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Explicitly ignore return value or bare expression (macro expands to a number) 

Compile: lwip_stack.c
In file included from ../features/FEATURE_LWIP/lwip-interface/lwip_stack.c:41:0:
../features/FEATURE_LWIP/lwip-interface/lwip_stack.c: In function 'mbed_lwip_bringup_2':
../features/FEATURE_LWIP/lwip-interface/ppp_lwip.h:58:44: warning: statement with no effect [-Wunused-value]
 #define ppp_lwip_disconnect()              ERR_IF
                                            ^
../features/FEATURE_LWIP/lwip-interface/lwip_stack.c:858:21: note: in expansion of macro 'ppp_lwip_disconnect'
                     ppp_lwip_disconnect();
                     ^~~~~~~~~~~~~~~~~~~
../features/FEATURE_LWIP/lwip-interface/ppp_lwip.h:58:44: warning: statement with no effect [-Wunused-value]
 #define ppp_lwip_disconnect()              ERR_IF
                                            ^
../features/FEATURE_LWIP/lwip-interface/lwip_stack.c:875:21: note: in expansion of macro 'ppp_lwip_disconnect'
                     ppp_lwip_disconnect();

                     ^~~~~~~~~~~~~~~~~~~
pull/6614/head
Paul Thompson 2018-04-11 14:12:55 -07:00
parent a463b075db
commit 449541c464
1 changed files with 2 additions and 2 deletions
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4
features/FEATURE_LWIP/lwip-interface/lwip_stack.c
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@ -855,7 +855,7 @@ nsapi_error_t mbed_lwip_bringup_2(bool dhcp, bool ppp, const char *ip, const cha
if (lwip_blocking) {
if (sys_arch_sem_wait(&lwip_netif_linked, 15000) == SYS_ARCH_TIMEOUT) {
if (ppp) {
ppp_lwip_disconnect();
(void)ppp_lwip_disconnect();
}
return NSAPI_ERROR_NO_CONNECTION;
}
@ -872,7 +872,7 @@ nsapi_error_t mbed_lwip_bringup_2(bool dhcp, bool ppp, const char *ip, const cha
if (!mbed_lwip_get_ip_addr(true, &lwip_netif)) {
if (sys_arch_sem_wait(&lwip_netif_has_any_addr, DHCP_TIMEOUT * 1000) == SYS_ARCH_TIMEOUT) {
if (ppp) {
ppp_lwip_disconnect();
(void)ppp_lwip_disconnect();
}
return NSAPI_ERROR_DHCP_FAILURE;
}