Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=a2fea5f19f970b45e854c22cab25250a79613643
Commit: a2fea5f19f970b45e854c22cab25250a79613643
Parent: 5423dd67bd0108a180784c6f307646622e804c9b
Author: Urs Thuermann <[EMAIL PROTECTED]>
AuthorDate: Thu Feb 7 18:04:45 2008 -0800
Committer: David S. Miller <[EMAIL PROTECTED]>
CommitDate: Thu Feb 7 18:04:45 2008 -0800
[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 <[EMAIL PROTECTED]>
Signed-off-by: Oliver Hartkopp <[EMAIL PROTECTED]>
Signed-off-by: David S. Miller <[EMAIL PROTECTED]>
---
net/can/af_can.c | 27 ++++++++++++++-------------
1 files changed, 14 insertions(+), 13 deletions(-)
diff --git a/net/can/af_can.c b/net/can/af_can.c
index 1f51b8a..36b9f22 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);
-
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