Adding debian version 6.8.9-1.debian/6.8.9-1

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

1 files changed, 0 insertions, 335 deletions

diff --git a/debian/patches-rt/0047-serial-8250-Switch-to-nbcon-console.patch b/debian/patches-rt/0047-serial-8250-Switch-to-nbcon-console.patch
deleted file mode 100644
index 015a996d2c..0000000000
--- a/debian/patches-rt/0047-serial-8250-Switch-to-nbcon-console.patch
+++ /dev/null
@@ -1,335 +0,0 @@
-From: John Ogness <john.ogness@linutronix.de>
-Date: Wed, 13 Sep 2023 15:30:36 +0000
-Subject: [PATCH 47/50] serial: 8250: Switch to nbcon console
-Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/6.7/older/patches-6.7-rt6.tar.xz
-
-Implement the necessary callbacks to switch the 8250 console driver
-to perform as an nbcon console.
-
-Add implementations for the nbcon consoles (write_atomic, write_thread,
-driver_enter, driver_exit) and add CON_NBCON to the initial flags.
-
-The legacy code is kept in order to easily switch back to legacy mode
-by defining CONFIG_SERIAL_8250_LEGACY_CONSOLE.
-
-Signed-off-by: John Ogness <john.ogness@linutronix.de>
-Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
----
- drivers/tty/serial/8250/8250_core.c |   42 +++++++++
- drivers/tty/serial/8250/8250_port.c |  156 +++++++++++++++++++++++++++++++++++-
- include/linux/serial_8250.h         |    6 +
- 3 files changed, 201 insertions(+), 3 deletions(-)
-
---- a/drivers/tty/serial/8250/8250_core.c
-+++ b/drivers/tty/serial/8250/8250_core.c
-@@ -592,6 +592,7 @@ serial8250_register_ports(struct uart_dr
- 
- #ifdef CONFIG_SERIAL_8250_CONSOLE
- 
-+#ifdef CONFIG_SERIAL_8250_LEGACY_CONSOLE
- static void univ8250_console_write(struct console *co, const char *s,
- 				   unsigned int count)
- {
-@@ -599,6 +600,37 @@ static void univ8250_console_write(struc
- 
- 	serial8250_console_write(up, s, count);
- }
-+#else
-+static bool univ8250_console_write_atomic(struct console *co,
-+					  struct nbcon_write_context *wctxt)
-+{
-+	struct uart_8250_port *up = &serial8250_ports[co->index];
-+
-+	return serial8250_console_write_atomic(up, wctxt);
-+}
-+
-+static bool univ8250_console_write_thread(struct console *co,
-+					  struct nbcon_write_context *wctxt)
-+{
-+	struct uart_8250_port *up = &serial8250_ports[co->index];
-+
-+	return serial8250_console_write_thread(up, wctxt);
-+}
-+
-+static void univ8250_console_driver_enter(struct console *con, unsigned long *flags)
-+{
-+	struct uart_port *up = &serial8250_ports[con->index].port;
-+
-+	__uart_port_lock_irqsave(up, flags);
-+}
-+
-+static void univ8250_console_driver_exit(struct console *con, unsigned long flags)
-+{
-+	struct uart_port *up = &serial8250_ports[con->index].port;
-+
-+	__uart_port_unlock_irqrestore(up, flags);
-+}
-+#endif /* CONFIG_SERIAL_8250_LEGACY_CONSOLE */
- 
- static int univ8250_console_setup(struct console *co, char *options)
- {
-@@ -698,12 +730,20 @@ static int univ8250_console_match(struct
- 
- static struct console univ8250_console = {
- 	.name		= "ttyS",
-+#ifdef CONFIG_SERIAL_8250_LEGACY_CONSOLE
- 	.write		= univ8250_console_write,
-+	.flags		= CON_PRINTBUFFER | CON_ANYTIME,
-+#else
-+	.write_atomic	= univ8250_console_write_atomic,
-+	.write_thread	= univ8250_console_write_thread,
-+	.driver_enter	= univ8250_console_driver_enter,
-+	.driver_exit	= univ8250_console_driver_exit,
-+	.flags		= CON_PRINTBUFFER | CON_ANYTIME | CON_NBCON,
-+#endif
- 	.device		= uart_console_device,
- 	.setup		= univ8250_console_setup,
- 	.exit		= univ8250_console_exit,
- 	.match		= univ8250_console_match,
--	.flags		= CON_PRINTBUFFER | CON_ANYTIME,
- 	.index		= -1,
