tty: serial: qcom-geni-serial: drop the return value from handle_rx

The return value of the handle_rx() callback is never checked. Drop it.
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Link: https://lore.kernel.org/r/20221229155030.418800-12-brgl@bgdev.plSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/qcom_geni_serial.c

@@ -114,7 +114,7 @@ struct qcom_geni_serial_port {
 	u32 tx_fifo_width;
 	u32 rx_fifo_depth;
 	bool setup;
-	int (*handle_rx)(struct uart_port *uport, u32 bytes, bool drop);
+	void (*handle_rx)(struct uart_port *uport, u32 bytes, bool drop);
 	unsigned int baud;
 	void *rx_fifo;
 	u32 loopback;
@@ -502,7 +502,7 @@ static void qcom_geni_serial_console_write(struct console *co, const char *s,
 		spin_unlock_irqrestore(&uport->lock, flags);
 }
 
-static int handle_rx_console(struct uart_port *uport, u32 bytes, bool drop)
+static void handle_rx_console(struct uart_port *uport, u32 bytes, bool drop)
 {
 	u32 i;
 	unsigned char buf[sizeof(u32)];
@@ -537,16 +537,15 @@ static int handle_rx_console(struct uart_port *uport, u32 bytes, bool drop)
 	}
 	if (!drop)
 		tty_flip_buffer_push(tport);
-	return 0;
 }
 #else
-static int handle_rx_console(struct uart_port *uport, u32 bytes, bool drop)
+static void handle_rx_console(struct uart_port *uport, u32 bytes, bool drop)
 {
-	return -EPERM;
+
 }
 #endif /* CONFIG_SERIAL_QCOM_GENI_CONSOLE */
 
-static int handle_rx_uart(struct uart_port *uport, u32 bytes, bool drop)
+static void handle_rx_uart(struct uart_port *uport, u32 bytes, bool drop)
 {
 	struct tty_port *tport;
 	struct qcom_geni_serial_port *port = to_dev_port(uport);
@@ -557,7 +556,7 @@ static int handle_rx_uart(struct uart_port *uport, u32 bytes, bool drop)
 	tport = &uport->state->port;
 	ioread32_rep(uport->membase + SE_GENI_RX_FIFOn, port->rx_fifo, words);
 	if (drop)
-		return 0;
+		return;
 
 	ret = tty_insert_flip_string(tport, port->rx_fifo, bytes);
 	if (ret != bytes) {
@@ -567,7 +566,6 @@ static int handle_rx_uart(struct uart_port *uport, u32 bytes, bool drop)
 	}
 	uport->icount.rx += ret;
 	tty_flip_buffer_push(tport);
-	return ret;
 }
 
 static unsigned int qcom_geni_serial_tx_empty(struct uart_port *uport)