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Don't change number of HID devices until it's vetted

This commit is contained in:
Dan Halbert 2021-05-21 17:29:21 -04:00
parent 20946d97a1
commit 5a81f275cf
1 changed files with 4 additions and 2 deletions
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6
shared-module/usb_hid/__init__.c
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@ -160,11 +160,13 @@ bool common_hal_usb_hid_enable(const mp_obj_t devices) {
return false;
}
hid_devices_num = MP_OBJ_SMALL_INT_VALUE(mp_obj_len(devices));
if (hid_devices_num > MAX_HID_DEVICES) {
const mp_int_t num_devices = MP_OBJ_SMALL_INT_VALUE(mp_obj_len(devices));
if (num_devices > MAX_HID_DEVICES) {
mp_raise_ValueError_varg(translate("No more than %d HID devices allowed"), MAX_HID_DEVICES);
}
hid_devices_num = num_devices;
// Remember the devices in static storage so they live across VMs.
for (mp_int_t i = 0; i < hid_devices_num; i++) {
// devices has already been validated to contain only usb_hid_device_obj_t objects.