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Sun, 03 Dec 2023 06:31:42 +0000 Date: Sun, 3 Dec 2023 14:31:30 +0800 From: kernel test robot To: Mika Westerberg Cc: oe-kbuild-all@lists.linux.dev, linux-kernel@vger.kernel.org, Bjorn Helgaas , Lukas Wunner Subject: drivers/pci/pci.h:343:17: sparse: sparse: cast from restricted pci_channel_state_t Message-ID: <202312022235.tbbtU1lj-lkp@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 815fb87b753055df2d9e50f6cd80eb10235fe3e9 commit: c82458101d5490230d735caecce14c9c27b1010c PCI/PM: Mark devices disconnected if upstream PCIe link is down on resume date: 9 weeks ago config: sparc64-randconfig-r036-20230708 (https://download.01.org/0day-ci/archive/20231202/202312022235.tbbtU1lj-lkp@intel.com/config) compiler: sparc64-linux-gcc (GCC) 12.3.0 reproduce: (https://download.01.org/0day-ci/archive/20231202/202312022235.tbbtU1lj-lkp@intel.com/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot | Closes: https://lore.kernel.org/oe-kbuild-all/202312022235.tbbtU1lj-lkp@intel.com/ sparse warnings: (new ones prefixed by >>) drivers/pci/pci-driver.c:522:42: sparse: sparse: restricted pci_power_t degrades to integer drivers/pci/pci-driver.c:522:61: sparse: sparse: restricted pci_power_t degrades to integer drivers/pci/pci-driver.c:757:28: sparse: sparse: restricted pci_power_t degrades to integer drivers/pci/pci-driver.c:757:46: sparse: sparse: restricted pci_power_t degrades to integer drivers/pci/pci-driver.c: note: in included file (through include/linux/mmzone.h, include/linux/gfp.h, include/linux/xarray.h, ...): include/linux/page-flags.h:242:46: sparse: sparse: self-comparison always evaluates to false drivers/pci/pci-driver.c: note: in included file: >> drivers/pci/pci.h:343:17: sparse: sparse: cast from restricted pci_channel_state_t >> drivers/pci/pci.h:343:17: sparse: sparse: cast to restricted pci_channel_state_t drivers/pci/pci.h:346:23: sparse: sparse: cast from restricted pci_channel_state_t drivers/pci/pci.h:346:23: sparse: sparse: cast from restricted pci_channel_state_t drivers/pci/pci.h:346:23: sparse: sparse: cast to restricted pci_channel_state_t drivers/pci/pci.h:350:23: sparse: sparse: cast from restricted pci_channel_state_t drivers/pci/pci.h:350:23: sparse: sparse: cast from restricted pci_channel_state_t drivers/pci/pci.h:350:23: sparse: sparse: cast to restricted pci_channel_state_t vim +343 drivers/pci/pci.h ac04840350e2c2 Lukas Wunner 2023-03-11 324 a6bd101b8f84f9 Keith Busch 2018-09-20 325 /** a6bd101b8f84f9 Keith Busch 2018-09-20 326 * pci_dev_set_io_state - Set the new error state if possible. a6bd101b8f84f9 Keith Busch 2018-09-20 327 * 347269c113f10f Krzysztof Wilczyński 2021-07-03 328 * @dev: PCI device to set new error_state 347269c113f10f Krzysztof Wilczyński 2021-07-03 329 * @new: the state we want dev to be in a6bd101b8f84f9 Keith Busch 2018-09-20 330 * 74ff8864cc842b Lukas Wunner 2023-01-20 331 * If the device is experiencing perm_failure, it has to remain in that state. 74ff8864cc842b Lukas Wunner 2023-01-20 332 * Any other transition is allowed. a6bd101b8f84f9 Keith Busch 2018-09-20 333 * a6bd101b8f84f9 Keith Busch 2018-09-20 334 * Returns true if state has been changed to the requested state. a6bd101b8f84f9 Keith Busch 2018-09-20 335 */ a6bd101b8f84f9 Keith Busch 2018-09-20 336 static inline bool pci_dev_set_io_state(struct pci_dev *dev, a6bd101b8f84f9 Keith Busch 2018-09-20 337 pci_channel_state_t new) a6bd101b8f84f9 Keith Busch 2018-09-20 338 { 74ff8864cc842b Lukas Wunner 2023-01-20 339 pci_channel_state_t old; a6bd101b8f84f9 Keith Busch 2018-09-20 340 a6bd101b8f84f9 Keith Busch 2018-09-20 341 switch (new) { a6bd101b8f84f9 Keith Busch 2018-09-20 342 case pci_channel_io_perm_failure: 74ff8864cc842b Lukas Wunner 2023-01-20 @343 xchg(&dev->error_state, pci_channel_io_perm_failure); 74ff8864cc842b Lukas Wunner 2023-01-20 344 return true; a6bd101b8f84f9 Keith Busch 2018-09-20 345 case pci_channel_io_frozen: 74ff8864cc842b Lukas Wunner 2023-01-20 346 old = cmpxchg(&dev->error_state, pci_channel_io_normal, 74ff8864cc842b Lukas Wunner 2023-01-20 347 pci_channel_io_frozen); 74ff8864cc842b Lukas Wunner 2023-01-20 348 return old != pci_channel_io_perm_failure; a6bd101b8f84f9 Keith Busch 2018-09-20 349 case pci_channel_io_normal: 74ff8864cc842b Lukas Wunner 2023-01-20 350 old = cmpxchg(&dev->error_state, pci_channel_io_frozen, 74ff8864cc842b Lukas Wunner 2023-01-20 351 pci_channel_io_normal); 74ff8864cc842b Lukas Wunner 2023-01-20 352 return old != pci_channel_io_perm_failure; 74ff8864cc842b Lukas Wunner 2023-01-20 353 default: 74ff8864cc842b Lukas Wunner 2023-01-20 354 return false; a6bd101b8f84f9 Keith Busch 2018-09-20 355 } a6bd101b8f84f9 Keith Busch 2018-09-20 356 } 89ee9f7680031d Keith Busch 2017-03-29 357 :::::: The code at line 343 was first introduced by commit :::::: 74ff8864cc842be994853095dba6db48e716400a PCI: hotplug: Allow marking devices as disconnected during bind/unbind :::::: TO: Lukas Wunner :::::: CC: Bjorn Helgaas -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki