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, 151 insertions, 0 deletions

diff --git a/debian/patches-rt/0028-serial-icom-Use-port-lock-wrappers.patch b/debian/patches-rt/0028-serial-icom-Use-port-lock-wrappers.patch
new file mode 100644
index 0000000000..da765879ce
--- /dev/null
+++ b/debian/patches-rt/0028-serial-icom-Use-port-lock-wrappers.patch
@@ -0,0 +1,151 @@
+From: Thomas Gleixner <tglx@linutronix.de>
+Date: Thu, 14 Sep 2023 20:43:45 +0206
+Subject: [PATCH 028/134] serial: icom: 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/20230914183831.587273-29-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/icom.c |   26 +++++++++++++-------------
+ 1 file changed, 13 insertions(+), 13 deletions(-)
+
+--- a/drivers/tty/serial/icom.c
++++ b/drivers/tty/serial/icom.c
+@@ -929,7 +929,7 @@ static inline void check_modem_status(st
+ 	char delta_status;
+ 	unsigned char status;
+ 
+-	spin_lock(&icom_port->uart_port.lock);
++	uart_port_lock(&icom_port->uart_port);
+ 
+ 	/*modem input register */
+ 	status = readb(&icom_port->dram->isr);
+@@ -951,7 +951,7 @@ static inline void check_modem_status(st
+ 				      port.delta_msr_wait);
+ 		old_status = status;
+ 	}
+-	spin_unlock(&icom_port->uart_port.lock);
++	uart_port_unlock(&icom_port->uart_port);
+ }
+ 
+ static void xmit_interrupt(u16 port_int_reg, struct icom_port *icom_port)
+@@ -1093,7 +1093,7 @@ static void process_interrupt(u16 port_i
+ 			      struct icom_port *icom_port)
+ {
+ 
+-	spin_lock(&icom_port->uart_port.lock);
++	uart_port_lock(&icom_port->uart_port);
+ 	trace(icom_port, "INTERRUPT", port_int_reg);
+ 
+ 	if (port_int_reg & (INT_XMIT_COMPLETED | INT_XMIT_DISABLED))
+@@ -1102,7 +1102,7 @@ static void process_interrupt(u16 port_i
+ 	if (port_int_reg & INT_RCV_COMPLETED)
+ 		recv_interrupt(port_int_reg, icom_port);
+ 
+-	spin_unlock(&icom_port->uart_port.lock);
++	uart_port_unlock(&icom_port->uart_port);
+ }
+ 
+ static irqreturn_t icom_interrupt(int irq, void *dev_id)
+@@ -1186,14 +1186,14 @@ static unsigned int icom_tx_empty(struct
+ 	int ret;
+ 	unsigned long flags;
+ 
+-	spin_lock_irqsave(&port->lock, flags);
++	uart_port_lock_irqsave(port, &flags);
+ 	if (le16_to_cpu(icom_port->statStg->xmit[0].flags) &
+ 	    SA_FLAGS_READY_TO_XMIT)
+ 		ret = TIOCSER_TEMT;
+ 	else
+ 		ret = 0;
+ 
+-	spin_unlock_irqrestore(&port->lock, flags);
++	uart_port_unlock_irqrestore(port, flags);
+ 	return ret;
+ }
+ 
+@@ -1276,7 +1276,7 @@ static void icom_send_xchar(struct uart_
+ 
+ 	/* wait .1 sec to send char */
+ 	for (index = 0; index < 10; index++) {
+-		spin_lock_irqsave(&port->lock, flags);
++		uart_port_lock_irqsave(port, &flags);
+ 		xdata = readb(&icom_port->dram->xchar);
+ 		if (xdata == 0x00) {
+ 			trace(icom_port, "QUICK_WRITE", 0);
+@@ -1284,10 +1284,10 @@ static void icom_send_xchar(struct uart_
+ 
+ 			/* flush write operation */
+ 			xdata = readb(&icom_port->dram->xchar);
+-			spin_unlock_irqrestore(&port->lock, flags);
++			uart_port_unlock_irqrestore(port, flags);
+ 			break;
+ 		}
+-		spin_unlock_irqrestore(&port->lock, flags);
++		uart_port_unlock_irqrestore(port, flags);
+ 		msleep(10);
+ 	}
+ }
+@@ -1307,7 +1307,7 @@ static void icom_break(struct uart_port
+ 	unsigned char cmdReg;
+ 	unsigned long flags;
+ 
+-	spin_lock_irqsave(&port->lock, flags);
++	uart_port_lock_irqsave(port, &flags);
+ 	trace(icom_port, "BREAK", 0);
+ 	cmdReg = readb(&icom_port->dram->CmdReg);
+ 	if (break_state == -1) {
+@@ -1315,7 +1315,7 @@ static void icom_break(struct uart_port
+ 	} else {
+ 		writeb(cmdReg & ~CMD_SND_BREAK, &icom_port->dram->CmdReg);
+ 	}
+-	spin_unlock_irqrestore(&port->lock, flags);
++	uart_port_unlock_irqrestore(port, flags);
+ }
+ 
+ static int icom_open(struct uart_port *port)
+@@ -1365,7 +1365,7 @@ static void icom_set_termios(struct uart
+ 	unsigned long offset;
+ 	unsigned long flags;
+ 
+-	spin_lock_irqsave(&port->lock, flags);
++	uart_port_lock_irqsave(port, &flags);
+ 	trace(icom_port, "CHANGE_SPEED", 0);
+ 
+ 	cflag = termios->c_cflag;
+@@ -1516,7 +1516,7 @@ static void icom_set_termios(struct uart
+ 	trace(icom_port, "XR_ENAB", 0);
+ 	writeb(CMD_XMIT_RCV_ENABLE, &icom_port->dram->CmdReg);
+ 
+-	spin_unlock_irqrestore(&port->lock, flags);
++	uart_port_unlock_irqrestore(port, flags);
+ }
+ 
+ static const char *icom_type(struct uart_port *port)