Oliver Neukum 28a45e15c8 usb: cdc-acm: return correct error code on unsupported break ... [ Upstream commit 66aad7d8d3 ] In ACM support for sending breaks to devices is optional. If a device says that it doenot support sending breaks, the host must respect that. Given the number of optional features providing tty operations for each combination is not practical and errors need to be returned dynamically if unsupported features are requested. In case a device does not support break, we want the tty layer to treat that like it treats drivers that statically cannot support sending a break. It ignores the inability and does nothing. This patch uses EOPNOTSUPP to indicate that. Signed-off-by: Oliver Neukum <oneukum@suse.com> Fixes: 9e98966c7b ("tty: rework break handling") Link: https://lore.kernel.org/r/20231207132639.18250-1-oneukum@suse.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		2024-01-25 15:27:47 -08:00
..
cdc-acm.c	usb: cdc-acm: return correct error code on unsupported break	2024-01-25 15:27:47 -08:00
cdc-acm.h
cdc-wdm.c
Kconfig
Makefile
usblp.c
usbtmc.c