Hi Ashish, url: https://github.com/0day-ci/linux/commits/Ashish-Mhetre/memory-tegra-Add-MC-channels-and-error-logging/20220302-164625 base: https://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux.git for-next config: openrisc-randconfig-m031-20220302 (https://download.01.org/0day-ci/archive/20220303/202203031247.0bBX70B3-lkp@xxxxxxxxx/config) compiler: or1k-linux-gcc (GCC) 11.2.0 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> New smatch warnings: drivers/memory/tegra/mc.c:593 tegra30_mc_handle_irq() error: uninitialized symbol 'channel'. vim +/channel +593 drivers/memory/tegra/mc.c cc84c62c96f257 Ashish Mhetre 2022-03-02 516 cc84c62c96f257 Ashish Mhetre 2022-03-02 517 irqreturn_t tegra30_mc_handle_irq(int irq, void *data) 89184651631713 Thierry Reding 2014-04-16 518 { 89184651631713 Thierry Reding 2014-04-16 519 struct tegra_mc *mc = data; 1c74d5c0de0c2c Dmitry Osipenko 2018-04-09 520 unsigned long status; 89184651631713 Thierry Reding 2014-04-16 521 unsigned int bit; cc84c62c96f257 Ashish Mhetre 2022-03-02 522 int channel; cc84c62c96f257 Ashish Mhetre 2022-03-02 523 cc84c62c96f257 Ashish Mhetre 2022-03-02 524 if (mc->soc->num_channels && mc->soc->get_int_channel) { Let's assume "mc->soc->num_channels" is non-zero but there is no mc->soc->get_int_channel() function. cc84c62c96f257 Ashish Mhetre 2022-03-02 525 int err; cc84c62c96f257 Ashish Mhetre 2022-03-02 526 cc84c62c96f257 Ashish Mhetre 2022-03-02 527 err = mc->soc->get_int_channel(mc, &channel); cc84c62c96f257 Ashish Mhetre 2022-03-02 528 if (err < 0) cc84c62c96f257 Ashish Mhetre 2022-03-02 529 return IRQ_NONE; 89184651631713 Thierry Reding 2014-04-16 530 89184651631713 Thierry Reding 2014-04-16 531 /* mask all interrupts to avoid flooding */ cc84c62c96f257 Ashish Mhetre 2022-03-02 532 status = mc_ch_readl(mc, channel, MC_INTSTATUS) & mc->soc->intmask; cc84c62c96f257 Ashish Mhetre 2022-03-02 533 } else { 1c74d5c0de0c2c Dmitry Osipenko 2018-04-09 534 status = mc_readl(mc, MC_INTSTATUS) & mc->soc->intmask; cc84c62c96f257 Ashish Mhetre 2022-03-02 535 } cc84c62c96f257 Ashish Mhetre 2022-03-02 536 bf3fbdfbec947c Dmitry Osipenko 2018-04-09 537 if (!status) bf3fbdfbec947c Dmitry Osipenko 2018-04-09 538 return IRQ_NONE; 89184651631713 Thierry Reding 2014-04-16 539 89184651631713 Thierry Reding 2014-04-16 540 for_each_set_bit(bit, &status, 32) { 1079a66bc32ff0 Thierry Reding 2021-06-02 541 const char *error = tegra_mc_status_names[bit] ?: "unknown"; 89184651631713 Thierry Reding 2014-04-16 542 const char *client = "unknown", *desc; 89184651631713 Thierry Reding 2014-04-16 543 const char *direction, *secure; cc84c62c96f257 Ashish Mhetre 2022-03-02 544 u32 status_reg, addr_reg; cc84c62c96f257 Ashish Mhetre 2022-03-02 545 u32 intmask = BIT(bit); 89184651631713 Thierry Reding 2014-04-16 546 phys_addr_t addr = 0; cc84c62c96f257 Ashish Mhetre 2022-03-02 547 #ifdef CONFIG_PHYS_ADDR_T_64BIT cc84c62c96f257 Ashish Mhetre 2022-03-02 548 u32 addr_hi_reg = 0; cc84c62c96f257 Ashish Mhetre 2022-03-02 549 #endif 89184651631713 