Hi Werner, kernel test robot noticed the following build warnings:
[auto build test WARNING on drm-misc/drm-misc-next] [also build test WARNING on drm-tip/drm-tip lee-leds/for-leds-next linus/master v6.11 next-20240927] [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#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Werner-Sembach/platform-x86-tuxedo-Add-virtual-LampArray-for-TUXEDO-NB04-devices/20240927-014628 base: git://anongit.freedesktop.org/drm/drm-misc drm-misc-next patch link: https://lore.kernel.org/r/20240926174405.110748-2-wse%40tuxedocomputers.com patch subject: [PATCH 1/1] platform/x86/tuxedo: Add virtual LampArray for TUXEDO NB04 devices config: i386-buildonly-randconfig-001-20240927 (https://download.01.org/0day-ci/archive/20240927/202409271601.cdupq1zd-...@intel.com/config) compiler: clang version 18.1.8 (https://github.com/llvm/llvm-project 3b5b5c1ec4a3095ab096dd780e84d7ab81f3d7ff) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240927/202409271601.cdupq1zd-...@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 <l...@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202409271601.cdupq1zd-...@intel.com/ All warnings (new ones prefixed by >>): >> drivers/platform/x86/tuxedo/tuxedo_nb04_wmi_ab_virtual_lamp_array.c:601:11: >> warning: variable 'lamp_count' is used uninitialized whenever 'if' condition >> is false [-Wsometimes-uninitialized] 601 | else if (driver_data->keyboard_type == WMI_AB_GET_DEVICE_STATUS_KEYBOARD_LAYOUT_ISO) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/platform/x86/tuxedo/tuxedo_nb04_wmi_ab_virtual_lamp_array.c:604:28: note: uninitialized use occurs here 604 | if (report->lamp_id_end > lamp_count - 1) { | ^~~~~~~~~~ drivers/platform/x86/tuxedo/tuxedo_nb04_wmi_ab_virtual_lamp_array.c:601:7: note: remove the 'if' if its condition is always true 601 | else if (driver_data->keyboard_type == WMI_AB_GET_DEVICE_STATUS_KEYBOARD_LAYOUT_ISO) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 602 | lamp_count = sizeof(sirius_16_ansii_kbl_mapping); drivers/platform/x86/tuxedo/tuxedo_nb04_wmi_ab_virtual_lamp_array.c:587:20: note: initialize the variable 'lamp_count' to silence this warning 587 | uint8_t lamp_count; | ^ | = '\0' >> drivers/platform/x86/tuxedo/tuxedo_nb04_wmi_ab_virtual_lamp_array.c:670:24: >> warning: format specifies type 'unsigned long' but the argument has type >> 'size_t' (aka 'unsigned int') [-Wformat] 669 | pr_debug("Recived report: rtype: %u, reqtype: %u, reportnum: %u, len: %lu buf:\n", rtype, | ~~~ | %zu 670 | reqtype, reportnum, len); | ^~~ include/linux/printk.h:595:38: note: expanded from macro 'pr_debug' 595 | no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__) | ~~~ ^~~~~~~~~~~ include/linux/printk.h:133:18: note: expanded from macro 'no_printk' 133 | _printk(fmt, ##__VA_ARGS__); \ | ~~~ ^~~~~~~~~~~ 2 warnings generated. vim +601 drivers/platform/x86/tuxedo/tuxedo_nb04_wmi_ab_virtual_lamp_array.c 581 582 static int handle_lamp_range_update_report(struct hid_device *hdev, 583 struct lamp_range_update_report_t *report) 584 { 585 int ret; 586 struct driver_data_t *driver_data = hdev->driver_data; 587 uint8_t lamp_count; 588 struct lamp_multi_update_report_t lamp_multi_update_report = { 589 .report_id = LAMP_MULTI_UPDATE_REPORT_ID 590 }; 591 592 // Catching missformated lamp_range_update_report and fail silently according to 593 // "HID Usage Tables v1.5" 594 if (report->lamp_id_start > report->lamp_id_end) { 595 pr_debug("lamp_id_start > lamp_id_end in lamp_range_update_report. Skippng whole report!\n"); 596 return sizeof(struct lamp_range_update_report_t); 597 } 598 599 if (driver_data->keyboard_type == WMI_AB_GET_DEVICE_STATUS_KEYBOARD_LAYOUT_ANSII) 600 lamp_count = sizeof(sirius_16_ansii_kbl_mapping); > 601 else if (driver_data->keyboard_type == > WMI_AB_GET_DEVICE_STATUS_KEYBOARD_LAYOUT_ISO) 602 lamp_count = sizeof(sirius_16_ansii_kbl_mapping); 603 604 if (report->lamp_id_end > lamp_count - 1) { 605 pr_debug("Out of bounds lamp_id_* in lamp_range_update_report. Skippng whole report!