rixty/OpenVoiceOS
1
1
Fork 0
mirror of https://github.com/OpenVoiceOS/OpenVoiceOS synced 2025-06-05 22:19:21 +02:00
Code Issues Releases Wiki Activity

[All] {WIP} The big bump to buildroot 2024.02.x

Browse Source
This commit is contained in:
j1nx
2024-03-01 07:54:30 +00:00
parent 24a7b5beb1
commit aa79231bf0
239 changed files with 803 additions and 1351 deletions
Download Patch File Download Diff File Expand all files Collapse all files

64
buildroot-external/patches/linux/0081-serial-sc16is7xx-Use-port-lock-wrappers.patch Normal file
View File

@ -0,0 +1,64 @@
From 2ec2be76520133c2703eb4997ac1215a8bdfb735 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 14 Sep 2023 20:44:12 +0206
Subject: [PATCH 081/196] serial: sc16is7xx: 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/20230914183831.587273-56-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/sc16is7xx.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/tty/serial/sc16is7xx.c b/drivers/tty/serial/sc16is7xx.c
index f75b8bceb8ca..2d7470457af4 100644
--- a/drivers/tty/serial/sc16is7xx.c
+++ b/drivers/tty/serial/sc16is7xx.c
@@ -804,6 +804,7 @@ static void sc16is7xx_tx_proc(struct kthread_work *ws)
{
struct uart_port *port = &(to_sc16is7xx_one(ws, tx_work)->port);
struct sc16is7xx_one *one = to_sc16is7xx_one(port, port);
+ unsigned long flags;
if ((port->rs485.flags & SER_RS485_ENABLED) &&
(port->rs485.delay_rts_before_send > 0))
@@ -812,6 +813,10 @@ static void sc16is7xx_tx_proc(struct kthread_work *ws)
mutex_lock(&one->efr_lock);
sc16is7xx_handle_tx(port);
mutex_unlock(&one->efr_lock);
+
+ uart_port_lock_irqsave(port, &flags);
+ sc16is7xx_ier_set(port, SC16IS7XX_IER_THRI_BIT);
+ uart_port_unlock_irqrestore(port, flags);
}
static void sc16is7xx_reconf_rs485(struct uart_port *port)
--
2.43.2