Fix a few "value never read" scan-build warnings.

[libsigrok.git] / src / hardware / openbench-logic-sniffer / api.c

diff --git a/src/hardware/openbench-logic-sniffer/api.c b/src/hardware/openbench-logic-sniffer/api.c
index 07bb2eed19383d42529854deec1e0c46c7169ffc..e61bd10d394e034bc97fcb951b2663b3ed8ce0a4 100644 (file)
--- a/src/hardware/openbench-logic-sniffer/api.c
+++ b/src/hardware/openbench-logic-sniffer/api.c
@@ -17,8 +17,8 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#include <config.h>
 #include "protocol.h"
-#include <libserialport.h>
 
 #define SERIALCOMM "115200/8n1"
 
@@ -70,11 +70,10 @@ static const char *patterns[] = {
 };
 
 /* Channels are numbered 0-31 (on the PCB silkscreen). */
-SR_PRIV const char *ols_channel_names[NUM_CHANNELS + 1] = {
+SR_PRIV const char *ols_channel_names[] = {
        "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12",
        "13", "14", "15", "16", "17", "18", "19", "20", "21", "22", "23",
        "24", "25", "26", "27", "28", "29", "30", "31",
-       NULL,
 };
 
 /* Default supported samplerates, can be overridden by device metadata. */
@@ -84,29 +83,28 @@ static const uint64_t samplerates[] = {
        SR_HZ(1),
 };
 
+#define RESPONSE_DELAY_US (10 * 1000)
+
 SR_PRIV struct sr_dev_driver ols_driver_info;
-static struct sr_dev_driver *di = &ols_driver_info;
 
-static int init(struct sr_context *sr_ctx)
+static int init(struct sr_dev_driver *di, struct sr_context *sr_ctx)
 {
        return std_init(sr_ctx, di, LOG_PREFIX);
 }
 
-static GSList *scan(GSList *options)
+static GSList *scan(struct sr_dev_driver *di, GSList *options)
 {
        struct sr_config *src;
        struct sr_dev_inst *sdi;
        struct drv_context *drvc;
-       struct dev_context *devc;
-       struct sr_channel *ch;
        struct sr_serial_dev_inst *serial;
-       GPollFD probefd;
        GSList *l, *devices;
-       int ret, i;
+       int ret;
+       unsigned int i;
        const char *conn, *serialcomm;
        char buf[8];
 
-       drvc = di->priv;
+       drvc = di->context;
 
        devices = NULL;
 
@@ -125,7 +123,7 @@ static GSList *scan(GSList *options)
        if (!conn)
                return NULL;
 
-       if (serialcomm == NULL)
+       if (!serialcomm)
                serialcomm = SERIALCOMM;
 
        serial = sr_serial_dev_inst_new(conn, serialcomm);
@@ -154,8 +152,7 @@ static GSList *scan(GSList *options)
        }
        send_shortcommand(serial, CMD_ID);
 
-       /* Wait 10ms for a response. */
-       g_usleep(10000);
+       g_usleep(RESPONSE_DELAY_US);
 
        if (sp_input_waiting(serial->data) == 0) {
                sr_dbg("Didn't get any reply.");
@@ -179,13 +176,11 @@ static GSList *scan(GSList *options)
         */
        send_shortcommand(serial, CMD_METADATA);
 
-       /* Wait 10ms for a response. */
-       g_usleep(10000);
+       g_usleep(RESPONSE_DELAY_US);
 
        if (sp_input_waiting(serial->data) != 0) {
                /* Got metadata. */
                sdi = get_metadata(serial);
-               devc = sdi->priv;
        } else {
                /* Not an OLS -- some other board that uses the sump protocol. */
                sr_info("Device does not support metadata.");
@@ -195,13 +190,10 @@ static GSList *scan(GSList *options)
                sdi->model = g_strdup("Logic Analyzer");
                sdi->version = g_strdup("v1.0");
                sdi->driver = di;
-               for (i = 0; i < 32; i++) {
-                       ch = sr_channel_new(i, SR_CHANNEL_LOGIC, TRUE,
+               for (i = 0; i < ARRAY_SIZE(ols_channel_names); i++)
+                       sr_channel_new(sdi, i, SR_CHANNEL_LOGIC, TRUE,
                                        ols_channel_names[i]);
-                       sdi->channels = g_slist_append(sdi->channels, ch);
-               }
-               devc = ols_dev_new();
-               sdi->priv = devc;
+               sdi->priv = ols_dev_new();
        }
        /* Configure samplerate and divider. */
        if (ols_set_samplerate(sdi, DEFAULT_SAMPLERATE) != SR_OK)
@@ -218,12 +210,12 @@ static GSList *scan(GSList *options)
        return devices;
 }
 
-static GSList *dev_list(void)
+static GSList *dev_list(const struct sr_dev_driver *di)
 {
-       return ((struct drv_context *)(di->priv))->instances;
+       return ((struct drv_context *)(di->context))->instances;
 }
 
-static int cleanup(void)
+static int cleanup(const struct sr_dev_driver *di)
 {
        return std_dev_clear(di, NULL);
 }
@@ -613,5 +605,5 @@ SR_PRIV struct sr_dev_driver ols_driver_info = {
        .dev_close = std_serial_dev_close,
        .dev_acquisition_start = dev_acquisition_start,
        .dev_acquisition_stop = dev_acquisition_stop,
-       .priv = NULL,
+       .context = NULL,
 };