diff --git a/hardware/zeroplus-logic-cube/zeroplus.c b/hardware/zeroplus-logic-cube/zeroplus.c
index 27ce1dd9..e33de713 100644
--- a/hardware/zeroplus-logic-cube/zeroplus.c
+++ b/hardware/zeroplus-logic-cube/zeroplus.c
@@ -233,7 +233,7 @@ static struct sr_dev_inst *zp_open_dev(int dev_index)
 	struct sr_dev_inst *sdi;
 	libusb_device **devlist;
 	struct libusb_device_descriptor des;
-	int err, i;
+	int i;
 
 	if (!(sdi = sr_dev_inst_get(dev_insts, dev_index)))
 		return NULL;
@@ -244,7 +244,7 @@ static struct sr_dev_inst *zp_open_dev(int dev_index)
 		libusb_get_device_list(usb_context, &devlist);
 		for (i = 0; devlist[i]; i++) {
 			/* TODO: Error handling. */
-			err = opendev4(&sdi, devlist[i], &des);
+			opendev4(&sdi, devlist[i], &des);
 		}
 	} else {
 		/* Status must be SR_ST_ACTIVE, i.e. already in use... */
diff --git a/input/chronovu_la8.c b/input/chronovu_la8.c
index 1ecb6fb7..af6a80c7 100644
--- a/input/chronovu_la8.c
+++ b/input/chronovu_la8.c
@@ -154,7 +154,7 @@ static int loadfile(struct sr_input *in, const char *filename)
 	for (i = 0; i < NUM_PACKETS; i++) {
 		/* TODO: Handle errors, handle incomplete reads. */
 		size = read(fd, buf, PACKET_SIZE);
-		logic.length = PACKET_SIZE;
+		logic.length = size;
 		sr_session_bus(in->vdev, &packet);
 	}
 	close(fd); /* FIXME */
diff --git a/output/chronovu_la8.c b/output/chronovu_la8.c
index 91ad56e6..75881195 100644
--- a/output/chronovu_la8.c
+++ b/output/chronovu_la8.c
@@ -86,7 +86,6 @@ static int init(struct sr_output *o)
 	struct context *ctx;
 	struct sr_probe *probe;
 	GSList *l;
-	int num_probes;
 	uint64_t samplerate;
 
 	if (!o) {
@@ -111,7 +110,7 @@ static int init(struct sr_output *o)
 
 	o->internal = ctx;
 
-	/* Get the number of probes, their names, and the unitsize. */
+	/* Get the probe names and the unitsize. */
 	/* TODO: Error handling. */
 	for (l = o->dev->probes; l; l = l->next) {
 		probe = l->data;
@@ -122,8 +121,6 @@ static int init(struct sr_output *o)
 	ctx->probelist[ctx->num_enabled_probes] = 0;
 	ctx->unitsize = (ctx->num_enabled_probes + 7) / 8;
 
-	num_probes = g_slist_length(o->dev->probes);
-
 	if (sr_dev_has_hwcap(o->dev, SR_HWCAP_SAMPLERATE)) {
 		samplerate = *((uint64_t *) o->dev->plugin->dev_info_get(
 				o->dev->plugin_index, SR_DI_CUR_SAMPLERATE));
diff --git a/output/gnuplot.c b/output/gnuplot.c
index ecbc027b..c150a2fb 100644
--- a/output/gnuplot.c
+++ b/output/gnuplot.c
@@ -148,8 +148,6 @@ static int init(struct sr_output *o)
 static int event(struct sr_output *o, int event_type, char **data_out,
 		 uint64_t *length_out)
 {
-	struct context *ctx;
-
 	if (!o) {
 		sr_err("gnuplot out: %s: o was NULL", __func__);
 		return SR_ERR_ARG;
@@ -165,8 +163,6 @@ static int event(struct sr_output *o, int event_type, char **data_out,
 		return SR_ERR_ARG;
 	}
 
-	ctx = o->internal;
-
 	switch (event_type) {
 	case SR_DF_TRIGGER:
 		/* TODO: Can a trigger mark be in a gnuplot data file? */
diff --git a/output/vcd.c b/output/vcd.c
index 7ceb0bae..119a3774 100644
--- a/output/vcd.c
+++ b/output/vcd.c
@@ -138,10 +138,8 @@ static int init(struct sr_output *o)
 static int event(struct sr_output *o, int event_type, char **data_out,
 		 uint64_t *length_out)
 {
-	struct context *ctx;
 	char *outbuf;
 
-	ctx = o->internal;
 	switch (event_type) {
 	case SR_DF_END:
 		outbuf = g_strdup("$dumpoff\n$end\n");
diff --git a/session_file.c b/session_file.c
index 259472e5..d11ccebd 100644
--- a/session_file.c
+++ b/session_file.c
@@ -46,7 +46,6 @@ SR_API int sr_session_load(const char *filename)
 	struct zip *archive;
 	struct zip_file *zf;
 	struct zip_stat zs;
-	struct sr_session *session;
 	struct sr_dev *dev;
 	struct sr_probe *probe;
 	int ret, err, probenum, devcnt, i, j;
@@ -98,7 +97,7 @@ SR_API int sr_session_load(const char *filename)
 		return SR_ERR;
 	}
 
-	session = sr_session_new();
+	sr_session_new();
 
 	devcnt = 0;
 	capturefiles = g_ptr_array_new_with_free_func(g_free);