[L2TP]: Add the ability to autoload a pppox protocol module.
This patch allows a name "pppox-proto-nnn" to be used in modprobe.conf
to autoload a PPPoX protocol nnn.
Signed-off-by: James Chapman <jchapman@katalix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/pppox.c b/drivers/net/pppox.c
index 3f8115d..f3e47d0 100644
--- a/drivers/net/pppox.c
+++ b/drivers/net/pppox.c
@@ -31,6 +31,7 @@
#include <linux/ppp_defs.h>
#include <linux/if_ppp.h>
#include <linux/ppp_channel.h>
+#include <linux/kmod.h>
#include <net/sock.h>
@@ -114,6 +115,13 @@
goto out;
rc = -EPROTONOSUPPORT;
+#ifdef CONFIG_KMOD
+ if (!pppox_protos[protocol]) {
+ char buffer[32];
+ sprintf(buffer, "pppox-proto-%d", protocol);
+ request_module(buffer);
+ }
+#endif
if (!pppox_protos[protocol] ||
!try_module_get(pppox_protos[protocol]->owner))
goto out;