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octeontx2-af: Check return value of nix_get_nixlf before using nixlf

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If a NIXLF is not attached to a PF/VF device then
nix_get_nixlf function fails and returns proper error
code. But npc_get_default_entry_action does not check it
and uses garbage value in subsequent calls. Fix this
by cheking the return value of nix_get_nixlf.

Fixes: 967db3529eca ("octeontx2-af: add support for multicast/promisc packet replication feature")
Signed-off-by: Subbaraya Sundeep <sbhatta@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Subbaraya Sundeep 2023-11-29 11:11:48 +05:30 committed by David S. Miller
parent 9572c94938
commit 830139e7b6
1 changed files with 7 additions and 1 deletions
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8
drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c
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@ -389,7 +389,13 @@ static u64 npc_get_default_entry_action(struct rvu *rvu, struct npc_mcam *mcam,
int bank, nixlf, index;
/* get ucast entry rule entry index */
nix_get_nixlf(rvu, pf_func, &nixlf, NULL);
if (nix_get_nixlf(rvu, pf_func, &nixlf, NULL)) {
dev_err(rvu->dev, "%s: nixlf not attached to pcifunc:0x%x\n",
__func__, pf_func);
/* Action 0 is drop */
return 0;
}
index = npc_get_nixlf_mcam_index(mcam, pf_func, nixlf,
NIXLF_UCAST_ENTRY);
bank = npc_get_bank(mcam, index);