modules: memfault: Read from offset when uploading modem traces

Use the nrf_modem_lib_trace_peek_at() API to read from the offset
that Memfault requests. This should improve recovery when upload
of a chunk fails for various reasons.

Signed-off-by: Jan Tore Guggedal <[email protected]>

Author: jtguggedal

modules/memfault-firmware-sdk/memfault_lte_coredump_modem_trace.c

@@ -124,13 +124,15 @@ static bool read_data_cb(uint32_t offset, void *buf, size_t buf_len)
 {
 	ARG_UNUSED(offset);
 
-	int err = nrf_modem_lib_trace_read(buf, buf_len);
+	int err = nrf_modem_lib_trace_peek_at(offset, buf, buf_len);
 
 	if (err == -ENODATA) {
-		LOG_WRN("No more modem trace data to read");
+		LOG_WRN("No more modem trace data to peek");
+
 		return false;
 	} else if (err < 0) {
-		LOG_ERR("Failed to read modem trace data: %d", err);
+		LOG_ERR("Failed to peek modem trace data: %d", err);
+
 		return false;
 	}