[PATCH v8] net/bnx2x: fix warnings about rte_memcpy lengths

["Morten Brørup" <mb@smartsharesystems.com>]

Bugfix: The vlan in the bulletin does not contain a VLAN header, only the
VLAN ID, so only copy 2 byte, not 4. The target structure has padding
after the field, so copying 2 byte too many is effectively harmless.
There is no need to backport this patch.

Use RTE_PTR_ADD where copying arrays to the offset of a first field in a
structure holding multiple fields, to avoid compiler warnings with
decorated rte_memcpy.

Bugzilla ID: 1146

Fixes: 540a211084a7695a1c7bc43068934c140d6989be ("bnx2x: driver core")
Cc: stephen@networkplumber.org
Cc: rmody@marvell.com
Cc: shshaikh@marvell.com
Cc: palok@marvell.com

Signed-off-by: Morten Brørup <mb@smartsharesystems.com>
Acked-by: Devendra Singh Rawat <dsinghrawat@marvell.com>
---
v8:
* Use memcpy instead of rte_memcpy in slow path. (Stephen Hemminger)
v7:
* No changes.
v6:
* Add Fixes to patch description.
* Fix checkpatch warnings.
v5:
* No changes.
v4:
* Type casting did not fix the warnings, so use RTE_PTR_ADD instead.
v3:
* First patch in series.
---
 drivers/net/bnx2x/bnx2x_stats.c | 14 ++++++++------
 drivers/net/bnx2x/bnx2x_vfpf.c  | 14 +++++++-------
 2 files changed, 15 insertions(+), 13 deletions(-)

diff --git a/drivers/net/bnx2x/bnx2x_stats.c b/drivers/net/bnx2x/bnx2x_stats.c
index c07b01510a..8105375d44 100644
--- a/drivers/net/bnx2x/bnx2x_stats.c
+++ b/drivers/net/bnx2x/bnx2x_stats.c
@@ -114,7 +114,7 @@ bnx2x_hw_stats_post(struct bnx2x_softc *sc)
 
 	/* Update MCP's statistics if possible */
 	if (sc->func_stx) {
-		rte_memcpy(BNX2X_SP(sc, func_stats), &sc->func_stats,
+		memcpy(BNX2X_SP(sc, func_stats), &sc->func_stats,
 				sizeof(sc->func_stats));
 	}
 
@@ -817,10 +817,10 @@ bnx2x_hw_stats_update(struct bnx2x_softc *sc)
 			  etherstatspktsover1522octets);
     }
 
-    rte_memcpy(old, new, sizeof(struct nig_stats));
+    memcpy(old, new, sizeof(struct nig_stats));
 
-    rte_memcpy(&(estats->rx_stat_ifhcinbadoctets_hi), &(pstats->mac_stx[1]),
-	   sizeof(struct mac_stx));
+	memcpy(RTE_PTR_ADD(estats, offsetof(struct bnx2x_eth_stats, rx_stat_ifhcinbadoctets_hi)),
+			&pstats->mac_stx[1], sizeof(struct mac_stx));
     estats->brb_drop_hi = pstats->brb_drop_hi;
     estats->brb_drop_lo = pstats->brb_drop_lo;
 
@@ -1492,9 +1492,11 @@ bnx2x_stats_init(struct bnx2x_softc *sc)
 		REG_RD(sc, NIG_REG_STAT0_BRB_TRUNCATE + port*0x38);
 	if (!CHIP_IS_E3(sc)) {
 		REG_RD_DMAE(sc, NIG_REG_STAT0_EGRESS_MAC_PKT0 + port*0x50,
-				&(sc->port.old_nig_stats.egress_mac_pkt0_lo), 2);
+				RTE_PTR_ADD(&sc->port.old_nig_stats,
+				offsetof(struct nig_stats, egress_mac_pkt0_lo)), 2);
 		REG_RD_DMAE(sc, NIG_REG_STAT0_EGRESS_MAC_PKT1 + port*0x50,
-				&(sc->port.old_nig_stats.egress_mac_pkt1_lo), 2);
+				RTE_PTR_ADD(&sc->port.old_nig_stats,
+				offsetof(struct nig_stats, egress_mac_pkt1_lo)), 2);
 	}
 
 	/* function stats */
diff --git a/drivers/net/bnx2x/bnx2x_vfpf.c b/drivers/net/bnx2x/bnx2x_vfpf.c
index 63953c2979..5411df3a38 100644
--- a/drivers/net/bnx2x/bnx2x_vfpf.c
+++ b/drivers/net/bnx2x/bnx2x_vfpf.c
@@ -52,9 +52,9 @@ bnx2x_check_bull(struct bnx2x_softc *sc)
 
 	/* check the mac address and VLAN and allocate memory if valid */
 	if (valid_bitmap & (1 << MAC_ADDR_VALID) && memcmp(bull->mac, sc->old_bulletin.mac, ETH_ALEN))
-		rte_memcpy(&sc->link_params.mac_addr, bull->mac, ETH_ALEN);
+		memcpy(&sc->link_params.mac_addr, bull->mac, ETH_ALEN);
 	if (valid_bitmap & (1 << VLAN_VALID))
-		rte_memcpy(&bull->vlan, &sc->old_bulletin.vlan, RTE_VLAN_HLEN);
+		memcpy(&bull->vlan, &sc->old_bulletin.vlan, sizeof(bull->vlan));
 
 	sc->old_bulletin = *bull;
 
@@ -569,7 +569,7 @@ bnx2x_vf_set_mac(struct bnx2x_softc *sc, int set)
 
 	bnx2x_check_bull(sc);
 
-	rte_memcpy(query->filters[0].mac, sc->link_params.mac_addr, ETH_ALEN);
+	memcpy(query->filters[0].mac, sc->link_params.mac_addr, ETH_ALEN);
 
 	bnx2x_add_tlv(sc, query, query->first_tlv.tl.length,
 		      BNX2X_VF_TLV_LIST_END,
@@ -583,9 +583,9 @@ bnx2x_vf_set_mac(struct bnx2x_softc *sc, int set)
 	while (BNX2X_VF_STATUS_FAILURE == reply->status &&
 			bnx2x_check_bull(sc)) {
 		/* A new mac was configured by PF for us */
-		rte_memcpy(sc->link_params.mac_addr, sc->pf2vf_bulletin->mac,
+		memcpy(sc->link_params.mac_addr, sc->pf2vf_bulletin->mac,
 				ETH_ALEN);
-		rte_memcpy(query->filters[0].mac, sc->pf2vf_bulletin->mac,
+		memcpy(query->filters[0].mac, sc->pf2vf_bulletin->mac,
 				ETH_ALEN);
 
 		rc = bnx2x_do_req4pf(sc, sc->vf2pf_mbox_mapping.paddr);
@@ -622,10 +622,10 @@ bnx2x_vf_config_rss(struct bnx2x_softc *sc,
 		      BNX2X_VF_TLV_LIST_END,
 		      sizeof(struct channel_list_end_tlv));
 
-	rte_memcpy(query->rss_key, params->rss_key, sizeof(params->rss_key));
+	memcpy(query->rss_key, params->rss_key, sizeof(params->rss_key));
 	query->rss_key_size = T_ETH_RSS_KEY;
 
-	rte_memcpy(query->ind_table, params->ind_table, T_ETH_INDIRECTION_TABLE_SIZE);
+	memcpy(query->ind_table, params->ind_table, T_ETH_INDIRECTION_TABLE_SIZE);
 	query->ind_table_size = T_ETH_INDIRECTION_TABLE_SIZE;
 
 	query->rss_result_mask = params->rss_result_mask;
-- 
2.17.1