Thierry Reding 2014-04-16 550 unsigned int i; 89184651631713 Thierry Reding 2014-04-16 551 char perm[7]; 89184651631713 Thierry Reding 2014-04-16 552 u8 id, type; 89184651631713 Thierry Reding 2014-04-16 553 u32 value; 89184651631713 Thierry Reding 2014-04-16 554 cc84c62c96f257 Ashish Mhetre 2022-03-02 555 switch (intmask) { cc84c62c96f257 Ashish Mhetre 2022-03-02 556 case MC_INT_DECERR_VPR: cc84c62c96f257 Ashish Mhetre 2022-03-02 557 status_reg = MC_ERR_VPR_STATUS; cc84c62c96f257 Ashish Mhetre 2022-03-02 558 addr_reg = MC_ERR_VPR_ADR; cc84c62c96f257 Ashish Mhetre 2022-03-02 559 break; cc84c62c96f257 Ashish Mhetre 2022-03-02 560 cc84c62c96f257 Ashish Mhetre 2022-03-02 561 case MC_INT_SECERR_SEC: cc84c62c96f257 Ashish Mhetre 2022-03-02 562 status_reg = MC_ERR_SEC_STATUS; cc84c62c96f257 Ashish Mhetre 2022-03-02 563 addr_reg = MC_ERR_SEC_ADR; cc84c62c96f257 Ashish Mhetre 2022-03-02 564 break; cc84c62c96f257 Ashish Mhetre 2022-03-02 565 cc84c62c96f257 Ashish Mhetre 2022-03-02 566 case MC_INT_DECERR_MTS: cc84c62c96f257 Ashish Mhetre 2022-03-02 567 status_reg = MC_ERR_MTS_STATUS; cc84c62c96f257 Ashish Mhetre 2022-03-02 568 addr_reg = MC_ERR_MTS_ADR; cc84c62c96f257 Ashish Mhetre 2022-03-02 569 break; cc84c62c96f257 Ashish Mhetre 2022-03-02 570 cc84c62c96f257 Ashish Mhetre 2022-03-02 571 case MC_INT_DECERR_GENERALIZED_CARVEOUT: cc84c62c96f257 Ashish Mhetre 2022-03-02 572 status_reg = MC_ERR_GENERALIZED_CARVEOUT_STATUS; cc84c62c96f257 Ashish Mhetre 2022-03-02 573 addr_reg = MC_ERR_GENERALIZED_CARVEOUT_ADR; cc84c62c96f257 Ashish Mhetre 2022-03-02 574 break; cc84c62c96f257 Ashish Mhetre 2022-03-02 575 cc84c62c96f257 Ashish Mhetre 2022-03-02 576 case MC_INT_DECERR_ROUTE_SANITY: cc84c62c96f257 Ashish Mhetre 2022-03-02 577 status_reg = MC_ERR_ROUTE_SANITY_STATUS; cc84c62c96f257 Ashish Mhetre 2022-03-02 578 addr_reg = MC_ERR_ROUTE_SANITY_ADR; cc84c62c96f257 Ashish Mhetre 2022-03-02 579 break; cc84c62c96f257 Ashish Mhetre 2022-03-02 580 cc84c62c96f257 Ashish Mhetre 2022-03-02 581 default: cc84c62c96f257 Ashish Mhetre 2022-03-02 582 status_reg = MC_ERR_STATUS; cc84c62c96f257 Ashish Mhetre 2022-03-02 583 addr_reg = MC_ERR_ADR; cc84c62c96f257 Ashish Mhetre 2022-03-02 584 cc84c62c96f257 Ashish Mhetre 2022-03-02 585 #ifdef CONFIG_PHYS_ADDR_T_64BIT cc84c62c96f257 Ashish Mhetre 2022-03-02 586 if (mc->soc->has_addr_hi_reg) cc84c62c96f257 Ashish Mhetre 2022-03-02 587 addr_hi_reg = MC_ERR_ADR_HI; cc84c62c96f257 Ashish Mhetre 2022-03-02 588 #endif cc84c62c96f257 Ashish Mhetre 2022-03-02 589 break; cc84c62c96f257 Ashish Mhetre 2022-03-02 590 } cc84c62c96f257 Ashish Mhetre 2022-03-02 591 cc84c62c96f257 Ashish Mhetre 2022-03-02 592 if (mc->soc->num_channels) cc84c62c96f257 Ashish Mhetre 2022-03-02 @593 value = mc_ch_readl(mc, channel, status_reg); Then "channel" is uninitialized here. cc84c62c96f257 Ashish Mhetre 2022-03-02 594 else cc84c62c96f257 Ashish Mhetre 2022-03-02 595 value = mc_readl(mc, status_reg); 89184651631713 Thierry Reding 2014-04-16 596 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
