diff options
| author | Jan Kiszka <jan.kiszka@web.de> | 2010-02-08 11:12:41 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-02-17 01:01:34 +0100 |
| commit | 2b72b5bd65f00bce786ca080aca27e91e90af6df (patch) | |
| tree | 729f94d53626579f37b89279a72f3bfd8f0ceb71 /drivers/isdn | |
| parent | CAPI: Fix locking around capiminor's output queue and drop workaround_lock (diff) | |
| download | linux-2b72b5bd65f00bce786ca080aca27e91e90af6df.tar.xz linux-2b72b5bd65f00bce786ca080aca27e91e90af6df.zip | |
CAPI: Clean up capiminor_*_ack
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>
Diffstat (limited to 'drivers/isdn')
| -rw-r--r-- | drivers/isdn/capi/capi.c | 19 |
1 files changed, 7 insertions, 12 deletions
diff --git a/drivers/isdn/capi/capi.c b/drivers/isdn/capi/capi.c index 074496fae8da..40b81b460e81 100644 --- a/drivers/isdn/capi/capi.c +++ b/drivers/isdn/capi/capi.c @@ -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); |