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l2tp: let pppol2tp_ioctl() fallback to dev_ioctl()

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Return -ENOIOCTLCMD for unknown ioctl commands. This lets dev_ioctl()
handle generic socket ioctls like SIOCGIFNAME or SIOCGIFINDEX.
PF_PPPOX/PX_PROTO_OL2TP was one of the few socket types not honouring
this mechanism.

Signed-off-by: Guillaume Nault <g.nault@alphalink.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Guillaume Nault 2018-08-10 13:22:03 +02:00 committed by David S. Miller
parent 7390ed8a40
commit 4f5f85e9a7
1 changed files with 1 additions and 1 deletions
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net/l2tp/l2tp_ppp.c
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@ -1137,7 +1137,7 @@ static int pppol2tp_ioctl(struct socket *sock, unsigned int cmd,
break;
default:
return -ENOSYS;
return -ENOIOCTLCMD;
}
return 0;