drivers/input/misc/iqs626a.c:780:61: warning: '%d' directive output may be truncated writing between 1 and 10 bytes into a region of size 2
From: kernel test robot
Date: Wed Oct 18 2023 - 12:36:14 EST
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 06dc10eae55b5ceabfef287a7e5f16ceea204aa0
commit: 4d3d2694e168c542b088eef5059d31498f679020 Input: iqs626a - drop unused device node references
date: 9 months ago
config: x86_64-randconfig-r015-20230901 (https://download.01.org/0day-ci/archive/20231019/202310190041.28bxUK0W-lkp@xxxxxxxxx/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231019/202310190041.28bxUK0W-lkp@xxxxxxxxx/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@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202310190041.28bxUK0W-lkp@xxxxxxxxx/
All warnings (new ones prefixed by >>):
drivers/input/misc/iqs626a.c: In function 'iqs626_parse_trackpad':
>> drivers/input/misc/iqs626a.c:780:61: warning: '%d' directive output may be truncated writing between 1 and 10 bytes into a region of size 2 [-Wformat-truncation=]
780 | snprintf(tc_name, sizeof(tc_name), "channel-%d", i);
| ^~
drivers/input/misc/iqs626a.c:780:52: note: directive argument in the range [0, 2147483646]
780 | snprintf(tc_name, sizeof(tc_name), "channel-%d", i);
| ^~~~~~~~~~~~
drivers/input/misc/iqs626a.c:780:17: note: 'snprintf' output between 10 and 19 bytes into a destination of size 10
780 | snprintf(tc_name, sizeof(tc_name), "channel-%d", i);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
vim +780 drivers/input/misc/iqs626a.c
712
713 static int iqs626_parse_trackpad(struct iqs626_private *iqs626,
714 struct fwnode_handle *ch_node,
715 enum iqs626_ch_id ch_id)
716 {
717 struct iqs626_sys_reg *sys_reg = &iqs626->sys_reg;
718 struct i2c_client *client = iqs626->client;
719 u8 *hyst = &sys_reg->tp_grp_reg.hyst;
720 int error, count, i;
721 unsigned int val;
722
723 if (!fwnode_property_read_u32(ch_node, "azoteq,lta-update", &val)) {
724 if (val > IQS626_MISC_A_TPx_LTA_UPDATE_MAX) {
725 dev_err(&client->dev,
726 "Invalid %s channel update rate: %u\n",
727 fwnode_get_name(ch_node), val);
728 return -EINVAL;
729 }
730
731 sys_reg->misc_a &= ~IQS626_MISC_A_TPx_LTA_UPDATE_MASK;
732 sys_reg->misc_a |= (val << IQS626_MISC_A_TPx_LTA_UPDATE_SHIFT);
733 }
734
735 if (!fwnode_property_read_u32(ch_node, "azoteq,filt-str-trackpad",
736 &val)) {
737 if (val > IQS626_FILT_STR_MAX) {
738 dev_err(&client->dev,
739 "Invalid %s channel filter strength: %u\n",
740 fwnode_get_name(ch_node), val);
741 return -EINVAL;
742 }
743
744 sys_reg->misc_b &= ~IQS626_MISC_B_FILT_STR_TPx;
745 sys_reg->misc_b |= val;
746 }
747
748 if (!fwnode_property_read_u32(ch_node, "azoteq,filt-str-np-cnt",
749 &val)) {
750 if (val > IQS626_FILT_STR_MAX) {
751 dev_err(&client->dev,
752 "Invalid %s channel filter strength: %u\n",
753 fwnode_get_name(ch_node), val);
754 return -EINVAL;
755 }
756
757 *hyst &= ~IQS626_FILT_STR_NP_TPx_MASK;
758 *hyst |= (val << IQS626_FILT_STR_NP_TPx_SHIFT);
759 }
760
761 if (!fwnode_property_read_u32(ch_node, "azoteq,filt-str-lp-cnt",
762 &val)) {
763 if (val > IQS626_FILT_STR_MAX) {
764 dev_err(&client->dev,
