Re: [PATCH] usb: core: new quirk to handle devices with zero configurations
From: kernel test robot
Date: Thu Feb 26 2026 - 07:21:37 EST
Hi Jie,
kernel test robot noticed the following build errors:
[auto build test ERROR on usb/usb-testing]
[also build test ERROR on usb/usb-next usb/usb-linus westeri-thunderbolt/next linus/master v7.0-rc1 next-20260225]
[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/Jie-Deng/usb-core-new-quirk-to-handle-devices-with-zero-configurations/20260226-180039
base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing
patch link: https://lore.kernel.org/r/20260226094737.1306471-1-dengjie03%40kylinos.cn
patch subject: [PATCH] usb: core: new quirk to handle devices with zero configurations
config: parisc-randconfig-r072-20260226 (https://download.01.org/0day-ci/archive/20260226/202602262055.asAbiuP0-lkp@xxxxxxxxx/config)
compiler: hppa-linux-gcc (GCC) 9.5.0
smatch version: v0.5.0-8994-gd50c5a4c
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260226/202602262055.asAbiuP0-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/202602262055.asAbiuP0-lkp@xxxxxxxxx/
All error/warnings (new ones prefixed by >>):
drivers/usb/core/config.c: In function 'usb_get_configuration':
>> drivers/usb/core/config.c:931:18: warning: missing terminating " character
931 | dev_info(ddev, "Device claims zero configurations,
| ^
drivers/usb/core/config.c:932:19: warning: missing terminating " character
932 | forcing to 1\n");
| ^
>> drivers/usb/core/config.c:1156: error: unterminated argument list invoking macro "dev_info"
1156 | }
|
>> drivers/usb/core/config.c:931:3: error: 'dev_info' undeclared (first use in this function); did you mean '_dev_info'?
931 | dev_info(ddev, "Device claims zero configurations,
| ^~~~~~~~
| _dev_info
drivers/usb/core/config.c:931:3: note: each undeclared identifier is reported only once for each function it appears in
>> drivers/usb/core/config.c:931:11: error: expected ';' at end of input
931 | dev_info(ddev, "Device claims zero configurations,
| ^
| ;
......
1156 | }
|
>> drivers/usb/core/config.c:931:3: error: expected declaration or statement at end of input
931 | dev_info(ddev, "Device claims zero configurations,
| ^~~~~~~~
>> drivers/usb/core/config.c:931:3: error: expected declaration or statement at end of input
>> drivers/usb/core/config.c:922:6: warning: unused variable 'result' [-Wunused-variable]
922 | int result;
| ^~~~~~
>> drivers/usb/core/config.c:921:32: warning: unused variable 'desc' [-Wunused-variable]
921 | struct usb_config_descriptor *desc;
| ^~~~
>> drivers/usb/core/config.c:920:17: warning: unused variable 'bigbuffer' [-Wunused-variable]
920 | unsigned char *bigbuffer;
| ^~~~~~~~~
>> drivers/usb/core/config.c:919:22: warning: unused variable 'length' [-Wunused-variable]
919 | unsigned int cfgno, length;
| ^~~~~~
