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 f24f8a2073d97d4673ceed106deddce9cf758baf..abac23741057142f6fc789e7abc6a17a0ff4cba1 100644 (file)
--- a/drivers/tty/serial/bfin_uart.c
+++ b/drivers/tty/serial/bfin_uart.c
@@ -119,12 +119,10 @@ static irqreturn_t bfin_serial_mctrl_cts_int(int irq, void *dev_id)
        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 @@ static void bfin_serial_start_tx(struct uart_port *port)
        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 @@ static irqreturn_t bfin_serial_tx_int(int irq, void *dev_id)
 {
        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 @@ static irqreturn_t bfin_serial_dma_tx_int(int irq, void *dev_id)
        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);