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tty: tty_port_open, document shutdown vs failed activate 

Add a note that ->shutdown is not called when ->activate fails. Just so
we are clear.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20220124071430.14907-5-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jiri Slaby 2022-01-24 08:14:23 +01:00 committed by Greg Kroah-Hartman
parent 4e2a44c140
commit d56738a38a
1 changed files with 3 additions and 0 deletions
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drivers/tty/tty_port.c
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@ -736,6 +736,9 @@ EXPORT_SYMBOL_GPL(tty_port_install);
* the device to be ready using tty_port_block_til_ready() (e.g. raises
* DTR/CTS and waits for carrier).
*
* Note that @port->ops->shutdown is not called when @port->ops->activate
* returns an error (on the contrary, @tty->ops->close is).
*
* Locking: Caller holds tty lock.
*
* Note: may drop and reacquire tty lock (in tty_port_block_til_ready()) so