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, 71 insertions, 0 deletions

diff --git a/debian/patches-rt/0049-serial-qcom-geni-Use-port-lock-wrappers.patch b/debian/patches-rt/0049-serial-qcom-geni-Use-port-lock-wrappers.patch
new file mode 100644
index 0000000000..4f1bc6a1cb
--- /dev/null
+++ b/debian/patches-rt/0049-serial-qcom-geni-Use-port-lock-wrappers.patch
@@ -0,0 +1,71 @@
+From: Thomas Gleixner <tglx@linutronix.de>
+Date: Thu, 14 Sep 2023 20:44:06 +0206
+Subject: [PATCH 049/134] serial: qcom-geni: 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>
+Reviewed-by: Bjorn Andersson <quic_bjorande@quicinc.com>
+Signed-off-by: John Ogness <john.ogness@linutronix.de>
+Link: https://lore.kernel.org/r/20230914183831.587273-50-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/qcom_geni_serial.c |    8 ++++----
+ 1 file changed, 4 insertions(+), 4 deletions(-)
+
+--- a/drivers/tty/serial/qcom_geni_serial.c
++++ b/drivers/tty/serial/qcom_geni_serial.c
+@@ -482,9 +482,9 @@ static void qcom_geni_serial_console_wri
+ 
+ 	uport = &port->uport;
+ 	if (oops_in_progress)
+-		locked = spin_trylock_irqsave(&uport->lock, flags);
++		locked = uart_port_trylock_irqsave(uport, &flags);
+ 	else
+-		spin_lock_irqsave(&uport->lock, flags);
++		uart_port_lock_irqsave(uport, &flags);
+ 
+ 	geni_status = readl(uport->membase + SE_GENI_STATUS);
+ 
+@@ -520,7 +520,7 @@ static void qcom_geni_serial_console_wri
+ 		qcom_geni_serial_setup_tx(uport, port->tx_remaining);
+ 
+ 	if (locked)
+-		spin_unlock_irqrestore(&uport->lock, flags);
++		uart_port_unlock_irqrestore(uport, flags);
+ }
+ 
+ static void handle_rx_console(struct uart_port *uport, u32 bytes, bool drop)
+@@ -970,7 +970,7 @@ static irqreturn_t qcom_geni_serial_isr(
+ 	if (uport->suspended)
+ 		return IRQ_NONE;
+ 
+-	spin_lock(&uport->lock);
++	uart_port_lock(uport);
+ 
+ 	m_irq_status = readl(uport->membase + SE_GENI_M_IRQ_STATUS);
+ 	s_irq_status = readl(uport->membase + SE_GENI_S_IRQ_STATUS);