can: avoids a false warning

At this point optlen == sizeof(sfilter) but some compilers are dumb.

Reported-by: Németh Márton <nm127@freemail.h
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Acked-by: Oliver Hartkopp <oliver@hartkopp.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/can/raw.c b/net/can/raw.c
index 3a7dffb..da99cf1 100644 (file)
--- a/net/can/raw.c
+++ b/net/can/raw.c
@@ -445,7 +445,7 @@ static int raw_setsockopt(struct socket *sock, int level, int optname,
                                return -EFAULT;
                        }
                } else if (count == 1) {
-                       if (copy_from_user(&sfilter, optval, optlen))
+                       if (copy_from_user(&sfilter, optval, sizeof(sfilter)))
                                return -EFAULT;
                }