Hi Christian, url: https://github.com/0day-ci/linux/commits/Christian-K-nig/pci-export-pci_rebar_get_possible_sizes/20210105-224446 base: https://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci.git next config: x86_64-randconfig-m001-20210105 (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/pci/pci.c:3611 pci_rebar_get_possible_sizes() warn: statement has no effect 22 vim +3611 drivers/pci/pci.c 276b738deb5bf85 Christian König 2017-10-24 3596 u32 pci_rebar_get_possible_sizes(struct pci_dev *pdev, int bar) 276b738deb5bf85 Christian König 2017-10-24 3597 { 276b738deb5bf85 Christian König 2017-10-24 3598 int pos; 276b738deb5bf85 Christian König 2017-10-24 3599 u32 cap; 276b738deb5bf85 Christian König 2017-10-24 3600 276b738deb5bf85 Christian König 2017-10-24 3601 pos = pci_rebar_find_pos(pdev, bar); 276b738deb5bf85 Christian König 2017-10-24 3602 if (pos < 0) 276b738deb5bf85 Christian König 2017-10-24 3603 return 0; 276b738deb5bf85 Christian König 2017-10-24 3604 276b738deb5bf85 Christian König 2017-10-24 3605 pci_read_config_dword(pdev, pos + PCI_REBAR_CAP, &cap); 6838a45fc2394ec Christian König 2021-01-05 3606 cap = (cap & PCI_REBAR_CAP_SIZES) >> 4; 6838a45fc2394ec Christian König 2021-01-05 3607 6838a45fc2394ec Christian König 2021-01-05 3608 /* Sapphire RX 5600 XT Pulse has an invalid cap dword for BAR 0 */ 6838a45fc2394ec Christian König 2021-01-05 3609 if (pdev->vendor == PCI_VENDOR_ID_ATI && pdev->device == 0x731f && 6838a45fc2394ec Christian König 2021-01-05 3610 bar == 0 && cap == 0x700) 6838a45fc2394ec Christian König 2021-01-05 @3611 cap == 0x7f00; == vs =. 6838a45fc2394ec Christian König 2021-01-05 3612 6838a45fc2394ec Christian König 2021-01-05 3613 return cap; 276b738deb5bf85 Christian König 2017-10-24 3614 } --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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