From: Guillaume Nault <g.nault@alphalink.fr>
Date: Fri, 10 Aug 2018 11:22:03 +0000 (+0200)
Subject: l2tp: let pppol2tp_ioctl() fallback to dev_ioctl()
X-Git-Tag: v4.19~410^2~44^2
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=4f5f85e9a70e13c8919e26609914253d18fbf858;p=platform%2Fkernel%2Flinux-rpi.git

l2tp: let pppol2tp_ioctl() fallback to dev_ioctl()

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>
---

diff --git a/net/l2tp/l2tp_ppp.c b/net/l2tp/l2tp_ppp.c
index e2eea60..62f2d3f 100644
--- a/net/l2tp/l2tp_ppp.c
+++ b/net/l2tp/l2tp_ppp.c
@@ -1137,7 +1137,7 @@ static int pppol2tp_ioctl(struct socket *sock, unsigned int cmd,
 		break;
 
 	default:
-		return -ENOSYS;
+		return -ENOIOCTLCMD;
 	}
 
 	return 0;