\n"); 606 return sizeof(struct lamp_range_update_report_t); 607 } 608 609 // Break handle_lamp_range_update_report call down to multiple 610 // handle_lamp_multi_update_report calls to easily ensure that mixing 611 // handle_lamp_range_update_report and handle_lamp_multi_update_report 612 // does not break things. 613 for (int i = report->lamp_id_start; i < report->lamp_id_end + 1; i = i + 8) { 614 lamp_multi_update_report.lamp_count = MIN(report->lamp_id_end + 1 - i, 8); 615 if (i + lamp_multi_update_report.lamp_count == report->lamp_id_end + 1) 616 lamp_multi_update_report.lamp_update_flags |= 617 LAMP_UPDATE_FLAGS_LAMP_UPDATE_COMPLETE; 618 619 for (int j = 0; j < lamp_multi_update_report.lamp_count; ++j) { 620 lamp_multi_update_report.lamp_id[j] = i + j; 621 lamp_multi_update_report.update_channels[j].red = 622 report->red_update_channel; 623 lamp_multi_update_report.update_channels[j].green = 624 report->green_update_channel; 625 lamp_multi_update_report.update_channels[j].blue = 626 report->blue_update_channel; 627 lamp_multi_update_report.update_channels[j].intensity = 628 report->intensity_update_channel; 629 } 630 631 ret = handle_lamp_multi_update_report(hdev, &lamp_multi_update_report); 632 if (ret < 0) 633 return ret; 634 else if (ret != sizeof(struct lamp_multi_update_report_t)) 635 return -EIO; 636 } 637 638 return sizeof(struct lamp_range_update_report_t); 639 } 640 641 642 struct __packed lamp_array_control_report_t { 643 const uint8_t report_id; 644 uint8_t autonomous_mode; 645 }; 646 647 static int handle_lamp_array_control_report(struct hid_device __always_unused *hdev, 648 struct lamp_array_control_report_t __always_unused *rep) 649 { 650 // The keyboard firmware doesn't have any built in effects or controls 651 // so this is a NOOP. 652 // According to the HID Documentation (HID Usage Tables v1.5) this 653 // function is optional and can be removed from the HID Report 654 // Descriptor, but it should first be confirmed that userspace respects 655 // this possibility too. The Microsoft MacroPad reference implementation 656 // (https://github.com/microsoft/RP2040MacropadHidSample 1d6c3ad) 657 // already deviates from the spec at another point, see 658 // handle_lamp_*_update_report. 659 660 return sizeof(struct lamp_array_control_report_t); 661 } 662 663 664 static int ll_raw_request(struct hid_device *hdev, unsigned char reportnum, __u8 *buf, size_t len, 665 unsigned char rtype, int reqtype) 666 { 667 int ret; 668 669 pr_debug("Recived report: rtype: %u, reqtype: %u, reportnum: %u, len: %lu buf:\n", rtype, > 670 reqtype, reportnum, len); 671 print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, buf, len); 672 673 ret = -EINVAL; 674 if (rtype == HID_FEATURE_REPORT) { 675 if (reqtype == HID_REQ_GET_REPORT) { 676 if (reportnum == LAMP_ARRAY_ATTRIBUTES_REPORT_ID 677 && len == sizeof(struct lamp_array_attributes_report_t)) 678 ret = handle_lamp_array_attributes_report( 679 hdev, (struct lamp_array_attributes_report_t *)buf); 680 else if (reportnum == LAMP_ATTRIBUTES_RESPONSE_REPORT_ID 681 && len == sizeof(struct lamp_attributes_response_report_t)) 682 ret = handle_lamp_attributes_response_report( 683 hdev, (struct lamp_attributes_response_report_t *)buf); 684 } else if (reqtype == HID_REQ_SET_REPORT) { 685 if (reportnum == LAMP_ATTRIBUTES_REQUEST_REPORT_ID 686 && len == sizeof(struct lamp_attributes_request_report_t)) 687 ret = handle_lamp_attributes_request_report( 688 hdev, (struct lamp_attributes_request_report_t *)buf); 689 else if (reportnum == LAMP_MULTI_UPDATE_REPORT_ID 690 && len == sizeof(struct lamp_multi_update_report_t)) 691 ret = handle_lamp_multi_update_report( 692 hdev, (struct lamp_multi_update_report_t *)buf); 693 else if (reportnum == LAMP_RANGE_UPDATE_REPORT_ID 694 && len == sizeof(struct lamp_range_update_report_t)) 695 ret = handle_lamp_range_update_report( 696 hdev, (struct lamp_range_update_report_t *)buf); 697 else if (reportnum == LAMP_ARRAY_CONTROL_REPORT_ID 698 && len == sizeof(struct lamp_array_control_report_t)) 699 ret = handle_lamp_array_control_report( 700 hdev, (struct lamp_array_control_report_t *)buf); 701 } 702 } 703 704 return ret; 705 } 706 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
