norma-dmm: Make serial write call block.

This call is executed from an event handler and was previously nonblocking,
but has no partial write handling. It sends a short packet so should be OK
to block, most likely the output buffer will be empty anyway.

diff --git a/src/hardware/norma-dmm/protocol.c b/src/hardware/norma-dmm/protocol.c
index 522d88a1749451c62fc1f0d9f527e656e1f7eaa5..035e991e8f1d40db9544acc531fc99bef4b8623a 100644 (file)
--- a/src/hardware/norma-dmm/protocol.c
+++ b/src/hardware/norma-dmm/protocol.c
@@ -48,9 +48,8 @@ static int nma_send_req(const struct sr_dev_inst *sdi, int req, char *params)
        devc->last_req = req;
        devc->last_req_pending = TRUE;
 
-       if (serial_write(serial, buf, len) == -1) {
-               sr_err("Unable to send request: %d %s.",
-                       errno, strerror(errno));
+       if (serial_write_blocking(serial, buf, len) < 0) {
+               sr_err("Unable to send request.");
                devc->last_req_pending = FALSE;
                return SR_ERR;
        }