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Oliver Neukum 19e321c3ee 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>		History 2024-01-25 15:35:53 -08:00
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cdc-acm.c	usb: cdc-acm: return correct error code on unsupported break	2024-01-25 15:35:53 -08:00
cdc-acm.h	USB: cdc-acm: use CDC serial-state defines	2022-07-25 10:57:41 +02:00
cdc-wdm.c	wwan: core: Support slicing in port TX flow of WWAN subsystem	2023-03-17 22:38:31 -07:00
Kconfig	treewide: replace '---help---' in Kconfig files with 'help'	2020-06-14 01:57:21 +09:00
Makefile	USB: add SPDX identifiers to all remaining Makefiles	2017-11-07 15:53:48 +01:00
usblp.c	USB: make devnode() callback in usb_class_driver take a const *	2022-10-20 12:11:56 +02:00
usbtmc.c	USB: usbtmc: Fix direction for 0-length ioctl control messages	2023-05-13 17:25:49 +09:00