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[All] (testing) Bumpe kernel to 6.6.14

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j1nx
2024-02-05 16:41:40 +00:00
parent 4fc5231981
commit fffa51ff5f
231 changed files with 23132 additions and 8386 deletions
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76
buildroot-external/patches/linux/0097-serial-timbuart-Use-port-lock-wrappers.patch Normal file
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@@ -0,0 +1,76 @@
From 3a2ce0caeb2f2ea82d08f46db8c18fe27b1ab6ea Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 14 Sep 2023 20:44:27 +0206
Subject: [PATCH 097/195] serial: timbuart: Use port lock wrappers
When a serial port is used for kernel console output, then all
modifications to the UART registers which are done from other contexts,
e.g. getty, termios, are interference points for the kernel console.
So far this has been ignored and the printk output is based on the
principle of hope. The rework of the console infrastructure which aims to
support threaded and atomic consoles, requires to mark sections which
modify the UART registers as unsafe. This allows the atomic write function
to make informed decisions and eventually to restore operational state. It
also allows to prevent the regular UART code from modifying UART registers
while printk output is in progress.
All modifications of UART registers are guarded by the UART port lock,
which provides an obvious synchronization point with the console
infrastructure.
To avoid adding this functionality to all UART drivers, wrap the
spin_[un]lock*() invocations for uart_port::lock into helper functions
which just contain the spin_[un]lock*() invocations for now. In a
subsequent step these helpers will gain the console synchronization
mechanisms.
Converted with coccinelle. No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Link: https://lore.kernel.org/r/20230914183831.587273-71-john.ogness@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
drivers/tty/serial/timbuart.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/tty/serial/timbuart.c b/drivers/tty/serial/timbuart.c
index 0859394a78cd..0cc6524f5e8b 100644
--- a/drivers/tty/serial/timbuart.c
+++ b/drivers/tty/serial/timbuart.c
@@ -174,7 +174,7 @@ static void timbuart_tasklet(struct tasklet_struct *t)
struct timbuart_port *uart = from_tasklet(uart, t, tasklet);
u32 isr, ier = 0;
- spin_lock(&uart->port.lock);
+ uart_port_lock(&uart->port);
isr = ioread32(uart->port.membase + TIMBUART_ISR);
dev_dbg(uart->port.dev, "%s ISR: %x\n", __func__, isr);
@@ -189,7 +189,7 @@ static void timbuart_tasklet(struct tasklet_struct *t)
iowrite32(ier, uart->port.membase + TIMBUART_IER);
- spin_unlock(&uart->port.lock);
+ uart_port_unlock(&uart->port);
dev_dbg(uart->port.dev, "%s leaving\n", __func__);
}
@@ -295,10 +295,10 @@ static void timbuart_set_termios(struct uart_port *port,
tty_termios_copy_hw(termios, old);
tty_termios_encode_baud_rate(termios, baud, baud);
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
iowrite8((u8)bindex, port->membase + TIMBUART_BAUDRATE);
uart_update_timeout(port, termios->c_cflag, baud);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
static const char *timbuart_type(struct uart_port *port)
--
2.43.0