diff options
| author | Ralf Baechle <ralf@linux-mips.org> | 2006-07-10 16:21:29 -0700 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2006-07-12 13:58:40 -0700 |
| commit | 95ff9f4d3cc72b62b76498290d00d129e1e62545 (patch) | |
| tree | 05db2299df178da6eca5aef25dc18ece8f5053a3 | |
| parent | e55ffac6011731c455856072cb23aa20bd55c367 (diff) | |
| download | linux-95ff9f4d3cc72b62b76498290d00d129e1e62545.tar.bz2 | |
[AX.25]: Fix locking of ax25 protocol function list.
Delivery of AX.25 frame to the layer 3 protocols happens in softirq
context so locking needs to be bh-proof.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/ax25/ax25_iface.c | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/net/ax25/ax25_iface.c b/net/ax25/ax25_iface.c index 77ba07c67682..07ac0207eb69 100644 --- a/net/ax25/ax25_iface.c +++ b/net/ax25/ax25_iface.c @@ -66,10 +66,10 @@ int ax25_protocol_register(unsigned int pid, protocol->pid = pid; protocol->func = func; - write_lock(&protocol_list_lock); + write_lock_bh(&protocol_list_lock); protocol->next = protocol_list; protocol_list = protocol; - write_unlock(&protocol_list_lock); + write_unlock_bh(&protocol_list_lock); return 1; } @@ -80,16 +80,16 @@ void ax25_protocol_release(unsigned int pid) { struct protocol_struct *s, *protocol; - write_lock(&protocol_list_lock); + write_lock_bh(&protocol_list_lock); protocol = protocol_list; if (protocol == NULL) { - write_unlock(&protocol_list_lock); + write_unlock_bh(&protocol_list_lock); return; } if (protocol->pid == pid) { protocol_list = protocol->next; - write_unlock(&protocol_list_lock); + write_unlock_bh(&protocol_list_lock); kfree(protocol); return; } @@ -98,14 +98,14 @@ void ax25_protocol_release(unsigned int pid) if (protocol->next->pid == pid) { s = protocol->next; protocol->next = protocol->next->next; - write_unlock(&protocol_list_lock); + write_unlock_bh(&protocol_list_lock); kfree(s); return; } protocol = protocol->next; } - write_unlock(&protocol_list_lock); + write_unlock_bh(&protocol_list_lock); } EXPORT_SYMBOL(ax25_protocol_release); @@ -266,13 +266,13 @@ int ax25_protocol_is_registered(unsigned int pid) struct protocol_struct *protocol; int res = 0; - read_lock(&protocol_list_lock); + read_lock_bh(&protocol_list_lock); for (protocol = protocol_list; protocol != NULL; protocol = protocol->next) if (protocol->pid == pid) { res = 1; break; } - read_unlock(&protocol_list_lock); + read_unlock_bh(&protocol_list_lock); return res; } |