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authorUrs Thuermann <urs.thuermann@volkswagen.de>2008-02-07 18:04:45 -0800
committerDavid S. Miller <davem@davemloft.net>2008-02-07 18:04:45 -0800
commita2fea5f19f970b45e854c22cab25250a79613643 (patch)
treeed65426674c487102a98d5d28e6a8b5653525a4a
parent5423dd67bd0108a180784c6f307646622e804c9b (diff)
downloadlinux-2.6.38-lt-ux500-a2fea5f19f970b45e854c22cab25250a79613643.tar.gz
[CAN]: Move proto_{,un}register() out of spin-locked region
The implementation of proto_register() has changed so that it can now sleep. The call to proto_register() must be moved out of the spin-locked region. Signed-off-by: Urs Thuermann <urs.thuermann@volkswagen.de> Signed-off-by: Oliver Hartkopp <oliver.hartkopp@volkswagen.de> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/can/af_can.c27
1 files changed, 14 insertions, 13 deletions
diff --git a/net/can/af_can.c b/net/can/af_can.c
index 1f51b8a1824..36b9f22ed83 100644
--- a/net/can/af_can.c
+++ b/net/can/af_can.c
@@ -656,26 +656,26 @@ int can_proto_register(struct can_proto *cp)
return -EINVAL;
}
+ err = proto_register(cp->prot, 0);
+ if (err < 0)
+ return err;
+
spin_lock(&proto_tab_lock);
if (proto_tab[proto]) {
printk(KERN_ERR "can: protocol %d already registered\n",
proto);
err = -EBUSY;
- goto errout;
+ } else {
+ proto_tab[proto] = cp;
+
+ /* use generic ioctl function if not defined by module */
+ if (!cp->ops->ioctl)
+ cp->ops->ioctl = can_ioctl;
}
+ spin_unlock(&proto_tab_lock);
- err = proto_register(cp->prot, 0);
if (err < 0)
- goto errout;
-
- proto_tab[proto] = cp;
-
- /* use generic ioctl function if the module doesn't bring its own */
- if (!cp->ops->ioctl)
- cp->ops->ioctl = can_ioctl;
-
- errout:
- spin_unlock(&proto_tab_lock);
+ proto_unregister(cp->prot);
return err;
}
@@ -694,9 +694,10 @@ void can_proto_unregister(struct can_proto *cp)
printk(KERN_ERR "BUG: can: protocol %d is not registered\n",
proto);
}
- proto_unregister(cp->prot);
proto_tab[proto] = NULL;
spin_unlock(&proto_tab_lock);
+
+ proto_unregister(cp->prot);
}
EXPORT_SYMBOL(can_proto_unregister);