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nfp: flower: verify that block cb is not busy before binding

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When processing FLOW_BLOCK_BIND command on indirect block, check that flow
block cb is not busy.

Fixes: 0d4fd02e71 ("net: flow_offload: add flow_block_cb_is_busy() and use it")
Reported-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Acked-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vlad Buslov 2019-08-19 10:33:04 +03:00 committed by David S. Miller
parent cd9d4ff9b7
commit 1edfb8ed6c
1 changed files with 7 additions and 0 deletions
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7
drivers/net/ethernet/netronome/nfp/flower/offload.c
View file

@ -1416,6 +1416,13 @@ nfp_flower_setup_indr_tc_block(struct net_device *netdev, struct nfp_app *app,
switch (f->command) {
case FLOW_BLOCK_BIND:
cb_priv = nfp_flower_indr_block_cb_priv_lookup(app, netdev);
if (cb_priv &&
flow_block_cb_is_busy(nfp_flower_setup_indr_block_cb,
cb_priv,
&nfp_block_cb_list))
return -EBUSY;
cb_priv = kmalloc(sizeof(*cb_priv), GFP_KERNEL);
if (!cb_priv)
return -ENOMEM;