brcm2708: rename target to bcm27xx

[openwrt/openwrt.git] / target / linux / brcm2708 / patches-4.19 / 950-0035-amba_pl011-Insert-mb-for-correct-FIFO-handling.patch

diff --git a/target/linux/brcm2708/patches-4.19/950-0035-amba_pl011-Insert-mb-for-correct-FIFO-handling.patch b/target/linux/brcm2708/patches-4.19/950-0035-amba_pl011-Insert-mb-for-correct-FIFO-handling.patch
deleted file mode 100644 (file)
index 30ac2a8..0000000
--- a/target/linux/brcm2708/patches-4.19/950-0035-amba_pl011-Insert-mb-for-correct-FIFO-handling.patch
+++ /dev/null
@@ -1,27 +0,0 @@
-From 76627df3e5f0513118dac20710766f97fc5ca32d Mon Sep 17 00:00:00 2001
-From: Phil Elwell <phil@raspberrypi.org>
-Date: Fri, 29 Sep 2017 10:32:19 +0100
-Subject: [PATCH] amba_pl011: Insert mb() for correct FIFO handling
-
-The pl011 register accessor functions use the _relaxed versions of the
-standard readl() and writel() functions, meaning that there are no
-automatic memory barriers. When polling a FIFO status register to check
-for fullness, it is necessary to ensure that any outstanding writes have
-completed; otherwise the flags are effectively stale, making it possible
-that the next write is to a full FIFO.
-
-Signed-off-by: Phil Elwell <phil@raspberrypi.org>
----
- drivers/tty/serial/amba-pl011.c | 1 +
- 1 file changed, 1 insertion(+)
-
---- a/drivers/tty/serial/amba-pl011.c
-+++ b/drivers/tty/serial/amba-pl011.c
-@@ -1383,6 +1383,7 @@ static bool pl011_tx_char(struct uart_am
-               return false; /* unable to transmit character */
- 
-       pl011_write(c, uap, REG_DR);
-+      mb();
-       uap->port.icount.tx++;
- 
-       return true;