tty: serial: imx: remove dead code imx_dma_rxint

Since commit 4dec2f119e86 ("imx-serial: RX DMA startup latency")
the interrupt routine no longer will start rx dma.

imx_dma_rxint no longer needs to be called to try and start dma.
It won't start dma because dma_is_rxing is
already true meaning dma is already started.

Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
index bf3e981e26a29dbb6a48d3090de200bad65f0e74..1b04ef5925efcac5a985d2afde523f60e51eb5e8 100644 (file)
--- a/drivers/tty/serial/imx.c
+++ b/drivers/tty/serial/imx.c
@@ -732,29 +732,6 @@ static void imx_disable_rx_int(struct imx_port *sport)
 }
 
 static void clear_rx_errors(struct imx_port *sport);
-static int start_rx_dma(struct imx_port *sport);
-/*
- * If the RXFIFO is filled with some data, and then we
- * arise a DMA operation to receive them.
- */
-static void imx_dma_rxint(struct imx_port *sport)
-{
-       unsigned long temp;
-       unsigned long flags;
-
-       spin_lock_irqsave(&sport->port.lock, flags);
-
-       temp = readl(sport->port.membase + USR2);
-       if ((temp & USR2_RDR) && !sport->dma_is_rxing) {
-
-               imx_disable_rx_int(sport);
-
-               /* tell the DMA to receive the data. */
-               start_rx_dma(sport);
-       }
-
-       spin_unlock_irqrestore(&sport->port.lock, flags);
-}
 
 /*
  * We have a modem side uart, so the meanings of RTS and CTS are inverted.
@@ -816,11 +793,8 @@ static irqreturn_t imx_int(int irq, void *dev_id)
        sts = readl(sport->port.membase + USR1);
        sts2 = readl(sport->port.membase + USR2);
 
-       if (sts & (USR1_RRDY | USR1_AGTIM)) {
-               if (sport->dma_is_enabled)
-                       imx_dma_rxint(sport);
-               else
-                       imx_rxint(irq, dev_id);
+       if (!sport->dma_is_enabled && (sts & (USR1_RRDY | USR1_AGTIM))) {
+               imx_rxint(irq, dev_id);
                ret = IRQ_HANDLED;
        }