drivers: Use serial_write_blocking() everywhere.

This fixes bug #962.

src/dmm/metex14.c

@@ -293,7 +293,7 @@ SR_PRIV int sr_metex14_packet_request(struct sr_serial_dev_inst *serial)
 
 	sr_spew("Requesting DMM packet.");
 
-	return (serial_write_nonblocking(serial, &wbuf, 1) == 1) ? SR_OK : SR_ERR;
+	return serial_write_blocking(serial, &wbuf, 1, 0);
 }
 #endif
 

src/hardware/cem-dt-885x/protocol.c

@@ -400,7 +400,7 @@ SR_PRIV int cem_dt_885x_receive_data(int fd, int revents, void *cb_data)
 			} else {
 				/* Tell device to start transferring from memory. */
 				cmd = CMD_TRANSFER_MEMORY;
-				serial_write_nonblocking(serial, &cmd, 1);
+				serial_write_blocking(serial, &cmd, 1, 0);
 			}
 		}
 	}
@@ -456,7 +456,7 @@ static int cem_dt_885x_toggle(const struct sr_dev_inst *sdi, uint8_t cmd,
 	 * only thing to do is wait for the token that will confirm
 	 * whether the command worked or not, and resend if needed. */
 	while (TRUE) {
-		if (serial_write_nonblocking(serial, (const void *)&cmd, 1) != 1)
+		if (serial_write_blocking(serial, (const void *)&cmd, 1, 0) < 0)
 			return SR_ERR;
 		if (wait_for_token(sdi, tokens, timeout) == SR_ERR)
 			return SR_ERR;
@@ -817,7 +817,7 @@ SR_PRIV int cem_dt_885x_power_off(const struct sr_dev_inst *sdi)
 	cmd = CMD_TOGGLE_POWER_OFF;
 	while (TRUE) {
 		serial_flush(serial);
-		if (serial_write_nonblocking(serial, (const void *)&cmd, 1) != 1)
+		if (serial_write_blocking(serial, (const void *)&cmd, 1, 0) < 0)
 			return SR_ERR;
 		/* It never takes more than 23ms for the next token to arrive. */
 		g_usleep(25 * 1000);

src/hardware/kern-scale/api.c

@@ -82,7 +82,7 @@ static GSList *scan(struct sr_dev_driver *di, GSList *options)
 	serial_flush(serial);
 
 	sr_spew("Set O1 mode (continuous values, stable and unstable ones).");
-	if (serial_write_nonblocking(serial, "O1\r\n", 4) != 4)
+	if (serial_write_blocking(serial, "O1\r\n", 4, 0) < 0)
 		goto scan_cleanup;
 	/* Device replies with "A00\r\n" (OK) or "E01\r\n" (Error). Ignore. */
 
@@ -140,7 +140,7 @@ static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 	serial = sdi->conn;
 
 	sr_spew("Set O1 mode (continuous values, stable and unstable ones).");
-	if (serial_write_nonblocking(serial, "O1\r\n", 4) != 4)
+	if (serial_write_blocking(serial, "O1\r\n", 4, 0) < 0)
 		return SR_ERR;
 	/* Device replies with "A00\r\n" (OK) or "E01\r\n" (Error). Ignore. */
 

src/hardware/pce-322a/protocol.c

@@ -32,10 +32,7 @@ static int send_command(const struct sr_dev_inst *sdi, uint16_t command)
 	if (!(serial = sdi->conn))
 		return SR_ERR;
 
-	if (serial_write_nonblocking(serial, (const void *)buffer, 2) != 2)
-		return SR_ERR;
-
-	return SR_OK;
+	return serial_write_blocking(serial, (const void *)buffer, 2, 0);
 }
 
 static int send_long_command(const struct sr_dev_inst *sdi, uint32_t command)
@@ -51,10 +48,7 @@ static int send_long_command(const struct sr_dev_inst *sdi, uint32_t command)
 	if (!(serial = sdi->conn))
 		return SR_ERR;
 
-	if (serial_write_nonblocking(serial, (const void *)buffer, 4) != 4)
-		return SR_ERR;
-
-	return SR_OK;
+	return serial_write_blocking(serial, (const void *)buffer, 4, 0);
 }
 
 static void send_data(const struct sr_dev_inst *sdi, float sample)

src/modbus/modbus_serial_rtu.c

@@ -109,18 +109,18 @@ static int modbus_serial_rtu_send(void *priv,
 	uint8_t slave_addr = modbus->slave_addr;
 	uint16_t crc;
 
-	result = serial_write_nonblocking(serial, &slave_addr, sizeof(slave_addr));
+	result = serial_write_blocking(serial, &slave_addr, sizeof(slave_addr), 0);
 	if (result < 0)
 		return result;
 
-	result = serial_write_nonblocking(serial, buffer, buffer_size);
+	result = serial_write_blocking(serial, buffer, buffer_size, 0);
 	if (result < 0)
 		return result;
 
 	crc = modbus_serial_rtu_crc(0xFFFF, &slave_addr, sizeof(slave_addr));
 	crc = modbus_serial_rtu_crc(crc, buffer, buffer_size);
 
-	result = serial_write_nonblocking(serial, &crc, sizeof(crc));
+	result = serial_write_blocking(serial, &crc, sizeof(crc), 0);
 	if (result < 0)
 		return result;
 

src/scpi/scpi_serial.c

@@ -117,21 +117,15 @@ static int scpi_serial_source_remove(struct sr_session *session, void *priv)
 
 static int scpi_serial_send(void *priv, const char *command)
 {
-	int len, result, written;
+	int result;
 	struct scpi_serial *sscpi = priv;
 	struct sr_serial_dev_inst *serial = sscpi->serial;
 
-	len = strlen(command);
-	written = 0;
-	while (written < len) {
-		result = serial_write_nonblocking(serial,
-				command + written, len - written);
+	result = serial_write_blocking(serial, command, strlen(command), 0);
 	if (result < 0) {
 		sr_err("Error while sending SCPI command: '%s'.", command);
 		return SR_ERR;
 	}
-		written += result;
-	}
 
 	sr_spew("Successfully sent SCPI command: '%s'.", command);