Re: [PATCH v8 4/9] PCI/TSM: Establish Secure Sessions and Link Encryption

[kernel test robot <lkp@intel.com>]

Hi Dan,

kernel test robot noticed the following build errors:

[auto build test ERROR on 211ddde0823f1442e4ad052a2f30f050145ccada]

url:    https://github.com/intel-lab-lkp/linux/commits/Dan-Williams/coco-tsm-Introduce-a-core-device-for-TEE-Security-Managers/20251101-053254
base:   211ddde0823f1442e4ad052a2f30f050145ccada
patch link:    https://lore.kernel.org/r/20251031212902.2256310-5-dan.j.williams%40intel.com
patch subject: [PATCH v8 4/9] PCI/TSM: Establish Secure Sessions and Link Encryption
config: sparc-randconfig-r064-20251104 (https://download.01.org/0day-ci/archive/20251104/202511041832.ylcgIiqN-lkp@intel.com/config)
compiler: sparc-linux-gcc (GCC) 15.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251104/202511041832.ylcgIiqN-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 <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202511041832.ylcgIiqN-lkp@intel.com/

All errors (new ones prefixed by >>):

   sparc-linux-ld: drivers/pci/tsm.o: in function `connect_store':
>> drivers/pci/tsm.c:256:(.text+0xbdc): undefined reference to `find_tsm_dev'

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for TSM
   Depends on [n]: VIRT_DRIVERS [=n]
   Selected by [y]:
   - PCI_TSM [=y] && PCI [=y]


vim +256 drivers/pci/tsm.c

   238	
   239	static ssize_t connect_store(struct device *dev, struct device_attribute *attr,
   240				     const char *buf, size_t len)
   241	{
   242		struct pci_dev *pdev = to_pci_dev(dev);
   243		int rc, id;
   244	
   245		rc = sscanf(buf, "tsm%d\n", &id);
   246		if (rc != 1)
   247			return -EINVAL;
   248	
   249		ACQUIRE(rwsem_write_kill, lock)(&pci_tsm_rwsem);
   250		if ((rc = ACQUIRE_ERR(rwsem_write_kill, &lock)))
   251			return rc;
   252	
   253		if (pdev->tsm)
   254			return -EBUSY;
   255	
 > 256		struct tsm_dev *tsm_dev __free(put_tsm_dev) = find_tsm_dev(id);
   257		if (!is_link_tsm(tsm_dev))
   258			return -ENXIO;
   259	
   260		rc = pci_tsm_connect(pdev, tsm_dev);
   261		if (rc)
   262			return rc;
   263		return len;
   264	}
   265	static DEVICE_ATTR_RW(connect);
   266	

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https://github.com/intel/lkp-tests/wiki