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

2025-06-05 22:19:21 +02:00 · 2024-03-01 07:54:30 +00:00
parent 24a7b5beb1
commit aa79231bf0
239 changed files with 803 additions and 1351 deletions
--- a/buildroot-external/patches/linux/0074-serial-pxa-Use-port-lock-wrappers.patch
+++ b/buildroot-external/patches/linux/0074-serial-pxa-Use-port-lock-wrappers.patch
@@ -0,0 +1,155 @@
+From 2c8fbdf011421d0e63a7c1d116fd4ad727fb9b5e Mon Sep 17 00:00:00 2001
+From: Thomas Gleixner <tglx@linutronix.de>
+Date: Thu, 14 Sep 2023 20:44:05 +0206
+Subject: [PATCH 074/196] serial: pxa: 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/20230914183831.587273-49-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/pxa.c | 30 +++++++++++++++---------------
+ 1 file changed, 15 insertions(+), 15 deletions(-)
+
+diff --git a/drivers/tty/serial/pxa.c b/drivers/tty/serial/pxa.c
+index 73c60f5ea027..46e70e155aab 100644
+--- a/drivers/tty/serial/pxa.c
+++ b/drivers/tty/serial/pxa.c
+@@ -225,14 +225,14 @@ static inline irqreturn_t serial_pxa_irq(int irq, void *dev_id)
+ 	iir = serial_in(up, UART_IIR);
+ 	if (iir & UART_IIR_NO_INT)
+ 		return IRQ_NONE;
+-	spin_lock(&up->port.lock);
+	uart_port_lock(&up->port);
+ 	lsr = serial_in(up, UART_LSR);
+ 	if (lsr & UART_LSR_DR)
+ 		receive_chars(up, &lsr);
+ 	check_modem_status(up);
+ 	if (lsr & UART_LSR_THRE)
+ 		transmit_chars(up);
+-	spin_unlock(&up->port.lock);
+	uart_port_unlock(&up->port);
+ 	return IRQ_HANDLED;
+ }
+ 
+@@ -242,9 +242,9 @@ static unsigned int serial_pxa_tx_empty(struct uart_port *port)
+ 	unsigned long flags;
+ 	unsigned int ret;
+ 
+-	spin_lock_irqsave(&up->port.lock, flags);
+	uart_port_lock_irqsave(&up->port, &flags);
+ 	ret = serial_in(up, UART_LSR) & UART_LSR_TEMT ? TIOCSER_TEMT : 0;
+-	spin_unlock_irqrestore(&up->port.lock, flags);
+	uart_port_unlock_irqrestore(&up->port, flags);
+ 
+ 	return ret;
+ }
+@@ -295,13 +295,13 @@ static void serial_pxa_break_ctl(struct uart_port *port, int break_state)
+ 	struct uart_pxa_port *up = (struct uart_pxa_port *)port;
+ 	unsigned long flags;
+ 
+-	spin_lock_irqsave(&up->port.lock, flags);
+	uart_port_lock_irqsave(&up->port, &flags);
+ 	if (break_state == -1)
+ 		up->lcr |= UART_LCR_SBC;
+ 	else
+ 		up->lcr &= ~UART_LCR_SBC;
+ 	serial_out(up, UART_LCR, up->lcr);
+-	spin_unlock_irqrestore(&up->port.lock, flags);
+	uart_port_unlock_irqrestore(&up->port, flags);
+ }
+ 
+ static int serial_pxa_startup(struct uart_port *port)
+@@ -346,10 +346,10 @@ static int serial_pxa_startup(struct uart_port *port)
+ 	 */
+ 	serial_out(up, UART_LCR, UART_LCR_WLEN8);
+ 
+-	spin_lock_irqsave(&up->port.lock, flags);
+	uart_port_lock_irqsave(&up->port, &flags);
+ 	up->port.mctrl |= TIOCM_OUT2;
+ 	serial_pxa_set_mctrl(&up->port, up->port.mctrl);
+-	spin_unlock_irqrestore(&up->port.lock, flags);
+	uart_port_unlock_irqrestore(&up->port, flags);
+ 
+ 	/*
+ 	 * Finally, enable interrupts.  Note: Modem status interrupts
+@@ -383,10 +383,10 @@ static void serial_pxa_shutdown(struct uart_port *port)
+ 	up->ier = 0;
+ 	serial_out(up, UART_IER, 0);
+ 
+-	spin_lock_irqsave(&up->port.lock, flags);
+	uart_port_lock_irqsave(&up->port, &flags);
+ 	up->port.mctrl &= ~TIOCM_OUT2;
+ 	serial_pxa_set_mctrl(&up->port, up->port.mctrl);
+-	spin_unlock_irqrestore(&up->port.lock, flags);
+	uart_port_unlock_irqrestore(&up->port, flags);
+ 
+ 	/*
+ 	 * Disable break condition and FIFOs
+@@ -434,7 +434,7 @@ serial_pxa_set_termios(struct uart_port *port, struct ktermios *termios,
+ 	 * Ok, we're now changing the port state.  Do it with
+ 	 * interrupts disabled.
+ 	 */
+-	spin_lock_irqsave(&up->port.lock, flags);
+	uart_port_lock_irqsave(&up->port, &flags);
+ 
+ 	/*
+ 	 * Ensure the port will be enabled.
+@@ -504,7 +504,7 @@ serial_pxa_set_termios(struct uart_port *port, struct ktermios *termios,
+ 	up->lcr = cval;					/* Save LCR */
+ 	serial_pxa_set_mctrl(&up->port, up->port.mctrl);
+ 	serial_out(up, UART_FCR, fcr);
+-	spin_unlock_irqrestore(&up->port.lock, flags);
+	uart_port_unlock_irqrestore(&up->port, flags);
+ }
+ 
+ static void
+@@ -608,9 +608,9 @@ serial_pxa_console_write(struct console *co, const char *s, unsigned int count)
+ 	if (up->port.sysrq)
+ 		locked = 0;
+ 	else if (oops_in_progress)
+-		locked = spin_trylock(&up->port.lock);
+		locked = uart_port_trylock(&up->port);
+ 	else
+-		spin_lock(&up->port.lock);
+		uart_port_lock(&up->port);
+ 
+ 	/*
+ 	 *	First save the IER then disable the interrupts
+@@ -628,7 +628,7 @@ serial_pxa_console_write(struct console *co, const char *s, unsigned int count)
+ 	serial_out(up, UART_IER, ier);
+ 
+ 	if (locked)
+-		spin_unlock(&up->port.lock);
+		uart_port_unlock(&up->port);
+ 	local_irq_restore(flags);
+ 	clk_disable(up->clk);
+ 
+-- 
+2.43.2
+