 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org