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n_hdlc: remove unused backup_tty 

It's only set to NULL and never properly used.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20200219084118.26491-10-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jiri Slaby 2020-02-19 09:41:04 +01:00 committed by Greg Kroah-Hartman
parent a1274b26ac
commit 4040c82860
1 changed files with 1 additions and 9 deletions
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10
drivers/tty/n_hdlc.c
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@ -125,7 +125,6 @@ struct n_hdlc_buf_list {
* struct n_hdlc - per device instance data structure
* @magic - magic value for structure
* @tty - ptr to TTY structure
* @backup_tty - TTY to use if tty gets closed
* @tbusy - reentrancy flag for tx wakeup code
* @woke_up - FIXME: describe this field
* @tx_buf_list - list of pending transmit frame buffers
@ -136,7 +135,6 @@ struct n_hdlc_buf_list {
struct n_hdlc {
int magic;
struct tty_struct *tty;
struct tty_struct *backup_tty;
int tbusy;
int woke_up;
struct n_hdlc_buf_list tx_buf_list;
@ -267,15 +265,9 @@ static void n_hdlc_tty_close(struct tty_struct *tty)
clear_bit(TTY_NO_WRITE_SPLIT,&tty->flags);
#endif
tty->disc_data = NULL;
if (tty == n_hdlc->backup_tty)
n_hdlc->backup_tty = NULL;
if (tty != n_hdlc->tty)
return;
if (n_hdlc->backup_tty) {
n_hdlc->tty = n_hdlc->backup_tty;
} else {
n_hdlc_release (n_hdlc);
}
n_hdlc_release (n_hdlc);
} /* end of n_hdlc_tty_close() */
/**