>> drivers/usb/core/config.c:919:15: warning: unused variable 'cfgno' [-Wunused-variable]
919 | unsigned int cfgno, length;
| ^~~~~
>> drivers/usb/core/config.c:1156: warning: control reaches end of non-void function [-Wreturn-type]
1156 | }
|
At top level:
>> drivers/usb/core/config.c:659:12: warning: 'usb_parse_configuration' defined but not used [-Wunused-function]
659 | static int usb_parse_configuration(struct usb_device *dev, int cfgidx,
| ^~~~~~~~~~~~~~~~~~~~~~~
vim +/dev_info +1156 drivers/usb/core/config.c
81cf4a45360f70 Masakazu Mokuno 2017-11-10 1035
3148bf041d169a Andiry Xu 2011-09-23 1036 /* Get BOS descriptor set */
3148bf041d169a Andiry Xu 2011-09-23 1037 int usb_get_bos_descriptor(struct usb_device *dev)
3148bf041d169a Andiry Xu 2011-09-23 1038 {
3148bf041d169a Andiry Xu 2011-09-23 1039 struct device *ddev = &dev->dev;
3148bf041d169a Andiry Xu 2011-09-23 1040 struct usb_bos_descriptor *bos;
3148bf041d169a Andiry Xu 2011-09-23 1041 struct usb_dev_cap_header *cap;
81cf4a45360f70 Masakazu Mokuno 2017-11-10 1042 struct usb_ssp_cap_descriptor *ssp_cap;
3dd550a2d36596 Alan Stern 2019-09-04 1043 unsigned char *buffer, *buffer0;
81cf4a45360f70 Masakazu Mokuno 2017-11-10 1044 int length, total_len, num, i, ssac;
81cf4a45360f70 Masakazu Mokuno 2017-11-10 1045 __u8 cap_type;
3148bf041d169a Andiry Xu 2011-09-23 1046 int ret;
3148bf041d169a Andiry Xu 2011-09-23 1047
2740ac33c87b3d Johannes Brüderl 2025-12-07 1048 if (dev->quirks & USB_QUIRK_NO_BOS) {
2740ac33c87b3d Johannes Brüderl 2025-12-07 1049 dev_dbg(ddev, "skipping BOS descriptor\n");
2740ac33c87b3d Johannes Brüderl 2025-12-07 1050 return -ENOMSG;
2740ac33c87b3d Johannes Brüderl 2025-12-07 1051 }
2740ac33c87b3d Johannes Brüderl 2025-12-07 1052
bf4afc53b77aea Linus Torvalds 2026-02-21 1053 bos = kzalloc_obj(*bos);
3148bf041d169a Andiry Xu 2011-09-23 1054 if (!bos)
3148bf041d169a Andiry Xu 2011-09-23 1055 return -ENOMEM;
3148bf041d169a Andiry Xu 2011-09-23 1056
3148bf041d169a Andiry Xu 2011-09-23 1057 /* Get BOS descriptor */
3148bf041d169a Andiry Xu 2011-09-23 1058 ret = usb_get_descriptor(dev, USB_DT_BOS, 0, bos, USB_DT_BOS_SIZE);
a03ff54460817c Alan Stern 2019-05-13 1059 if (ret < USB_DT_BOS_SIZE || bos->bLength < USB_DT_BOS_SIZE) {
7a09c1269702db Alan Stern 2022-11-02 1060 dev_notice(ddev, "unable to get BOS descriptor or descriptor too short\n");
3148bf041d169a Andiry Xu 2011-09-23 1061 if (ret >= 0)
3148bf041d169a Andiry Xu 2011-09-23 1062 ret = -ENOMSG;
3148bf041d169a Andiry Xu 2011-09-23 1063 kfree(bos);
3148bf041d169a Andiry Xu 2011-09-23 1064 return ret;
3148bf041d169a Andiry Xu 2011-09-23 1065 }
3148bf041d169a Andiry Xu 2011-09-23 1066
3148bf041d169a Andiry Xu 2011-09-23 1067 length = bos->bLength;
3148bf041d169a Andiry Xu 2011-09-23 1068 total_len = le16_to_cpu(bos->wTotalLength);
