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authorJiri Slaby <jslaby@suse.cz>2021-05-05 12:19:09 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2021-05-13 17:57:16 +0300
commitf81ee8b8b8421dc06d13f197bb53191559cc51da (patch)
tree1034c668915cd8a499a186e25197783ff5f9b983 /drivers/tty/tty_ldisc.c
parent839e0f226d1c1d216ac3841b4710810080392c16 (diff)
downloadlinux-f81ee8b8b8421dc06d13f197bb53191559cc51da.tar.xz
tty: make tty_ldisc_ops a param in tty_unregister_ldisc
Make tty_unregister_ldisc symmetric to tty_register_ldisc by accepting struct tty_ldisc_ops as a parameter instead of ldisc number. This avoids checking of the ldisc number bounds in tty_unregister_ldisc. Signed-off-by: Jiri Slaby <jslaby@suse.cz> Cc: William Hubbs <w.d.hubbs@gmail.com> Cc: Chris Brannon <chris@the-brannons.com> Cc: Kirk Reiser <kirk@reisers.ca> Cc: Samuel Thibault <samuel.thibault@ens-lyon.org> Cc: Marcel Holtmann <marcel@holtmann.org> Cc: Johan Hedberg <johan.hedberg@gmail.com> Cc: Luiz Augusto von Dentz <luiz.dentz@gmail.com> Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: "David S. Miller" <davem@davemloft.net> Cc: Jakub Kicinski <kuba@kernel.org> Cc: Wolfgang Grandegger <wg@grandegger.com> Cc: Marc Kleine-Budde <mkl@pengutronix.de> Cc: Andreas Koensgen <ajk@comnets.uni-bremen.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Rodolfo Giometti <giometti@enneenne.com> Cc: Peter Ujfalusi <peter.ujfalusi@gmail.com> Cc: Liam Girdwood <lgirdwood@gmail.com> Cc: Mark Brown <broonie@kernel.org> Cc: Jaroslav Kysela <perex@perex.cz> Cc: Takashi Iwai <tiwai@suse.com> Link: https://lore.kernel.org/r/20210505091928.22010-17-jslaby@suse.cz Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/tty_ldisc.c')
-rw-r--r--drivers/tty/tty_ldisc.c9
1 files changed, 3 insertions, 6 deletions
diff --git a/drivers/tty/tty_ldisc.c b/drivers/tty/tty_ldisc.c
index 9aff04bee4cd..d02deeb5e584 100644
--- a/drivers/tty/tty_ldisc.c
+++ b/drivers/tty/tty_ldisc.c
@@ -87,19 +87,16 @@ EXPORT_SYMBOL(tty_register_ldisc);
* takes tty_ldiscs_lock to guard against ldisc races
*/
-int tty_unregister_ldisc(int disc)
+int tty_unregister_ldisc(struct tty_ldisc_ops *ldisc)
{
unsigned long flags;
int ret = 0;
- if (disc < N_TTY || disc >= NR_LDISCS)
- return -EINVAL;
-
raw_spin_lock_irqsave(&tty_ldiscs_lock, flags);
- if (tty_ldiscs[disc]->refcount)
+ if (tty_ldiscs[ldisc->num]->refcount)
ret = -EBUSY;
else
- tty_ldiscs[disc] = NULL;
+ tty_ldiscs[ldisc->num] = NULL;
raw_spin_unlock_irqrestore(&tty_ldiscs_lock, flags);
return ret;