scpi-dmm: free memory that was allocated by SCPI get routines

The SCPI get routines may allocate memory for response data which
callers have to free after use.

This addresses part of bug #1683.

diff --git a/src/hardware/scpi-dmm/protocol.c b/src/hardware/scpi-dmm/protocol.c
index 884ba6dcca2a77a337fb96a58d27cbd33473debf..279aadf56410cc78213c6d51361f4df8a129f1e1 100644 (file)
--- a/src/hardware/scpi-dmm/protocol.c
+++ b/src/hardware/scpi-dmm/protocol.c
@@ -100,8 +100,10 @@ SR_PRIV int scpi_dmm_get_mq(const struct sr_dev_inst *sdi,
        ret = sr_scpi_get_string(sdi->conn, command, &response);
        if (ret != SR_OK)
                return ret;
-       if (!response || !*response)
+       if (!response || !*response) {
+               g_free(response);
                return SR_ERR_NA;
+       }
        have = response;
        if (*have == '"')
                have++;