3148bf041d169a Andiry Xu 2011-09-23 1069 num = bos->bNumDeviceCaps;
3148bf041d169a Andiry Xu 2011-09-23 1070 kfree(bos);
3148bf041d169a Andiry Xu 2011-09-23 1071 if (total_len < length)
3148bf041d169a Andiry Xu 2011-09-23 1072 return -EINVAL;
3148bf041d169a Andiry Xu 2011-09-23 1073
bf4afc53b77aea Linus Torvalds 2026-02-21 1074 dev->bos = kzalloc_obj(*dev->bos);
3148bf041d169a Andiry Xu 2011-09-23 1075 if (!dev->bos)
3148bf041d169a Andiry Xu 2011-09-23 1076 return -ENOMEM;
3148bf041d169a Andiry Xu 2011-09-23 1077
3148bf041d169a Andiry Xu 2011-09-23 1078 /* Now let's get the whole BOS descriptor set */
3148bf041d169a Andiry Xu 2011-09-23 1079 buffer = kzalloc(total_len, GFP_KERNEL);
3148bf041d169a Andiry Xu 2011-09-23 1080 if (!buffer) {
3148bf041d169a Andiry Xu 2011-09-23 1081 ret = -ENOMEM;
3148bf041d169a Andiry Xu 2011-09-23 1082 goto err;
3148bf041d169a Andiry Xu 2011-09-23 1083 }
3148bf041d169a Andiry Xu 2011-09-23 1084 dev->bos->desc = (struct usb_bos_descriptor *)buffer;
3148bf041d169a Andiry Xu 2011-09-23 1085
3148bf041d169a Andiry Xu 2011-09-23 1086 ret = usb_get_descriptor(dev, USB_DT_BOS, 0, buffer, total_len);
3148bf041d169a Andiry Xu 2011-09-23 1087 if (ret < total_len) {
7a09c1269702db Alan Stern 2022-11-02 1088 dev_notice(ddev, "unable to get BOS descriptor set\n");
3148bf041d169a Andiry Xu 2011-09-23 1089 if (ret >= 0)
3148bf041d169a Andiry Xu 2011-09-23 1090 ret = -ENOMSG;
3148bf041d169a Andiry Xu 2011-09-23 1091 goto err;
3148bf041d169a Andiry Xu 2011-09-23 1092 }
3dd550a2d36596 Alan Stern 2019-09-04 1093
3dd550a2d36596 Alan Stern 2019-09-04 1094 buffer0 = buffer;
3148bf041d169a Andiry Xu 2011-09-23 1095 total_len -= length;
3dd550a2d36596 Alan Stern 2019-09-04 1096 buffer += length;
3148bf041d169a Andiry Xu 2011-09-23 1097
3148bf041d169a Andiry Xu 2011-09-23 1098 for (i = 0; i < num; i++) {
3148bf041d169a Andiry Xu 2011-09-23 1099 cap = (struct usb_dev_cap_header *)buffer;
3148bf041d169a Andiry Xu 2011-09-23 1100
1c0edc3633b560 Alan Stern 2017-10-18 1101 if (total_len < sizeof(*cap) || total_len < cap->bLength) {
1c0edc3633b560 Alan Stern 2017-10-18 1102 dev->bos->desc->bNumDeviceCaps = i;
3148bf041d169a Andiry Xu 2011-09-23 1103 break;
1c0edc3633b560 Alan Stern 2017-10-18 1104 }
81cf4a45360f70 Masakazu Mokuno 2017-11-10 1105 cap_type = cap->bDevCapabilityType;
1c0edc3633b560 Alan Stern 2017-10-18 1106 length = cap->bLength;
81cf4a45360f70 Masakazu Mokuno 2017-11-10 1107 if (bos_desc_len[cap_type] && length < bos_desc_len[cap_type]) {
81cf4a45360f70 Masakazu Mokuno 2017-11-10 1108 dev->bos->desc->bNumDeviceCaps = i;
81cf4a45360f70 Masakazu Mokuno 2017-11-10 1109 break;
81cf4a45360f70 Masakazu Mokuno 2017-11-10 1110 }
81cf4a45360f70 Masakazu Mokuno 2017-11-10 1111
3148bf041d169a Andiry Xu 2011-09-23 1112 if (cap->bDescriptorType != USB_DT_DEVICE_CAPABILITY) {
