bcm27xx: remove linux 5.10 compatibility

[openwrt/staging/chunkeey.git] / target / linux / bcm27xx / patches-5.10 / 950-0033-amba_pl011-Insert-mb-for-correct-FIFO-handling.patch

diff --git a/target/linux/bcm27xx/patches-5.10/950-0033-amba_pl011-Insert-mb-for-correct-FIFO-handling.patch b/target/linux/bcm27xx/patches-5.10/950-0033-amba_pl011-Insert-mb-for-correct-FIFO-handling.patch
deleted file mode 100644 (file)
index 8a341f2..0000000
--- a/target/linux/bcm27xx/patches-5.10/950-0033-amba_pl011-Insert-mb-for-correct-FIFO-handling.patch
+++ /dev/null
@@ -1,27 +0,0 @@
-From f44d321993ccf1707f5774dc443b900adae5d9d5 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
-@@ -1377,6 +1377,7 @@ 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;