app: Do not call LOG_PANIC() with reset or shutdown

Calling LOG_PANIC() can lead to RTT trace corruption
and assert as the RTT trace is intended to be sent
only from logging thread.

This was observed with full modem FOTA.

Signed-off-by: Markus Lassila <markus.lassila@nordicsemi.no>
(cherry picked from commit 5945158)

Author: MarkusLassila

app/src/main.c

@@ -289,7 +289,7 @@ static int sm_main(void)
 	return ret;
 
 exit_reboot:
-	LOG_PANIC();
+	log_flush();
 	sys_reboot(SYS_REBOOT_COLD);
 }
 SYS_INIT(sm_main, APPLICATION, 100);

app/src/sm_at_commands.c

@@ -141,7 +141,6 @@ static void sm_shutdown(void)
 {
 	sm_at_host_uninit();
 	sm_power_off_modem();
-	LOG_PANIC();
 	sm_ctrl_pin_enter_shutdown();
 }
 
@@ -160,7 +159,7 @@ FUNC_NORETURN void sm_reset(void)
 {
 	sm_at_host_uninit();
 	sm_power_off_modem();
-	LOG_PANIC();
+	log_flush();
 	sys_reboot(SYS_REBOOT_COLD);
 }
 

app/src/sm_at_dfu.c

@@ -312,7 +312,7 @@ static int handle_at_xdfu_init(enum at_parser_cmd_type cmd_type, struct at_parse
 
 			(void)set_full_mfw_dfu_segment_type(DFU_FULL_MFW_SEGMENT_BOOTLOADER);
 
-			LOG_PANIC();
+			log_flush();
 			sys_reboot(SYS_REBOOT_COLD);
 		default:
 			LOG_ERR("Invalid target type: %d", type);
@@ -566,7 +566,7 @@ static int handle_at_xdfu_apply(enum at_parser_cmd_type cmd_type, struct at_pars
 					(void)set_full_mfw_dfu_segment_type(
 						DFU_FULL_MFW_SEGMENT_BOOTLOADER);
 					LOG_INF("Firmware update successful, rebooting...");
-					LOG_PANIC();
+					log_flush();
 					sys_reboot(SYS_REBOOT_COLD);
 				}
 			}

app/src/sm_at_fota.c

@@ -529,7 +529,7 @@ FUNC_NORETURN static void handle_full_fota_activation_fail(int ret)
 		LOG_INF("External flash erase succeeded");
 
 	LOG_WRN("Rebooting...");
-	LOG_PANIC();
+	log_flush();
 	sys_reboot(SYS_REBOOT_COLD);
 }
 

app/src/sm_at_host.c

@@ -1084,7 +1084,6 @@ static void handle_bootloader_at_cmd(uint8_t *buf, size_t buf_size, char *at_cmd
 		}
 	} else if (strncasecmp(at_cmd, AT_XRESET_CMD, sizeof(AT_XRESET_CMD) - 1) == 0) {
 		LOG_INF("Rebooting device via %s command", AT_XRESET_CMD);
-		LOG_PANIC();
 		final_call(sm_reset);
 	} else {
 		LOG_ERR("AT command not supported in bootloader mode: %s", at_cmd);

app/src/sm_ctrl_pin.c

@@ -101,7 +101,7 @@ void sm_ctrl_pin_enter_sleep_no_uninit(bool at_host_power_off)
 	}
 
 	LOG_INF("Entering sleep. No uninit.");
-	LOG_PANIC();
+	log_flush();
 
 	k_sleep(K_MSEC(100));
 
@@ -155,6 +155,7 @@ void sm_ctrl_pin_enter_idle(void)
 void sm_ctrl_pin_enter_shutdown(void)
 {
 	LOG_INF("Entering shutdown.");
+	log_flush();
 	k_sleep(K_MSEC(100));
 
 	nrf_regulators_system_off(NRF_REGULATORS_NS);