[PATCH] net: bpfilter: fallback to netfilter if failed to load bpfilter kernel module

[Konstantin Khlebnikov]

If bpfilter is not available return ENOPROTOOPT to fallback to netfilter.

Function request_module() returns both errors and userspace exit codes.
Just ignore them. Rechecking bpfilter_ops is enough.

Fixes: d2ba09c17a06 ("net: add skeleton of bpfilter kernel module")
Signed-off-by: Konstantin Khlebnikov <khlebni...@yandex-team.ru>
---
 net/ipv4/bpfilter/sockopt.c |    6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/net/ipv4/bpfilter/sockopt.c b/net/ipv4/bpfilter/sockopt.c
index 15427163a041..0480918bfc7c 100644
--- a/net/ipv4/bpfilter/sockopt.c
+++ b/net/ipv4/bpfilter/sockopt.c
@@ -30,13 +30,11 @@ static int bpfilter_mbox_request(struct sock *sk, int 
optname,
        mutex_lock(&bpfilter_ops.lock);
        if (!bpfilter_ops.sockopt) {
                mutex_unlock(&bpfilter_ops.lock);
-               err = request_module("bpfilter");
+               request_module("bpfilter");
                mutex_lock(&bpfilter_ops.lock);
 
-               if (err)
-                       goto out;
                if (!bpfilter_ops.sockopt) {
-                       err = -ECHILD;
+                       err = -ENOPROTOOPT;
                        goto out;
                }
        }