[PATCH 1/3] tty/serial_core: add ISO7816 infrastructure
From: Alan Cox <hidden>
Date: 2018-07-19 11:07:35
Also in:
linux-arch, linux-serial, lkml
quoted
quoted
+ if (!port->iso7816_config) + return -ENOIOCTLCMD;Why this error value?It was a mimic of RS485.
Which is what you want - it means the upper tty layer knows to offer the ioctl to other places and then return appropriately. Alan