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[AX.25]: Fix unchecked ax25_protocol_register uses.

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Replace ax25_protocol_register by ax25_register_pid which assumes the
caller has done the memory allocation.  This allows replacing the
kmalloc allocations entirely by static allocations.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ralf Baechle
2006-12-14 15:50:01 -08:00
committed by David S. Miller
parent c9266b99e2
commit 8d5cf596d1
4 changed files with 32 additions and 32 deletions
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41
net/ax25/ax25_iface.c
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@ -29,11 +29,7 @@
#include <linux/mm.h>
#include <linux/interrupt.h>
static struct protocol_struct {
struct protocol_struct *next;
unsigned int pid;
int (*func)(struct sk_buff *, ax25_cb *);
} *protocol_list = NULL;
static struct ax25_protocol *protocol_list;
static DEFINE_RWLOCK(protocol_list_lock);
static struct linkfail_struct {
@ -49,36 +45,23 @@ static struct listen_struct {
} *listen_list = NULL;
static DEFINE_SPINLOCK(listen_lock);
int ax25_protocol_register(unsigned int pid,
int (*func)(struct sk_buff *, ax25_cb *))
/*
* Do not register the internal protocols AX25_P_TEXT, AX25_P_SEGMENT,
* AX25_P_IP or AX25_P_ARP ...
*/
void ax25_register_pid(struct ax25_protocol *ap)
{
struct protocol_struct *protocol;
if (pid == AX25_P_TEXT || pid == AX25_P_SEGMENT)
return 0;
#ifdef CONFIG_INET
if (pid == AX25_P_IP || pid == AX25_P_ARP)
return 0;
#endif
if ((protocol = kmalloc(sizeof(*protocol), GFP_ATOMIC)) == NULL)
return 0;
protocol->pid = pid;
protocol->func = func;
write_lock_bh(&protocol_list_lock);
protocol->next = protocol_list;
protocol_list = protocol;
ap->next = protocol_list;
protocol_list = ap;
write_unlock_bh(&protocol_list_lock);
return 1;
}
EXPORT_SYMBOL(ax25_protocol_register);
EXPORT_SYMBOL_GPL(ax25_register_pid);
void ax25_protocol_release(unsigned int pid)
{
struct protocol_struct *s, *protocol;
struct ax25_protocol *s, *protocol;
write_lock_bh(&protocol_list_lock);
protocol = protocol_list;
@ -223,7 +206,7 @@ EXPORT_SYMBOL(ax25_listen_release);
int (*ax25_protocol_function(unsigned int pid))(struct sk_buff *, ax25_cb *)
{
int (*res)(struct sk_buff *, ax25_cb *) = NULL;
struct protocol_struct *protocol;
struct ax25_protocol *protocol;
read_lock(&protocol_list_lock);
for (protocol = protocol_list; protocol != NULL; protocol = protocol->next)
@ -263,7 +246,7 @@ void ax25_link_failed(ax25_cb *ax25, int reason)
int ax25_protocol_is_registered(unsigned int pid)
{
struct protocol_struct *protocol;
struct ax25_protocol *protocol;
int res = 0;
read_lock_bh(&protocol_list_lock);