Daniel Starke 4ca589661d tty: n_gsm: add ioctl for DLC specific parameter configuration ... Parameter negotiation has been introduced with commit 92f1f0c329 ("tty: n_gsm: add parameter negotiation support") However, means to set individual parameters per DLCI are not yet implemented. Furthermore, it is currently not possible to keep a DLCI half open until the user application sets the right parameters for it. This is required to allow a user application to set its specific parameters before the underlying link is established. Otherwise, the link is opened and re-established right afterwards if the user application sets incompatible parameters. This may be an unexpected behavior for the peer. Add parameter 'wait_config' to 'gsm_config' to support setups where the DLCI specific user application sets its specific parameters after open() and before the link gets fully established. Setting this to zero disables the user application specific DLCI configuration option. Add the ioctls 'GSMIOC_GETCONF_DLCI' and 'GSMIOC_SETCONF_DLCI' for the ldisc and virtual ttys. This gets/sets the DLCI specific parameters and may trigger a reconnect of the DLCI if incompatible values have been set. Only the parameters for the DLCI associated with the virtual tty can be set or retrieved if called on these. Add remark within the documentation to introduce the new ioctls. Link: https://lore.kernel.org/oe-kbuild-all/202302281856.S9Lz4gHB-lkp@intel.com/ Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Daniel Starke <daniel.starke@siemens.com> Link: https://lore.kernel.org/r/20230315105354.6234-1-daniel.starke@siemens.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2023-03-29 10:50:48 +02:00
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index.rst	Documentation: tty: move moxa-smartio.rst to tty	2022-04-14 18:24:24 +02:00
moxa-smartio.rst	Documentation: tty: move moxa-smartio.rst to tty	2022-04-14 18:24:24 +02:00
n_gsm.rst	tty: n_gsm: add ioctl for DLC specific parameter configuration	2023-03-29 10:50:48 +02:00
n_tty.rst	Documentation: move tty to driver-api	2022-04-14 18:24:23 +02:00
tty_buffer.rst	Documentation: move tty to driver-api	2022-04-14 18:24:23 +02:00
tty_driver.rst	Documentation: move tty to driver-api	2022-04-14 18:24:23 +02:00
tty_internals.rst	Documentation: move tty to driver-api	2022-04-14 18:24:23 +02:00
tty_ldisc.rst	Documentation: move tty to driver-api	2022-04-14 18:24:23 +02:00
tty_port.rst	Documentation: move tty to driver-api	2022-04-14 18:24:23 +02:00
tty_struct.rst	Documentation: move tty to driver-api	2022-04-14 18:24:23 +02:00