serial: pl011: (cosmetic) remove superfluous register write

In pl011_rx_chars() if pl011_dma_rx_trigger_dma() succeeds it will disable
the receive interrupt, no need to do this again.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c
index 182a922e1942235e278a53229f8c2635eba58461..ea6c2a3798ff9db94bb1502b6b80b8d08a6dd175 100644 (file)
--- a/drivers/tty/serial/amba-pl011.c
+++ b/drivers/tty/serial/amba-pl011.c
@@ -1214,8 +1214,8 @@ __acquires(&uap->port.lock)
                        dev_dbg(uap->port.dev, "could not trigger RX DMA job "
                                "fall back to interrupt mode again\n");
                        uap->im |= UART011_RXIM;
+                       writew(uap->im, uap->port.membase + UART011_IMSC);
                } else {
-                       uap->im &= ~UART011_RXIM;
 #ifdef CONFIG_DMA_ENGINE
                        /* Start Rx DMA poll */
                        if (uap->dmarx.poll_rate) {
@@ -1227,8 +1227,6 @@ __acquires(&uap->port.lock)
                        }
 #endif
                }
-
-               writew(uap->im, uap->port.membase + UART011_IMSC);
        }
        spin_lock(&uap->port.lock);
 }