From 0d4fd02e7199fbf57c0d175dd1890c82cd4a6f4f Mon Sep 17 00:00:00 2001 From: Pablo Neira Ayuso Date: Tue, 9 Jul 2019 22:55:48 +0200 Subject: net: flow_offload: add flow_block_cb_is_busy() and use it This patch adds a function to check if flow block callback is already in use. Call this new function from flow_block_cb_setup_simple() and from drivers. Signed-off-by: Pablo Neira Ayuso Signed-off-by: David S. Miller --- drivers/net/ethernet/mscc/ocelot_tc.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers/net/ethernet/mscc/ocelot_tc.c') diff --git a/drivers/net/ethernet/mscc/ocelot_tc.c b/drivers/net/ethernet/mscc/ocelot_tc.c index 935a774cb291..9e6464ffae5d 100644 --- a/drivers/net/ethernet/mscc/ocelot_tc.c +++ b/drivers/net/ethernet/mscc/ocelot_tc.c @@ -153,6 +153,9 @@ static int ocelot_setup_tc_block(struct ocelot_port *port, switch (f->command) { case FLOW_BLOCK_BIND: + if (flow_block_cb_is_busy(cb, port, &ocelot_block_cb_list)) + return -EBUSY; + block_cb = flow_block_cb_alloc(f->net, cb, port, port, NULL); if (IS_ERR(block_cb)) return PTR_ERR(block_cb); -- cgit v1.2.3-59-g8ed1b