7a09c1269702db Alan Stern 2022-11-02 1113 dev_notice(ddev, "descriptor type invalid, skip\n");
974bba5c118f4c Niklas Neronin 2023-11-15 1114 goto skip_to_next_descriptor;
3148bf041d169a Andiry Xu 2011-09-23 1115 }
3148bf041d169a Andiry Xu 2011-09-23 1116
81cf4a45360f70 Masakazu Mokuno 2017-11-10 1117 switch (cap_type) {
3148bf041d169a Andiry Xu 2011-09-23 1118 case USB_CAP_TYPE_EXT:
3148bf041d169a Andiry Xu 2011-09-23 1119 dev->bos->ext_cap =
3148bf041d169a Andiry Xu 2011-09-23 1120 (struct usb_ext_cap_descriptor *)buffer;
3148bf041d169a Andiry Xu 2011-09-23 1121 break;
3148bf041d169a Andiry Xu 2011-09-23 1122 case USB_SS_CAP_TYPE:
3148bf041d169a Andiry Xu 2011-09-23 1123 dev->bos->ss_cap =
3148bf041d169a Andiry Xu 2011-09-23 1124 (struct usb_ss_cap_descriptor *)buffer;
3148bf041d169a Andiry Xu 2011-09-23 1125 break;
3220befddc0da1 Mathias Nyman 2015-10-01 1126 case USB_SSP_CAP_TYPE:
81cf4a45360f70 Masakazu Mokuno 2017-11-10 1127 ssp_cap = (struct usb_ssp_cap_descriptor *)buffer;
81cf4a45360f70 Masakazu Mokuno 2017-11-10 1128 ssac = (le32_to_cpu(ssp_cap->bmAttributes) &
07b9f12864d16c Mathias Nyman 2017-12-19 1129 USB_SSP_SUBLINK_SPEED_ATTRIBS);
81cf4a45360f70 Masakazu Mokuno 2017-11-10 1130 if (length >= USB_DT_USB_SSP_CAP_SIZE(ssac))
81cf4a45360f70 Masakazu Mokuno 2017-11-10 1131 dev->bos->ssp_cap = ssp_cap;
3220befddc0da1 Mathias Nyman 2015-10-01 1132 break;
3148bf041d169a Andiry Xu 2011-09-23 1133 case CONTAINER_ID_TYPE:
3148bf041d169a Andiry Xu 2011-09-23 1134 dev->bos->ss_id =
3148bf041d169a Andiry Xu 2011-09-23 1135 (struct usb_ss_container_id_descriptor *)buffer;
3148bf041d169a Andiry Xu 2011-09-23 1136 break;
faee822c5a7ab9 Mathias Nyman 2016-02-12 1137 case USB_PTM_CAP_TYPE:
faee822c5a7ab9 Mathias Nyman 2016-02-12 1138 dev->bos->ptm_cap =
faee822c5a7ab9 Mathias Nyman 2016-02-12 1139 (struct usb_ptm_cap_descriptor *)buffer;
1d6903a617a221 Nick Desaulniers 2020-11-10 1140 break;
3148bf041d169a Andiry Xu 2011-09-23 1141 default:
3148bf041d169a Andiry Xu 2011-09-23 1142 break;
3148bf041d169a Andiry Xu 2011-09-23 1143 }
3dd550a2d36596 Alan Stern 2019-09-04 1144
974bba5c118f4c Niklas Neronin 2023-11-15 1145 skip_to_next_descriptor:
3dd550a2d36596 Alan Stern 2019-09-04 1146 total_len -= length;
3dd550a2d36596 Alan Stern 2019-09-04 1147 buffer += length;
3148bf041d169a Andiry Xu 2011-09-23 1148 }
3dd550a2d36596 Alan Stern 2019-09-04 1149 dev->bos->desc->wTotalLength = cpu_to_le16(buffer - buffer0);
3148bf041d169a Andiry Xu 2011-09-23 1150
3148bf041d169a Andiry Xu 2011-09-23 1151 return 0;
3148bf041d169a Andiry Xu 2011-09-23 1152
3148bf041d169a Andiry Xu 2011-09-23 1153 err:
3148bf041d169a Andiry Xu 2011-09-23 1154 usb_release_bos_descriptor(dev);
3148bf041d169a Andiry Xu 2011-09-23 1155 return ret;
3148bf041d169a Andiry Xu 2011-09-23 @1156 }
--
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