serial: bfin-uart: remove redundant CTS check for hardware CTS control.
Blackfin hardware CTS control generate interrupt for both CTS on and off.
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/tty/serial/bfin_uart.c b/drivers/tty/serial/bfin_uart.c
index f24f8a2..abac237 100644
--- a/drivers/tty/serial/bfin_uart.c
+++ b/drivers/tty/serial/bfin_uart.c
@@ -119,12 +119,10 @@
unsigned int status;
status = bfin_serial_get_mctrl(&uart->port);
- uart_handle_cts_change(&uart->port, status & TIOCM_CTS);
#ifdef CONFIG_SERIAL_BFIN_HARD_CTSRTS
- uart->scts = 1;
UART_CLEAR_SCTS(uart);
- UART_CLEAR_IER(uart, EDSSI);
#endif
+ uart_handle_cts_change(&uart->port, status & TIOCM_CTS);
return IRQ_HANDLED;
}
@@ -175,13 +173,6 @@
struct bfin_serial_port *uart = (struct bfin_serial_port *)port;
struct tty_struct *tty = uart->port.state->port.tty;
-#ifdef CONFIG_SERIAL_BFIN_HARD_CTSRTS
- if (uart->scts && !(bfin_serial_get_mctrl(&uart->port) & TIOCM_CTS)) {
- uart->scts = 0;
- uart_handle_cts_change(&uart->port, uart->scts);
- }
-#endif
-
/*
* To avoid losting RX interrupt, we reset IR function
* before sending data.
@@ -380,12 +371,6 @@
{
struct bfin_serial_port *uart = dev_id;
-#ifdef CONFIG_SERIAL_BFIN_HARD_CTSRTS
- if (uart->scts && !(bfin_serial_get_mctrl(&uart->port) & TIOCM_CTS)) {
- uart->scts = 0;
- uart_handle_cts_change(&uart->port, uart->scts);
- }
-#endif
spin_lock(&uart->port.lock);
if (UART_GET_LSR(uart) & THRE)
bfin_serial_tx_chars(uart);
@@ -531,13 +516,6 @@
struct bfin_serial_port *uart = dev_id;
struct circ_buf *xmit = &uart->port.state->xmit;
-#ifdef CONFIG_SERIAL_BFIN_HARD_CTSRTS
- if (uart->scts && !(bfin_serial_get_mctrl(&uart->port)&TIOCM_CTS)) {
- uart->scts = 0;
- uart_handle_cts_change(&uart->port, uart->scts);
- }
-#endif
-
spin_lock(&uart->port.lock);
if (!(get_dma_curr_irqstat(uart->tx_dma_channel)&DMA_RUN)) {
disable_dma(uart->tx_dma_channel);
