lldp: avoid compiler warnings in lldp_tfl_package_read* functions

gcc 5.1.1 wrongly warns about uninitialized variable @r2 when compiling
with "-Og". Refactor the code to avoid the warnings.

Fixes: 564cabd46c7c1532ad4d562bf8332eaed49ac201

diff --git a/src/libsystemd-network/lldp-tlv.c b/src/libsystemd-network/lldp-tlv.c
index 0851957ab4557ec35bb63fb8f4719fa155c1bfb8..3c54ea0c43c96cdd014c89e3301aaf0ec703bd62 100644 (file)
--- a/src/libsystemd-network/lldp-tlv.c
+++ b/src/libsystemd-network/lldp-tlv.c
@@ -387,12 +387,11 @@ static int lldp_tlv_packet_read_u16_tlv(tlv_packet *tlv, uint16_t type, uint16_t
 
         r = lldp_tlv_packet_enter_container(tlv, type);
         if (r < 0)
-                goto out;
+                return r;
 
         r = tlv_packet_read_u16(tlv, value);
         r2 = lldp_tlv_packet_exit_container(tlv);
 
- out:
         return r < 0 ? r : r2;
 }
 
@@ -429,18 +428,18 @@ int sd_lldp_packet_read_chassis_id(tlv_packet *tlv,
 
         r = lldp_tlv_packet_enter_container(tlv, LLDP_TYPE_CHASSIS_ID);
         if (r < 0)
-                goto out2;
+                return r;
 
         r = tlv_packet_read_u8(tlv, &subtype);
         if (r < 0)
-                goto out1;
+                goto out;
 
         switch (subtype) {
         case LLDP_CHASSIS_SUBTYPE_MAC_ADDRESS:
 
                 r = tlv_packet_read_bytes(tlv, data, length);
                 if (r < 0)
-                        goto out1;
+                        goto out;
 
                 break;
         default:
@@ -450,10 +449,9 @@ int sd_lldp_packet_read_chassis_id(tlv_packet *tlv,
 
         *type = subtype;
 
- out1:
+ out:
         r2 = lldp_tlv_packet_exit_container(tlv);
 
- out2:
         return r < 0 ? r : r2;
 }
 
@@ -469,11 +467,11 @@ int sd_lldp_packet_read_port_id(tlv_packet *tlv,
 
         r = lldp_tlv_packet_enter_container(tlv, LLDP_TYPE_PORT_ID);
         if (r < 0)
-                goto out2;
+                return r;
 
         r = tlv_packet_read_u8(tlv, &subtype);
         if (r < 0)
-                goto out1;
+                goto out;
 
         switch (subtype) {
         case LLDP_PORT_SUBTYPE_PORT_COMPONENT:
@@ -483,7 +481,7 @@ int sd_lldp_packet_read_port_id(tlv_packet *tlv,
 
                 r = tlv_packet_read_string(tlv, &s, length);
                 if (r < 0)
-                        goto out1;
+                        goto out;
 
                 *data = (uint8_t *) s;
 
@@ -492,7 +490,7 @@ int sd_lldp_packet_read_port_id(tlv_packet *tlv,
 
                 r = tlv_packet_read_bytes(tlv, data, length);
                 if (r < 0)
-                        goto out1;
+                        goto out;
 
                 break;
         default:
@@ -502,10 +500,9 @@ int sd_lldp_packet_read_port_id(tlv_packet *tlv,
 
         *type = subtype;
 
- out1:
+ out:
         r2 = lldp_tlv_packet_exit_container(tlv);
 
- out2:
         return r < 0 ? r : r2;
 }
 
@@ -542,12 +539,11 @@ int sd_lldp_packet_read_port_vlan_id(tlv_packet *tlv, uint16_t *id) {
 
         r = lldp_tlv_packet_enter_container_oui(tlv, LLDP_OUI_802_1, LLDP_OUI_SUBTYPE_802_1_PORT_VLAN_ID);
         if (r < 0)
-                goto out;
+                return r;
 
         r = tlv_packet_read_u16(tlv, id);
         r2 = lldp_tlv_packet_exit_container(tlv);
 
- out:
         return r < 0 ? r : r2;
 }
 
@@ -558,7 +554,7 @@ int sd_lldp_packet_read_port_protocol_vlan_id(sd_lldp_packet *tlv, uint8_t *flag
 
         r = lldp_tlv_packet_enter_container_oui(tlv, LLDP_OUI_802_1, LLDP_OUI_SUBTYPE_802_1_PORT_PROTOCOL_VLAN_ID);
         if (r < 0)
-                goto out;
+                return r;
 
         r = tlv_packet_read_u8(tlv, flags);
         if (r >= 0)
@@ -566,7 +562,6 @@ int sd_lldp_packet_read_port_protocol_vlan_id(sd_lldp_packet *tlv, uint8_t *flag
 
         r2 = lldp_tlv_packet_exit_container(tlv);
 
- out:
         return r < 0 ? r : r2;
 }
 
@@ -578,7 +573,7 @@ int sd_lldp_packet_read_vlan_name(tlv_packet *tlv, uint16_t *vlan_id, char **nam
 
         r = lldp_tlv_packet_enter_container_oui(tlv, LLDP_OUI_802_1, LLDP_OUI_SUBTYPE_802_1_VLAN_NAME);
         if (r < 0)
-                goto out;
+                return r;
 
         r = tlv_packet_read_u16(tlv, vlan_id);
         if (r >= 0)
@@ -591,7 +586,6 @@ int sd_lldp_packet_read_vlan_name(tlv_packet *tlv, uint16_t *vlan_id, char **nam
 
         r2 = lldp_tlv_packet_exit_container(tlv);
 
- out:
         return r < 0 ? r : r2;
 }
 
@@ -602,12 +596,11 @@ int sd_lldp_packet_read_management_vid(tlv_packet *tlv, uint16_t *id) {
 
         r = lldp_tlv_packet_enter_container_oui(tlv, LLDP_OUI_802_1, LLDP_OUI_SUBTYPE_802_1_MANAGEMENT_VID);
         if (r < 0)
-                goto out;
+                return r;
 
         r = tlv_packet_read_u16(tlv, id);
         r2 = lldp_tlv_packet_exit_container(tlv);
 
- out:
         return r < 0 ? r : r2;
 }
 
@@ -618,7 +611,7 @@ int sd_lldp_packet_read_link_aggregation(sd_lldp_packet *tlv, uint8_t *status, u
 
         r = lldp_tlv_packet_enter_container_oui(tlv, LLDP_OUI_802_1, LLDP_OUI_SUBTYPE_802_1_LINK_AGGREGATION);
         if (r < 0)
-                goto out;
+                return r;
 
         r = tlv_packet_read_u8(tlv, status);
         if (r >= 0)
@@ -626,7 +619,6 @@ int sd_lldp_packet_read_link_aggregation(sd_lldp_packet *tlv, uint8_t *status, u
 
         r2 = lldp_tlv_packet_exit_container(tlv);
 
- out:
         return r < 0 ? r : r2;
 }