Johan Hovold dd5619582d USB: cdc-acm: fix unprivileged TIOCCSERIAL ... TIOCSSERIAL is a horrid, underspecified, legacy interface which for most serial devices is only useful for setting the close_delay and closing_wait parameters. A non-privileged user has only ever been able to set the since long deprecated ASYNC_SPD flags and trying to change any other *supported* feature should result in -EPERM being returned. Setting the current values for any supported features should return success. Fix the cdc-acm implementation which instead indicated that the TIOCSSERIAL ioctl was not even implemented when a non-privileged user set the current values. Fixes: ba2d8ce9db ("cdc-acm: implement TIOCSSERIAL to avoid blocking close(2)") Acked-by: Oliver Neukum <oneukum@suse.com> Signed-off-by: Johan Hovold <johan@kernel.org> Link: https://lore.kernel.org/r/20210408131602.27956-3-johan@kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2021-04-09 16:08:27 +02:00
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cdc-acm.c	USB: cdc-acm: fix unprivileged TIOCCSERIAL	2021-04-09 16:08:27 +02:00
cdc-acm.h	usb: cdc-acm: fix cooldown mechanism	2020-10-28 13:20:21 +01:00
cdc-wdm.c	USB: cdc-wdm: Fix use after free in service_outstanding_interrupt().	2020-12-28 15:44:23 +01:00
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: usblp: fix a hang in poll() if disconnected	2021-03-10 09:36:13 +01:00
usbtmc.c	USB: usbtmc: Bump USBTMC_API_VERSION value	2020-12-28 15:50:30 +01:00