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authorJiri Slaby <jslaby@suse.cz>2012-11-15 12:49:50 +0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-11-16 05:20:57 +0400
commit55bef83cc68bda76a14a23b1076a9a9a9e43af68 (patch)
tree65614337f5cd23e1aebb5f97ae23fe53dbfd9fd5 /drivers/isdn
parent81c79838ca24f48e0e4bb96502d131d6af758ae0 (diff)
downloadlinux-55bef83cc68bda76a14a23b1076a9a9a9e43af68.tar.xz
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 <jslaby@suse.cz> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/isdn')
-rw-r--r--drivers/isdn/capi/capi.c36
1 files 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)