[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/0047-serial-atmel-Use-port-lock-wrappers.patch
+++ b/buildroot-external/patches/linux/0047-serial-atmel-Use-port-lock-wrappers.patch
@ -0,0 +1,124 @@
+From ad6ee8430287f4d453bdbe0870c897f3568cb50f Mon Sep 17 00:00:00 2001
+From: Thomas Gleixner <tglx@linutronix.de>
+Date: Thu, 14 Sep 2023 20:43:38 +0206
+Subject: [PATCH 047/196] serial: atmel: 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/20230914183831.587273-22-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/atmel_serial.c | 24 ++++++++++++------------
+ 1 file changed, 12 insertions(+), 12 deletions(-)
+
+diff --git a/drivers/tty/serial/atmel_serial.c b/drivers/tty/serial/atmel_serial.c
+index 88cdafa5ac54..1946fafc3f3e 100644
+--- a/drivers/tty/serial/atmel_serial.c
+++ b/drivers/tty/serial/atmel_serial.c
+@@ -861,7 +861,7 @@ static void atmel_complete_tx_dma(void *arg)
+ 	struct dma_chan *chan = atmel_port->chan_tx;
+ 	unsigned long flags;
+ 
+-	spin_lock_irqsave(&port->lock, flags);
+	uart_port_lock_irqsave(port, &flags);
+ 
+ 	if (chan)
+ 		dmaengine_terminate_all(chan);
+@@ -893,7 +893,7 @@ static void atmel_complete_tx_dma(void *arg)
+ 				  atmel_port->tx_done_mask);
+ 	}
+ 
+-	spin_unlock_irqrestore(&port->lock, flags);
+	uart_port_unlock_irqrestore(port, flags);
+ }
+ 
+ static void atmel_release_tx_dma(struct uart_port *port)
+@@ -1711,9 +1711,9 @@ static void atmel_tasklet_rx_func(struct tasklet_struct *t)
+ 	struct uart_port *port = &atmel_port->uart;
+ 
+ 	/* The interrupt handler does not take the lock */
+-	spin_lock(&port->lock);
+	uart_port_lock(port);
+ 	atmel_port->schedule_rx(port);
+-	spin_unlock(&port->lock);
+	uart_port_unlock(port);
+ }
+ 
+ static void atmel_tasklet_tx_func(struct tasklet_struct *t)
+@@ -1723,9 +1723,9 @@ static void atmel_tasklet_tx_func(struct tasklet_struct *t)
+ 	struct uart_port *port = &atmel_port->uart;
+ 
+ 	/* The interrupt handler does not take the lock */
+-	spin_lock(&port->lock);
+	uart_port_lock(port);
+ 	atmel_port->schedule_tx(port);
+-	spin_unlock(&port->lock);
+	uart_port_unlock(port);
+ }
+ 
+ static void atmel_init_property(struct atmel_uart_port *atmel_port,
+@@ -2175,7 +2175,7 @@ static void atmel_set_termios(struct uart_port *port,
+ 	} else
+ 		mode |= ATMEL_US_PAR_NONE;
+ 
+-	spin_lock_irqsave(&port->lock, flags);
+	uart_port_lock_irqsave(port, &flags);
+ 
+ 	port->read_status_mask = ATMEL_US_OVRE;
+ 	if (termios->c_iflag & INPCK)
+@@ -2377,22 +2377,22 @@ static void atmel_set_termios(struct uart_port *port,
+ 	else
+ 		atmel_disable_ms(port);
+ 
+-	spin_unlock_irqrestore(&port->lock, flags);
+	uart_port_unlock_irqrestore(port, flags);
+ }
+ 
+ static void atmel_set_ldisc(struct uart_port *port, struct ktermios *termios)
+ {
+ 	if (termios->c_line == N_PPS) {
+ 		port->flags |= UPF_HARDPPS_CD;
+-		spin_lock_irq(&port->lock);
+		uart_port_lock_irq(port);
+ 		atmel_enable_ms(port);
+-		spin_unlock_irq(&port->lock);
+		uart_port_unlock_irq(port);
+ 	} else {
+ 		port->flags &= ~UPF_HARDPPS_CD;
+ 		if (!UART_ENABLE_MS(port, termios->c_cflag)) {
+-			spin_lock_irq(&port->lock);
+			uart_port_lock_irq(port);
+ 			atmel_disable_ms(port);
+-			spin_unlock_irq(&port->lock);
+			uart_port_unlock_irq(port);
+ 		}
+ 	}
+ }
+-- 
+2.43.2
+