tipc: fix incorrect setting window for bcast link

In commit 16ad3f4022bb
("tipc: introduce variable window congestion control"), we applied
the algorithm to select window size from minimum window to the
configured maximum window for unicast link, and, besides we chose
to keep the window size for broadcast link unchanged and equal (i.e
fix window 50)

However, when setting maximum window variable via command, the window
variable was re-initialized to unexpect value (i.e 32).

We fix this by updating the fix window for broadcast as we stated.

Fixes: 16ad3f4022bb ("tipc: introduce variable window congestion control")
Acked-by: Jon Maloy <jmaloy@redhat.com>
Signed-off-by: Hoang Huu Le <hoang.h.le@dektech.com.au>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/net/tipc/bcast.c b/net/tipc/bcast.c
index c77fd13e27779b38326d98bfffb58711294d0e42..d4beca895992db6ea45b9e1776f3f2b916be0313 100644 (file)
--- a/net/tipc/bcast.c
+++ b/net/tipc/bcast.c
@@ -109,6 +109,7 @@ static void tipc_bcbase_select_primary(struct net *net)
        struct tipc_bc_base *bb = tipc_bc_base(net);
        int all_dests =  tipc_link_bc_peers(bb->link);
        int max_win = tipc_link_max_win(bb->link);
+       int min_win = tipc_link_min_win(bb->link);
        int i, mtu, prim;
 
        bb->primary_bearer = INVALID_BEARER_ID;
@@ -124,7 +125,8 @@ static void tipc_bcbase_select_primary(struct net *net)
                mtu = tipc_bearer_mtu(net, i);
                if (mtu < tipc_link_mtu(bb->link)) {
                        tipc_link_set_mtu(bb->link, mtu);
-                       tipc_link_set_queue_limits(bb->link, max_win,
+                       tipc_link_set_queue_limits(bb->link,
+                                                  min_win,
                                                   max_win);
                }
                bb->bcast_support &= tipc_bearer_bcast_support(net, i);
@@ -589,7 +591,7 @@ static int tipc_bc_link_set_queue_limits(struct net *net, u32 max_win)
        if (max_win > TIPC_MAX_LINK_WIN)
                return -EINVAL;
        tipc_bcast_lock(net);
-       tipc_link_set_queue_limits(l, BCLINK_WIN_MIN, max_win);
+       tipc_link_set_queue_limits(l, tipc_link_min_win(l), max_win);
        tipc_bcast_unlock(net);
        return 0;
 }