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CAPI: Clean up capiminor_*_ack

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No need for irqsave acquisition of acklock, bh-safe is sufficient.
Moverover, move kfree out of the lock and do not take acklock at all
in capiminor_del_all_ack as we are the last user of the list here.

Signed-off-by: Jan Kiszka <jan.kiszka@web.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jan Kiszka 2010-02-08 10:12:41 +00:00 committed by David S. Miller
parent dfbb84ffe9
commit 2b72b5bd65
1 changed files with 7 additions and 12 deletions
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19
drivers/isdn/capi/capi.c
View file

@ -149,7 +149,6 @@ static struct tty_driver *capinc_tty_driver;
static int capiminor_add_ack(struct capiminor *mp, u16 datahandle)
{
struct ackqueue_entry *n;
unsigned long flags;
n = kmalloc(sizeof(*n), GFP_ATOMIC);
if (unlikely(!n)) {
@ -158,44 +157,40 @@ static int capiminor_add_ack(struct capiminor *mp, u16 datahandle)
}
n->datahandle = datahandle;
INIT_LIST_HEAD(&n->list);
spin_lock_irqsave(&mp->ackqlock, flags);
spin_lock_bh(&mp->ackqlock);
list_add_tail(&n->list, &mp->ackqueue);
mp->nack++;
spin_unlock_irqrestore(&mp->ackqlock, flags);
spin_unlock_bh(&mp->ackqlock);
return 0;
}
static int capiminor_del_ack(struct capiminor *mp, u16 datahandle)
{
struct ackqueue_entry *p, *tmp;
unsigned long flags;
spin_lock_irqsave(&mp->ackqlock, flags);
spin_lock_bh(&mp->ackqlock);
list_for_each_entry_safe(p, tmp, &mp->ackqueue, list) {
if (p->datahandle == datahandle) {
list_del(&p->list);
kfree(p);
mp->nack--;
spin_unlock_irqrestore(&mp->ackqlock, flags);
spin_unlock_bh(&mp->ackqlock);
kfree(p);
return 0;
}
}
spin_unlock_irqrestore(&mp->ackqlock, flags);
spin_unlock_bh(&mp->ackqlock);
return -1;
}
static void capiminor_del_all_ack(struct capiminor *mp)
{
struct ackqueue_entry *p, *tmp;
unsigned long flags;
spin_lock_irqsave(&mp->ackqlock, flags);
list_for_each_entry_safe(p, tmp, &mp->ackqueue, list) {
list_del(&p->list);
kfree(p);
mp->nack--;
}
spin_unlock_irqrestore(&mp->ackqlock, flags);
}
@ -676,7 +671,7 @@ static void capi_recv_message(struct capi20_appl *ap, struct sk_buff *skb)
CAPIMSG_U16(skb->data, CAPIMSG_BASELEN+4+2));
#endif
kfree_skb(skb);
(void)capiminor_del_ack(mp, datahandle);
capiminor_del_ack(mp, datahandle);
tty = tty_port_tty_get(&mp->port);
if (tty) {
tty_wakeup(tty);