kernel: bump 5.15 to 5.15.56

[openwrt/staging/stintel.git] / target / linux / bcm27xx / patches-5.15 / 950-0060-tty-amba-pl011-Add-un-throttle-support.patch

diff --git a/target/linux/bcm27xx/patches-5.15/950-0060-tty-amba-pl011-Add-un-throttle-support.patch b/target/linux/bcm27xx/patches-5.15/950-0060-tty-amba-pl011-Add-un-throttle-support.patch
deleted file mode 100644 (file)
index 3b0bca7..0000000
--- a/target/linux/bcm27xx/patches-5.15/950-0060-tty-amba-pl011-Add-un-throttle-support.patch
+++ /dev/null
@@ -1,61 +0,0 @@
-From 48cb6ac7067b412c56a0a6aca43f5c964dfb7dec Mon Sep 17 00:00:00 2001
-From: Phil Elwell <phil@raspberrypi.org>
-Date: Fri, 24 Jan 2020 11:38:28 +0000
-Subject: [PATCH] tty: amba-pl011: Add un/throttle support
-
-The PL011 driver lacks throttle and unthrottle methods. As a result,
-sending more data to the Pi than it can immediately sink while CRTSCTS
-is enabled causes a NULL pointer to be followed.
-
-Add a throttle handler that disables the RX interrupts, and an
-unthrottle handler that reenables them.
-
-Signed-off-by: Phil Elwell <phil@raspberrypi.org>
----
- drivers/tty/serial/amba-pl011.c | 28 ++++++++++++++++++++++++++++
- 1 file changed, 28 insertions(+)
-
---- a/drivers/tty/serial/amba-pl011.c
-+++ b/drivers/tty/serial/amba-pl011.c
-@@ -1360,6 +1360,32 @@ static void pl011_start_tx(struct uart_p
-               pl011_start_tx_pio(uap);
- }
- 
-+static void pl011_throttle(struct uart_port *port)
-+{
-+      struct uart_amba_port *uap =
-+          container_of(port, struct uart_amba_port, port);
-+      unsigned long flags;
-+
-+      spin_lock_irqsave(&uap->port.lock, flags);
-+      uap->im &= ~(UART011_RTIM | UART011_RXIM);
-+      pl011_write(uap->im, uap, REG_IMSC);
-+      spin_unlock_irqrestore(&uap->port.lock, flags);
-+}
-+
-+static void pl011_unthrottle(struct uart_port *port)
-+{
-+      struct uart_amba_port *uap =
-+          container_of(port, struct uart_amba_port, port);
-+      unsigned long flags;
-+
-+      spin_lock_irqsave(&uap->port.lock, flags);
-+      uap->im |= UART011_RTIM;
-+      if (!pl011_dma_rx_running(uap))
-+          uap->im |= UART011_RXIM;
-+      pl011_write(uap->im, uap, REG_IMSC);
-+      spin_unlock_irqrestore(&uap->port.lock, flags);
-+}
-+
- static void pl011_stop_rx(struct uart_port *port)
- {
-       struct uart_amba_port *uap =
-@@ -2263,6 +2289,8 @@ static const struct uart_ops amba_pl011_
-       .stop_tx        = pl011_stop_tx,
-       .start_tx       = pl011_start_tx,
-       .stop_rx        = pl011_stop_rx,
-+      .throttle       = pl011_throttle,
-+      .unthrottle     = pl011_unthrottle,
-       .enable_ms      = pl011_enable_ms,
-       .break_ctl      = pl011_break_ctl,
-       .startup        = pl011_startup,