Bluetooth L2CAP Enhanced Credit Flow Control

configname: CONFIG_BT_LE_L2CAP_ECRED

Linux Kernel Configuration
└─>Networking support
└─>Bluetooth L2CAP Enhanced Credit Flow Control
In linux kernel since version 6.2 (release Date: 2023-02-19)  
Bluetooth Low Energy L2CAP Enhanced Credit Flow Control available with
Bluetooth version 5.2 or later.

This can be overridden by passing bluetooth.enable_ecred=[1|0]
on the kernel commandline.