lecroy-xstream: 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/lecroy-xstream/protocol.c b/src/hardware/lecroy-xstream/protocol.c
index 9693c6d3404546c27ec4a216197cfb1f78e08146..a05ff618d5e4c8eeaa1877f6fc46b6ada7ac7875 100644 (file)
--- a/src/hardware/lecroy-xstream/protocol.c
+++ b/src/hardware/lecroy-xstream/protocol.c
@@ -435,6 +435,7 @@ SR_PRIV int lecroy_xstream_state_get(struct sr_dev_inst *sdi)
                }
                i++;
        }
+       g_free(tmp_str);
 
        if (!trig_source || scope_state_get_array_option(trig_source,
                        config->trigger_sources, config->num_trigger_sources,
@@ -448,6 +449,7 @@ SR_PRIV int lecroy_xstream_state_get(struct sr_dev_inst *sdi)
        if (scope_state_get_array_option(tmp_str, config->trigger_slopes,
                        config->num_trigger_slopes, &state->trigger_slope) != SR_OK)
                return SR_ERR;
+       g_free(tmp_str);
 
        if (sr_scpi_get_float(sdi->conn, "TRIG_DELAY?", &state->horiz_triggerpos) != SR_OK)
                return SR_ERR;
@@ -630,8 +632,6 @@ SR_PRIV int lecroy_xstream_receive_data(int fd, int revents, void *cb_data)
        (void)fd;
        (void)revents;
 
-       data = NULL;
-
        if (!(sdi = cb_data))
                return TRUE;
 
@@ -644,6 +644,7 @@ SR_PRIV int lecroy_xstream_receive_data(int fd, int revents, void *cb_data)
        if (ch->type != SR_CHANNEL_ANALOG)
                return SR_ERR;
 
+       data = NULL;
        if (sr_scpi_get_block(sdi->conn, NULL, &data) != SR_OK) {
                if (data)
                        g_byte_array_free(data, TRUE);
@@ -659,6 +660,7 @@ SR_PRIV int lecroy_xstream_receive_data(int fd, int revents, void *cb_data)
 
        if (analog.num_samples == 0) {
                g_free(analog.data);
+               g_byte_array_free(data, TRUE);
 
                /* No data available, we have to acquire data first. */
                g_snprintf(command, sizeof(command), "ARM;WAIT;*OPC;C%d:WAVEFORM?", ch->index + 1);
@@ -671,6 +673,7 @@ SR_PRIV int lecroy_xstream_receive_data(int fd, int revents, void *cb_data)
                if (state->sample_rate == 0)
                        if (lecroy_xstream_update_sample_rate(sdi, analog.num_samples) != SR_OK) {
                                g_free(analog.data);
+                               g_byte_array_free(data, TRUE);
                                return SR_ERR;
                        }
        }