[NET]: Add a dev_ioctl() fallback to sock_ioctl()

Currently all network protocols need to call dev_ioctl as the default
fallback in their ioctl implementations.  This patch adds a fallback
to dev_ioctl to sock_ioctl if the protocol returned -ENOIOCTLCMD.
This way all the procotol ioctl handlers can be simplified and we don't
need to export dev_ioctl.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 1 deletions

diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index deda6fdb1e53..f69e5ed9bd06 100644
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -1521,7 +1521,7 @@ static int packet_ioctl(struct socket *sock, unsigned int cmd,
 #endif
 
                 default:
-                        return dev_ioctl(cmd, (void __user *)arg);
+                        return -ENOIOCTLCMD;
         }
         return 0;
 }