From: Ralf Baechle <ralf@linux-mips.org>
To: "David S. Miller" <davem@davemloft.net>,
netdev@vger.kernel.org, linux-hams@vger.kernel.org
Subject: [AX.25] Fix locking of ax25 protocol function list.
Date: Tue, 11 Jul 2006 00:09:43 +0100 [thread overview]
Message-ID: <20060710230943.GA8350@linux-mips.org> (raw)
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>
diff --git a/net/ax25/ax25_iface.c b/net/ax25/ax25_iface.c
index 77ba07c..07ac020 100644
--- a/net/ax25/ax25_iface.c
+++ b/net/ax25/ax25_iface.c
@@ -66,10 +66,10 @@ #endif
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
{
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
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
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;
}
next reply other threads:[~2006-07-10 23:09 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-07-10 23:09 Ralf Baechle [this message]
2006-07-10 23:21 ` [AX.25] Fix locking of ax25 protocol function list David Miller
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