imx6: fix DMA transaction errors

[openwrt/openwrt.git] / target / linux / imx6 / patches-4.14 / 210-disable-uart-dma.patch

diff --git a/target/linux/imx6/patches-4.14/210-disable-uart-dma.patch b/target/linux/imx6/patches-4.14/210-disable-uart-dma.patch
deleted file mode 100644 (file)
index 6abbb93..0000000
--- a/target/linux/imx6/patches-4.14/210-disable-uart-dma.patch
+++ /dev/null
@@ -1,23 +0,0 @@
-Based on following upstream patch by Tim Harvey (Gateworks):
-
-https://github.com/Gateworks/openwrt/commit/80a01b6582f94c4547f39d3a25e0a1e9b6eb9877
-
-TX complete DMA messages are getting missed.
-This is also currently an issue in mainline.
-For now we will disable DMA in serial/imx.c.
-
-This resolves an issue encountered with RS485 transmit.
-
---- a/drivers/tty/serial/imx.c
-+++ b/drivers/tty/serial/imx.c
-@@ -1268,10 +1268,6 @@ static int imx_startup(struct uart_port
- 
-       writel(temp & ~UCR4_DREN, sport->port.membase + UCR4);
- 
--      /* Can we enable the DMA support? */
--      if (!uart_console(port) && !sport->dma_is_inited)
--              imx_uart_dma_init(sport);
--
-       spin_lock_irqsave(&sport->port.lock, flags);
-       /* Reset fifo's and state machines */
-       i = 100;