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| /linux/drivers/tty/serial/ |
| H A D | serial_core.c | diff 51ad36baacb3b2fd1bd980138a937d30d6c84cdf Mon Jun 06 12:04:21 CEST 2022 Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> serial: return -EINVAL for non-legacy RS485 flags
In order to be add new flags more cleanly and safely, return -EINVAL
from TIOCSRS485 ioctl for the flags bits which are not among the
current legacy ones.
This might cause a regression for userspace as those non-flag bits do
not currently trigger -EINVAL. However, it would only occur if the
userspace is sending garbage bits so perhaps we'll get away with this
change.
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20220606100433.13793-25-ilpo.jarvinen@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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