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vendor device open fix for descriptor parsing

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This commit is contained in:
ZakDanger
2025-05-09 18:17:07 +10:00
parent 542e5b4550
commit f5944d35b0
1 changed files with 8 additions and 2 deletions
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10
src/class/vendor/vendor_device.c vendored
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@@ -196,8 +196,9 @@ void vendord_reset(uint8_t rhport) {
uint16_t vendord_open(uint8_t rhport, const tusb_desc_interface_t* desc_itf, uint16_t max_len) {
TU_VERIFY(TUSB_CLASS_VENDOR_SPECIFIC == desc_itf->bInterfaceClass, 0);
const uint8_t* p_desc = tu_desc_next(desc_itf);
const uint8_t* desc_end = (uint8_t const*)desc_itf + max_len;
const uint8_t* p_desc = (const uint8_t*)desc_itf;
const uint8_t* desc_end = p_desc + max_len;
p_desc = tu_desc_next(p_desc);
// Find available interface
vendord_interface_t* p_vendor = NULL;
@@ -235,6 +236,11 @@ uint16_t vendord_open(uint8_t rhport, const tusb_desc_interface_t* desc_itf, uin
p_desc = tu_desc_next(p_desc);
}
// skip any other descriptors until the next interface descriptor, or end of all descriptors
while ( (TUSB_DESC_INTERFACE != tu_desc_type(p_desc)) && (p_desc < desc_end) ) {
p_desc = tu_desc_next(p_desc);
}
return (uint16_t) ((uintptr_t) p_desc - (uintptr_t) desc_itf);
}