Merge branch 'next' (accumulated 3.16 merge window patches) into master

Now that 3.15 is released, this merges the 'next' branch into 'master',
bringing us to the normal situation where my 'master' branch is the
merge window.

* accumulated work in next: (6809 commits)
  ufs: sb mutex merge + mutex_destroy
  powerpc: update comments for generic idle conversion
  cris: update comments for generic idle conversion
  idle: remove cpu_idle() forward declarations
  nbd: zero from and len fields in NBD_CMD_DISCONNECT.
  mm: convert some level-less printks to pr_*
  MAINTAINERS: adi-buildroot-devel is moderated
  MAINTAINERS: add linux-api for review of API/ABI changes
  mm/kmemleak-test.c: use pr_fmt for logging
  fs/dlm/debug_fs.c: replace seq_printf by seq_puts
  fs/dlm/lockspace.c: convert simple_str to kstr
  fs/dlm/config.c: convert simple_str to kstr
  mm: mark remap_file_pages() syscall as deprecated
  mm: memcontrol: remove unnecessary memcg argument from soft limit functions
  mm: memcontrol: clean up memcg zoneinfo lookup
  mm/memblock.c: call kmemleak directly from memblock_(alloc|free)
  mm/mempool.c: update the kmemleak stack trace for mempool allocations
  lib/radix-tree.c: update the kmemleak stack trace for radix tree allocations
  mm: introduce kmemleak_update_trace()
  mm/kmemleak.c: use %u to print ->checksum
  ...

1 files changed, 16 insertions, 23 deletions

diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
index 3b6c1a2e25d..e2f93874989 100644
--- a/drivers/tty/serial/imx.c
+++ b/drivers/tty/serial/imx.c
@@ -116,7 +116,7 @@
 #define UCR3_DSR	(1<<10) /* Data set ready */
 #define UCR3_DCD	(1<<9)	/* Data carrier detect */
 #define UCR3_RI		(1<<8)	/* Ring indicator */
-#define UCR3_TIMEOUTEN	(1<<7)	/* Timeout interrupt enable */
+#define UCR3_ADNIMP	(1<<7)	/* Autobaud Detection Not Improved */
 #define UCR3_RXDSEN	(1<<6)	/* Receive status interrupt enable */
 #define UCR3_AIRINTEN	(1<<5)	/* Async IR wake interrupt enable */
 #define UCR3_AWAKEN	(1<<4)	/* Async wake interrupt enable */
@@ -444,6 +444,10 @@ static void imx_stop_rx(struct uart_port *port)
 
 	temp = readl(sport->port.membase + UCR2);
 	writel(temp & ~UCR2_RXEN, sport->port.membase + UCR2);
+
+	/* disable the `Receiver Ready Interrrupt` */
+	temp = readl(sport->port.membase + UCR1);
+	writel(temp & ~UCR1_RRDYEN, sport->port.membase + UCR1);
 }
 
 /*
@@ -1070,7 +1074,7 @@ static void imx_disable_dma(struct imx_port *sport)
 static int imx_startup(struct uart_port *port)
 {
 	struct imx_port *sport = (struct imx_port *)port;
-	int retval;
+	int retval, i;
 	unsigned long flags, temp;
 
 	retval = clk_prepare_enable(sport->clk_per);
@@ -1098,17 +1102,15 @@ static int imx_startup(struct uart_port *port)
 
 	writel(temp & ~UCR4_DREN, sport->port.membase + UCR4);
 
-	if (USE_IRDA(sport)) {
-		/* reset fifo's and state machines */
-		int i = 100;
-		temp = readl(sport->port.membase + UCR2);
-		temp &= ~UCR2_SRST;
-		writel(temp, sport->port.membase + UCR2);
-		while (!(readl(sport->port.membase + UCR2) & UCR2_SRST) &&
-		    (--i > 0)) {
-			udelay(1);
-		}
-	}
+	/* Reset fifo's and state machines */
+	i = 100;
+
+	temp = readl(sport->port.membase + UCR2);
+	temp &= ~UCR2_SRST;
+	writel(temp, sport->port.membase + UCR2);
+
+	while (!(readl(sport->port.membase + UCR2) & UCR2_SRST) && (--i > 0))
+		udelay(1);
 
 	/*
 	 * Allocate the IRQ(s) i.MX1 has three interrupts whereas later
@@ -1163,18 +1165,9 @@ static int imx_startup(struct uart_port *port)
 		temp |= UCR2_IRTS;
 	writel(temp, sport->port.membase + UCR2);
 
-	if (USE_IRDA(sport)) {
-		/* clear RX-FIFO */
-		int i = 64;
-		while ((--i > 0) &&
-			(readl(sport->port.membase + URXD0) & URXD_CHARRDY)) {
-			barrier();
-		}
-	}
-
 	if (!is_imx1_uart(sport)) {
 		temp = readl(sport->port.membase + UCR3);
-		temp |= IMX21_UCR3_RXDMUXSEL;
+		temp |= IMX21_UCR3_RXDMUXSEL | UCR3_ADNIMP;
 		writel(temp, sport->port.membase + UCR3);
 	}