Adding debian version 6.6.15-2.debian/6.6.15-2

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 117 insertions, 0 deletions

diff --git a/debian/patches-rt/0052-serial-sa1100-Use-port-lock-wrappers.patch b/debian/patches-rt/0052-serial-sa1100-Use-port-lock-wrappers.patch
new file mode 100644
index 0000000000..2f8073a485
--- /dev/null
+++ b/debian/patches-rt/0052-serial-sa1100-Use-port-lock-wrappers.patch
@@ -0,0 +1,117 @@
+From: Thomas Gleixner <tglx@linutronix.de>
+Date: Thu, 14 Sep 2023 20:44:09 +0206
+Subject: [PATCH 052/134] serial: sa1100: Use port lock wrappers
+Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/6.6/older/patches-6.6.7-rt18.tar.xz
+
+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/20230914183831.587273-53-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/sa1100.c |   20 ++++++++++----------
+ 1 file changed, 10 insertions(+), 10 deletions(-)
+
+--- a/drivers/tty/serial/sa1100.c
++++ b/drivers/tty/serial/sa1100.c
+@@ -115,9 +115,9 @@ static void sa1100_timeout(struct timer_
+ 	unsigned long flags;
+ 
+ 	if (sport->port.state) {
+-		spin_lock_irqsave(&sport->port.lock, flags);
++		uart_port_lock_irqsave(&sport->port, &flags);
+ 		sa1100_mctrl_check(sport);
+-		spin_unlock_irqrestore(&sport->port.lock, flags);
++		uart_port_unlock_irqrestore(&sport->port, flags);
+ 
+ 		mod_timer(&sport->timer, jiffies + MCTRL_TIMEOUT);
+ 	}
+@@ -247,7 +247,7 @@ static irqreturn_t sa1100_int(int irq, v
+ 	struct sa1100_port *sport = dev_id;
+ 	unsigned int status, pass_counter = 0;
+ 
+-	spin_lock(&sport->port.lock);
++	uart_port_lock(&sport->port);
+ 	status = UART_GET_UTSR0(sport);
+ 	status &= SM_TO_UTSR0(sport->port.read_status_mask) | ~UTSR0_TFS;
+ 	do {
+@@ -276,7 +276,7 @@ static irqreturn_t sa1100_int(int irq, v
+ 		status &= SM_TO_UTSR0(sport->port.read_status_mask) |
+ 			  ~UTSR0_TFS;
+ 	} while (status & (UTSR0_TFS | UTSR0_RFS | UTSR0_RID));
+-	spin_unlock(&sport->port.lock);
++	uart_port_unlock(&sport->port);
+ 
+ 	return IRQ_HANDLED;
+ }
+@@ -321,14 +321,14 @@ static void sa1100_break_ctl(struct uart
+ 	unsigned long flags;
+ 	unsigned int utcr3;
+ 
+-	spin_lock_irqsave(&sport->port.lock, flags);
++	uart_port_lock_irqsave(&sport->port, &flags);
+ 	utcr3 = UART_GET_UTCR3(sport);
+ 	if (break_state == -1)
+ 		utcr3 |= UTCR3_BRK;
+ 	else
+ 		utcr3 &= ~UTCR3_BRK;
+ 	UART_PUT_UTCR3(sport, utcr3);
+-	spin_unlock_irqrestore(&sport->port.lock, flags);
++	uart_port_unlock_irqrestore(&sport->port, flags);
+ }
+ 
+ static int sa1100_startup(struct uart_port *port)
+@@ -354,9 +354,9 @@ static int sa1100_startup(struct uart_po
+ 	/*
+ 	 * Enable modem status interrupts
+ 	 */
+-	spin_lock_irq(&sport->port.lock);
++	uart_port_lock_irq(&sport->port);
+ 	sa1100_enable_ms(&sport->port);
+-	spin_unlock_irq(&sport->port.lock);
++	uart_port_unlock_irq(&sport->port);
+ 
+ 	return 0;
+ }
+@@ -423,7 +423,7 @@ sa1100_set_termios(struct uart_port *por
+ 
+ 	del_timer_sync(&sport->timer);
+ 
+-	spin_lock_irqsave(&sport->port.lock, flags);
++	uart_port_lock_irqsave(&sport->port, &flags);
+ 
+ 	sport->port.read_status_mask &= UTSR0_TO_SM(UTSR0_TFS);
+ 	sport->port.read_status_mask |= UTSR1_TO_SM(UTSR1_ROR);
+@@ -485,7 +485,7 @@ sa1100_set_termios(struct uart_port *por
+ 	if (UART_ENABLE_MS(&sport->port, termios->c_cflag))
+ 		sa1100_enable_ms(&sport->port);
+ 
+-	spin_unlock_irqrestore(&sport->port.lock, flags);
++	uart_port_unlock_irqrestore(&sport->port, flags);
+ }
+ 
+ static const char *sa1100_type(struct uart_port *port)