From 55bef83cc68bda76a14a23b1076a9a9a9e43af68 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Thu, 15 Nov 2012 09:49:50 +0100 Subject: [PATCH] ISDN: capi, use kref from tty_port After commit "TTY: move tty buffers to tty_port", the tty buffers are not freed in some drivers. This is because tty_port_destructor is not called whenever a tty_port is freed. This was an assumption I counted with but was unfortunately untrue. So fix the drivers to fulfil this assumption. Here it is enough to switch to refcounting in tty_port. Signed-off-by: Jiri Slaby Signed-off-by: Greg Kroah-Hartman --- drivers/isdn/capi/capi.c | 36 +++++++++++++++++------------------- 1 file changed, 17 insertions(+), 19 deletions(-) diff --git a/drivers/isdn/capi/capi.c b/drivers/isdn/capi/capi.c index c679867c2ccd..89562a845f6a 100644 --- a/drivers/isdn/capi/capi.c +++ b/drivers/isdn/capi/capi.c @@ -77,8 +77,6 @@ struct ackqueue_entry { }; struct capiminor { - struct kref kref; - unsigned int minor; struct capi20_appl *ap; @@ -190,7 +188,20 @@ static void capiminor_del_all_ack(struct capiminor *mp) /* -------- struct capiminor ---------------------------------------- */ -static const struct tty_port_operations capiminor_port_ops; /* we have none */ +static void capiminor_destroy(struct tty_port *port) +{ + struct capiminor *mp = container_of(port, struct capiminor, port); + + kfree_skb(mp->outskb); + skb_queue_purge(&mp->inqueue); + skb_queue_purge(&mp->outqueue); + capiminor_del_all_ack(mp); + kfree(mp); +} + +static const struct tty_port_operations capiminor_port_ops = { + .destruct = capiminor_destroy, +}; static struct capiminor *capiminor_alloc(struct capi20_appl *ap, u32 ncci) { @@ -204,8 +215,6 @@ static struct capiminor *capiminor_alloc(struct capi20_appl *ap, u32 ncci) return NULL; } - kref_init(&mp->kref); - mp->ap = ap; mp->ncci = ncci; INIT_LIST_HEAD(&mp->ackqueue); @@ -247,21 +256,10 @@ err_out2: spin_unlock(&capiminors_lock); err_out1: - kfree(mp); + tty_port_put(&mp->port); return NULL; } -static void capiminor_destroy(struct kref *kref) -{ - struct capiminor *mp = container_of(kref, struct capiminor, kref); - - kfree_skb(mp->outskb); - skb_queue_purge(&mp->inqueue); - skb_queue_purge(&mp->outqueue); - capiminor_del_all_ack(mp); - kfree(mp); -} - static struct capiminor *capiminor_get(unsigned int minor) { struct capiminor *mp; @@ -269,7 +267,7 @@ static struct capiminor *capiminor_get(unsigned int minor) spin_lock(&capiminors_lock); mp = capiminors[minor]; if (mp) - kref_get(&mp->kref); + tty_port_get(&mp->port); spin_unlock(&capiminors_lock); return mp; @@ -277,7 +275,7 @@ static struct capiminor *capiminor_get(unsigned int minor) static inline void capiminor_put(struct capiminor *mp) { - kref_put(&mp->kref, capiminor_destroy); + tty_port_put(&mp->port); } static void capiminor_free(struct capiminor *mp)