Hi Chen, [FYI, it's a private test report for your RFC patch.] [auto build test ERROR on pm/linux-next] [also build test ERROR on pci/next v5.10-rc4 next-20201117] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Chen-Baozi/acpi-irq-Add-stacked-... base: https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next config: i386-randconfig-r036-20201117 (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 reproduce (this is a W=1 build): # https://github.com/0day-ci/linux/commit/76f0a22bc937647cd1ee87ee48b2caf44... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Chen-Baozi/acpi-irq-Add-stacked-IRQ-domain-support-to-PCI-interrupt-link/20201117-214552 git checkout 76f0a22bc937647cd1ee87ee48b2caf44e72030a # save the attached .config to linux build tree make W=1 ARCH=i386 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): ld: drivers/acpi/pci_link.o: in function `acpi_pci_link_allocate_irq': ld: drivers/acpi/pci_irq.o: in function `acpi_pci_irq_enable': vim +670 drivers/acpi/pci_link.c 618 619 /* 620 * acpi_pci_link_allocate_irq 621 * success: return IRQ >= 0 622 * failure: return -1 623 */ 624 int acpi_pci_link_allocate_irq(acpi_handle handle, int index, int *triggering, 625 int *polarity, char **name, struct fwnode_handle **irq_domain) 626 { 627 int result; 628 struct acpi_device *device; 629 struct acpi_pci_link *link; 630 631 result = acpi_bus_get_device(handle, &device); 632 if (result) { 633 printk(KERN_ERR PREFIX "Invalid link device\n"); 634 return -1; 635 } 636 637 link = acpi_driver_data(device); 638 if (!link) { 639 printk(KERN_ERR PREFIX "Invalid link context\n"); 640 return -1; 641 } 642 643 /* TBD: Support multiple index (IRQ) entries per Link Device */ 644 if (index) { 645 printk(KERN_ERR PREFIX "Invalid index %d\n", index); 646 return -1; 647 } 648 649 mutex_lock(&acpi_link_lock); 650 if (acpi_pci_link_allocate(link)) { 651 mutex_unlock(&acpi_link_lock); 652 return -1; 653 } 654 655 if (!link->irq.active) { 656 mutex_unlock(&acpi_link_lock); 657 printk(KERN_ERR PREFIX "Link active IRQ is 0!\n"); 658 return -1; 659 } 660 link->refcnt++; 661 mutex_unlock(&acpi_link_lock); 662 663 if (triggering) 664 *triggering = link->irq.triggering; 665 if (polarity) 666 *polarity = link->irq.polarity; 667 if (name) 668 *name = acpi_device_bid(link->device); 669 if (irq_domain) 671 672 ACPI_DEBUG_PRINT((ACPI_DB_INFO, 673 "Link %s is referenced\n", 674 acpi_device_bid(link->device))); 675 return link->irq.active; 676 } 677 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org