765 "Invalid %s channel filter strength: %u\n",
766 fwnode_get_name(ch_node), val);
767 return -EINVAL;
768 }
769
770 *hyst &= ~IQS626_FILT_STR_LP_TPx_MASK;
771 *hyst |= (val << IQS626_FILT_STR_LP_TPx_SHIFT);
772 }
773
774 for (i = 0; i < iqs626_channels[ch_id].num_ch; i++) {
775 u8 *ati_base = &sys_reg->tp_grp_reg.ch_reg_tp[i].ati_base;
776 u8 *thresh = &sys_reg->tp_grp_reg.ch_reg_tp[i].thresh;
777 struct fwnode_handle *tc_node;
778 char tc_name[10];
779
> 780 snprintf(tc_name, sizeof(tc_name), "channel-%d", i);
781
782 tc_node = fwnode_get_named_child_node(ch_node, tc_name);
783 if (!tc_node)
784 continue;
785
786 if (!fwnode_property_read_u32(tc_node, "azoteq,ati-base",
787 &val)) {
788 if (val < IQS626_TPx_ATI_BASE_MIN ||
789 val > IQS626_TPx_ATI_BASE_MAX) {
790 dev_err(&client->dev,
791 "Invalid %s %s ATI base: %u\n",
792 fwnode_get_name(ch_node), tc_name, val);
793 fwnode_handle_put(tc_node);
794 return -EINVAL;
795 }
796
797 *ati_base = val - IQS626_TPx_ATI_BASE_MIN;
798 }
799
800 if (!fwnode_property_read_u32(tc_node, "azoteq,thresh",
801 &val)) {
802 if (val > IQS626_CHx_THRESH_MAX) {
803 dev_err(&client->dev,
804 "Invalid %s %s threshold: %u\n",
805 fwnode_get_name(ch_node), tc_name, val);
806 fwnode_handle_put(tc_node);
807 return -EINVAL;
808 }
809
810 *thresh = val;
811 }
812
813 fwnode_handle_put(tc_node);
814 }
815
816 if (!fwnode_property_present(ch_node, "linux,keycodes"))
817 return 0;
818
819 count = fwnode_property_count_u32(ch_node, "linux,keycodes");
820 if (count > IQS626_NUM_GESTURES) {
821 dev_err(&client->dev, "Too many keycodes present\n");
822 return -EINVAL;
823 } else if (count < 0) {
824 dev_err(&client->dev, "Failed to count keycodes: %d\n", count);
825 return count;
826 }
827
828 error = fwnode_property_read_u32_array(ch_node, "linux,keycodes",
829 iqs626->tp_code, count);
830 if (error) {
831 dev_err(&client->dev, "Failed to read keycodes: %d\n", error);
832 return error;
833 }
834
835 sys_reg->misc_b &= ~IQS626_MISC_B_TPx_SWIPE;
836 if (fwnode_property_present(ch_node, "azoteq,gesture-swipe"))
837 sys_reg->misc_b |= IQS626_MISC_B_TPx_SWIPE;
838
839 if (!fwnode_property_read_u32(ch_node, "azoteq,timeout-tap-ms",
840 &val)) {
841 if (val > IQS626_TIMEOUT_TAP_MS_MAX) {
842 dev_err(&client->dev,
843 "Invalid %s channel timeout: %u\n",
844 fwnode_get_name(ch_node), val);
845 return -EINVAL;
846 }
847
848 sys_reg->timeout_tap = val / 16;
849 }
850
851 if (!fwnode_property_read_u32(ch_node, "azoteq,timeout-swipe-ms",
852 &val)) {
853 if (val > IQS626_TIMEOUT_SWIPE_MS_MAX) {
854 dev_err(&client->dev,
855 "Invalid %s channel timeout: %u\n",
856 fwnode_get_name(ch_node), val);
857 return -EINVAL;
858 }
859
860 sys_reg->timeout_swipe = val / 16;
861 }
862
863 if (!fwnode_property_read_u32(ch_node, "azoteq,thresh-swipe",
864 &val)) {
865 if (val > IQS626_THRESH_SWIPE_MAX) {
866 dev_err(&client->dev,
867 "Invalid %s channel threshold: %u\n",
868 fwnode_get_name(ch_node), val);
869 return -EINVAL;
870 }
871
872 sys_reg->thresh_swipe = val;
873 }
874
875 sys_reg->event_mask &= ~IQS626_EVENT_MASK_GESTURE;
876
877 return 0;
878 }
879
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki