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authorJiri Slaby <jslaby@suse.cz>2011-03-23 10:48:35 +0100
committerGreg Kroah-Hartman <gregkh@suse.de>2011-04-19 14:43:01 -0700
commit6716671d8c1c07a8072098764d1b7cbfef7412ad (patch)
tree7aa2e138fb9565ffd37591bfe1887b379f57dfd7 /drivers/tty/tty_io.c
parentc18d77aa00cde1215d9e045ba8f93004fe843f38 (diff)
TTY: introduce deinit helpers for proper ldisc shutdown
Introduce deinitialize_tty_struct which should be called after initialize_tty_struct and before successfull tty_ldisc_setup. It calls tty_ldisc_deinit which is opposite of tty_ldisc_init. It only puts a reference to ldisc and assigns NULL to tty->ldisc. It will be used to shut down ldisc when tty_release cannot be called yet. Signed-off-by: Jiri Slaby <jslaby@suse.cz> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Julian Anastasov <ja@ssi.bg> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/tty/tty_io.c')
-rw-r--r--drivers/tty/tty_io.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c
index 026bf2f6f5f2..f5dd23520fe3 100644
--- a/drivers/tty/tty_io.c
+++ b/drivers/tty/tty_io.c
@@ -2887,6 +2887,20 @@ void initialize_tty_struct(struct tty_struct *tty,
}
/**
+ * deinitialize_tty_struct
+ * @tty: tty to deinitialize
+ *
+ * This subroutine deinitializes a tty structure that has been newly
+ * allocated but tty_release cannot be called on that yet.
+ *
+ * Locking: none - tty in question must not be exposed at this point
+ */
+void deinitialize_tty_struct(struct tty_struct *tty)
+{
+ tty_ldisc_deinit(tty);
+}
+
+/**
* tty_put_char - write one character to a tty
* @tty: tty
* @ch: character