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, 162 insertions, 0 deletions

diff --git a/debian/patches-rt/0062-serial-sprd-Use-port-lock-wrappers.patch b/debian/patches-rt/0062-serial-sprd-Use-port-lock-wrappers.patch
new file mode 100644
index 0000000000..5be78db092
--- /dev/null
+++ b/debian/patches-rt/0062-serial-sprd-Use-port-lock-wrappers.patch
@@ -0,0 +1,162 @@
+From: Thomas Gleixner <tglx@linutronix.de>
+Date: Thu, 14 Sep 2023 20:44:19 +0206
+Subject: [PATCH 062/134] serial: sprd: 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/20230914183831.587273-63-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/sprd_serial.c |   30 +++++++++++++++---------------
+ 1 file changed, 15 insertions(+), 15 deletions(-)
+
+--- a/drivers/tty/serial/sprd_serial.c
++++ b/drivers/tty/serial/sprd_serial.c
+@@ -247,7 +247,7 @@ static void sprd_complete_tx_dma(void *d
+ 	struct circ_buf *xmit = &port->state->xmit;
+ 	unsigned long flags;
+ 
+-	spin_lock_irqsave(&port->lock, flags);
++	uart_port_lock_irqsave(port, &flags);
+ 	dma_unmap_single(port->dev, sp->tx_dma.phys_addr,
+ 			 sp->tx_dma.trans_len, DMA_TO_DEVICE);
+ 
+@@ -260,7 +260,7 @@ static void sprd_complete_tx_dma(void *d
+ 	    sprd_tx_dma_config(port))
+ 		sp->tx_dma.trans_len = 0;
+ 
+-	spin_unlock_irqrestore(&port->lock, flags);
++	uart_port_unlock_irqrestore(port, flags);
+ }
+ 
+ static int sprd_uart_dma_submit(struct uart_port *port,
+@@ -429,13 +429,13 @@ static void sprd_complete_rx_dma(void *d
+ 	enum dma_status status;
+ 	unsigned long flags;
+ 
+-	spin_lock_irqsave(&port->lock, flags);
++	uart_port_lock_irqsave(port, &flags);
+ 
+ 	status = dmaengine_tx_status(sp->rx_dma.chn,
+ 				     sp->rx_dma.cookie, &state);
+ 	if (status != DMA_COMPLETE) {
+ 		sprd_stop_rx(port);
+-		spin_unlock_irqrestore(&port->lock, flags);
++		uart_port_unlock_irqrestore(port, flags);
+ 		return;
+ 	}
+ 
+@@ -449,7 +449,7 @@ static void sprd_complete_rx_dma(void *d
+ 	if (sprd_start_dma_rx(port))
+ 		sprd_stop_rx(port);
+ 
+-	spin_unlock_irqrestore(&port->lock, flags);
++	uart_port_unlock_irqrestore(port, flags);
+ }
+ 
+ static int sprd_start_dma_rx(struct uart_port *port)
+@@ -638,12 +638,12 @@ static irqreturn_t sprd_handle_irq(int i
+ 	struct uart_port *port = dev_id;
+ 	unsigned int ims;
+ 
+-	spin_lock(&port->lock);
++	uart_port_lock(port);
+ 
+ 	ims = serial_in(port, SPRD_IMSR);
+ 
+ 	if (!ims) {
+-		spin_unlock(&port->lock);
++		uart_port_unlock(port);
+ 		return IRQ_NONE;
+ 	}
+ 
+@@ -660,7 +660,7 @@ static irqreturn_t sprd_handle_irq(int i
+ 	if (ims & SPRD_IMSR_TX_FIFO_EMPTY)
+ 		sprd_tx(port);
+ 
+-	spin_unlock(&port->lock);
++	uart_port_unlock(port);
+ 
+ 	return IRQ_HANDLED;
+ }
+@@ -727,13 +727,13 @@ static int sprd_startup(struct uart_port
+ 	serial_out(port, SPRD_CTL1, fc);
+ 
+ 	/* enable interrupt */
+-	spin_lock_irqsave(&port->lock, flags);
++	uart_port_lock_irqsave(port, &flags);
+ 	ien = serial_in(port, SPRD_IEN);
+ 	ien |= SPRD_IEN_BREAK_DETECT | SPRD_IEN_TIMEOUT;
+ 	if (!sp->rx_dma.enable)
+ 		ien |= SPRD_IEN_RX_FULL;
+ 	serial_out(port, SPRD_IEN, ien);
+-	spin_unlock_irqrestore(&port->lock, flags);
++	uart_port_unlock_irqrestore(port, flags);
+ 
+ 	return 0;
+ }
+@@ -793,7 +793,7 @@ static void sprd_set_termios(struct uart
+ 			lcr |= SPRD_LCR_EVEN_PAR;
+ 	}
+ 
+-	spin_lock_irqsave(&port->lock, flags);
++	uart_port_lock_irqsave(port, &flags);
+ 
+ 	/* update the per-port timeout */
+ 	uart_update_timeout(port, termios->c_cflag, baud);
+@@ -837,7 +837,7 @@ static void sprd_set_termios(struct uart
+ 	fc |= RX_TOUT_THLD_DEF | RX_HFC_THLD_DEF;
+ 	serial_out(port, SPRD_CTL1, fc);
+ 
+-	spin_unlock_irqrestore(&port->lock, flags);
++	uart_port_unlock_irqrestore(port, flags);
+ 
+ 	/* Don't rewrite B0 */
+ 	if (tty_termios_baud_rate(termios))
+@@ -974,9 +974,9 @@ static void sprd_console_write(struct co
+ 	if (port->sysrq)
+ 		locked = 0;
+ 	else if (oops_in_progress)
+-		locked = spin_trylock_irqsave(&port->lock, flags);
++		locked = uart_port_trylock_irqsave(port, &flags);
+ 	else
+-		spin_lock_irqsave(&port->lock, flags);
++		uart_port_lock_irqsave(port, &flags);
+ 
+ 	uart_console_write(port, s, count, sprd_console_putchar);
+ 
+@@ -984,7 +984,7 @@ static void sprd_console_write(struct co
+ 	wait_for_xmitr(port);
+ 
+ 	if (locked)
+-		spin_unlock_irqrestore(&port->lock, flags);
++		uart_port_unlock_irqrestore(port, flags);
+ }
+ 
+ static int sprd_console_setup(struct console *co, char *options)