From: Tom Rix trix@redhat.com
[ Upstream commit 33b5bc9e703383e396f275d51fc4bafa48dbae5a ]
Clang static analysis reports this representative issue rvu_npc.c:898:15: warning: Assigned value is garbage or undefined req.match_id = action.match_id; ^ ~~~~~~~~~~~~~~~
The initial setting of action is conditional on if (is_mcam_entry_enabled(...)) The later check of action.op will sometimes be garbage. So initialize action.
Reduce setting of *(u64 *)&action = 0x00; to *(u64 *)&action = 0;
Fixes: 967db3529eca ("octeontx2-af: add support for multicast/promisc packet replication feature") Signed-off-by: Tom Rix trix@redhat.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org --- .../net/ethernet/marvell/octeontx2/af/rvu_npc.c | 15 +++++++-------- 1 file changed, 7 insertions(+), 8 deletions(-)
diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c index fbb573c40c1a..c4a46b295d40 100644 --- a/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c +++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c @@ -605,7 +605,7 @@ void rvu_npc_install_ucast_entry(struct rvu *rvu, u16 pcifunc, struct npc_install_flow_req req = { 0 }; struct npc_install_flow_rsp rsp = { 0 }; struct npc_mcam *mcam = &rvu->hw->mcam; - struct nix_rx_action action; + struct nix_rx_action action = { 0 }; int blkaddr, index;
/* AF's and SDP VFs work in promiscuous mode */ @@ -626,7 +626,6 @@ void rvu_npc_install_ucast_entry(struct rvu *rvu, u16 pcifunc, *(u64 *)&action = npc_get_mcam_action(rvu, mcam, blkaddr, index); } else { - *(u64 *)&action = 0x00; action.op = NIX_RX_ACTIONOP_UCAST; action.pf_func = pcifunc; } @@ -657,7 +656,7 @@ void rvu_npc_install_promisc_entry(struct rvu *rvu, u16 pcifunc, struct npc_mcam *mcam = &rvu->hw->mcam; struct rvu_hwinfo *hw = rvu->hw; int blkaddr, ucast_idx, index; - struct nix_rx_action action; + struct nix_rx_action action = { 0 }; u64 relaxed_mask;
if (!hw->cap.nix_rx_multicast && is_cgx_vf(rvu, pcifunc)) @@ -685,14 +684,14 @@ void rvu_npc_install_promisc_entry(struct rvu *rvu, u16 pcifunc, blkaddr, ucast_idx);
if (action.op != NIX_RX_ACTIONOP_RSS) { - *(u64 *)&action = 0x00; + *(u64 *)&action = 0; action.op = NIX_RX_ACTIONOP_UCAST; }
/* RX_ACTION set to MCAST for CGX PF's */ if (hw->cap.nix_rx_multicast && pfvf->use_mce_list && is_pf_cgxmapped(rvu, rvu_get_pf(pcifunc))) { - *(u64 *)&action = 0x00; + *(u64 *)&action = 0; action.op = NIX_RX_ACTIONOP_MCAST; pfvf = rvu_get_pfvf(rvu, pcifunc & ~RVU_PFVF_FUNC_MASK); action.index = pfvf->promisc_mce_idx; @@ -832,7 +831,7 @@ void rvu_npc_install_allmulti_entry(struct rvu *rvu, u16 pcifunc, int nixlf, struct rvu_hwinfo *hw = rvu->hw; int blkaddr, ucast_idx, index; u8 mac_addr[ETH_ALEN] = { 0 }; - struct nix_rx_action action; + struct nix_rx_action action = { 0 }; struct rvu_pfvf *pfvf; u16 vf_func;
@@ -861,14 +860,14 @@ void rvu_npc_install_allmulti_entry(struct rvu *rvu, u16 pcifunc, int nixlf, blkaddr, ucast_idx);
if (action.op != NIX_RX_ACTIONOP_RSS) { - *(u64 *)&action = 0x00; + *(u64 *)&action = 0; action.op = NIX_RX_ACTIONOP_UCAST; action.pf_func = pcifunc; }
/* RX_ACTION set to MCAST for CGX PF's */ if (hw->cap.nix_rx_multicast && pfvf->use_mce_list) { - *(u64 *)&action = 0x00; + *(u64 *)&action = 0; action.op = NIX_RX_ACTIONOP_MCAST; action.index = pfvf->mcast_mce_idx; }