serial: pl011: use DMA RX polling by default

Making DMA RX polling optional when DMA is on was just
over-cautious: there is one single system in the kernel tree
using this facility, Ux500 and after some testing I turned
this on also for Ux500, which means it should simply be on
by default if DMA is enabled.

Cc: Jongsung Kim <neidhard.kim@lge.com>
Cc: Chanho Min <chanho.min@lge.com>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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 a183ace..c8cc8f0 100644 (file)
--- a/drivers/tty/serial/amba-pl011.c
+++ b/drivers/tty/serial/amba-pl011.c
@@ -325,7 +325,7 @@ static void pl011_dma_probe_initcall(struct device *dev, struct uart_amba_port *
                dmaengine_slave_config(chan, &rx_conf);
                uap->dmarx.chan = chan;
 
-               if (plat && plat->dma_rx_poll_enable) {
+               if (plat) {
                        /* Set poll rate if specified. */
                        if (plat->dma_rx_poll_rate) {
                                uap->dmarx.auto_poll_rate = false;

diff --git a/include/linux/amba/serial.h b/include/linux/amba/serial.h
index 0ddb5c0..0891ea0 100644 (file)
--- a/include/linux/amba/serial.h
+++ b/include/linux/amba/serial.h
@@ -203,7 +203,6 @@ struct amba_pl011_data {
        bool (*dma_filter)(struct dma_chan *chan, void *filter_param);
        void *dma_rx_param;
        void *dma_tx_param;
-       bool dma_rx_poll_enable;
        unsigned int dma_rx_poll_rate;
        unsigned int dma_rx_poll_timeout;
         void (*init) (void);