- 	.data		= &serial8250_reg,
- };
---- a/drivers/tty/serial/8250/8250_port.c
-+++ b/drivers/tty/serial/8250/8250_port.c
-@@ -550,6 +550,11 @@ static int serial8250_em485_init(struct
- 	if (!p->em485)
- 		return -ENOMEM;
- 
-+#ifndef CONFIG_SERIAL_8250_LEGACY_CONSOLE
-+	if (uart_console(&p->port))
-+		dev_warn(p->port.dev, "no atomic printing for rs485 consoles\n");
-+#endif
-+
- 	hrtimer_init(&p->em485->stop_tx_timer, CLOCK_MONOTONIC,
- 		     HRTIMER_MODE_REL);
- 	hrtimer_init(&p->em485->start_tx_timer, CLOCK_MONOTONIC,
-@@ -702,7 +707,11 @@ static void serial8250_set_sleep(struct
- 	serial8250_rpm_put(p);
- }
- 
--static void serial8250_clear_IER(struct uart_8250_port *up)
-+/*
-+ * Only to be used by write_atomic() and the legacy write(), which do not
-+ * require port lock.
-+ */
-+static void __serial8250_clear_IER(struct uart_8250_port *up)
- {
- 	if (up->capabilities & UART_CAP_UUE)
- 		serial_out(up, UART_IER, UART_IER_UUE);
-@@ -710,6 +719,11 @@ static void serial8250_clear_IER(struct
- 		serial_out(up, UART_IER, 0);
- }
- 
-+static inline void serial8250_clear_IER(struct uart_8250_port *up)
-+{
-+	__serial8250_clear_IER(up);
-+}
-+
- #ifdef CONFIG_SERIAL_8250_RSA
- /*
-  * Attempts to turn on the RSA FIFO.  Returns zero on failure.
-@@ -3320,6 +3334,11 @@ static void serial8250_console_putchar(s
- 
- 	wait_for_xmitr(up, UART_LSR_THRE);
- 	serial_port_out(port, UART_TX, ch);
-+
-+	if (ch == '\n')
-+		up->console_newline_needed = false;
-+	else
-+		up->console_newline_needed = true;
- }
- 
- /*
-@@ -3348,6 +3367,7 @@ static void serial8250_console_restore(s
- 	serial8250_out_MCR(up, up->mcr | UART_MCR_DTR | UART_MCR_RTS);
- }
- 
-+#ifdef CONFIG_SERIAL_8250_LEGACY_CONSOLE
- /*
-  * Print a string to the serial port using the device FIFO
-  *
-@@ -3406,7 +3426,7 @@ void serial8250_console_write(struct uar
- 	 *	First save the IER then disable the interrupts
- 	 */
- 	ier = serial_port_in(port, UART_IER);
--	serial8250_clear_IER(up);
-+	__serial8250_clear_IER(up);
- 
- 	/* check scratch reg to see if port powered off during system sleep */
- 	if (up->canary && (up->canary != serial_port_in(port, UART_SCR))) {
-@@ -3472,6 +3492,135 @@ void serial8250_console_write(struct uar
- 	if (locked)
- 		uart_port_unlock_irqrestore(port, flags);
- }
-+#else
-+bool serial8250_console_write_thread(struct uart_8250_port *up,
-+				     struct nbcon_write_context *wctxt)
-+{
-+	struct uart_8250_em485 *em485 = up->em485;
-+	struct uart_port *port = &up->port;
-+	bool done = false;
-+	unsigned int ier;
-+
-+	touch_nmi_watchdog();
-+
-+	if (!nbcon_enter_unsafe(wctxt))
-+		return false;
-+
-+	/* First save IER then disable the interrupts. */
-+	ier = serial_port_in(port, UART_IER);
-+	serial8250_clear_IER(up);
-+
-+	/* Check scratch reg if port powered off during system sleep. */
-+	if (up->canary && (up->canary != serial_port_in(port, UART_SCR))) {
-+		serial8250_console_restore(up);
-+		up->canary = 0;
-+	}
-+
-+	if (em485) {
-+		if (em485->tx_stopped)
-+			up->rs485_start_tx(up);
-+		mdelay(port->rs485.delay_rts_before_send);
-+	}
-+
-+	if (nbcon_exit_unsafe(wctxt)) {
-+		int len = READ_ONCE(wctxt->len);
-+		int i;
-+
-+		/*
-+		 * Write out the message. Toggle unsafe for each byte in order
-+		 * to give another (higher priority) context the opportunity
-+		 * for a friendly takeover. If such a takeover occurs, this
-+		 * context must reacquire ownership in order to perform final
-+		 * actions (such as re-enabling the interrupts).
-+		 *
-+		 * IMPORTANT: wctxt->outbuf and wctxt->len are no longer valid
-+		 *	      after a reacquire so writing the message must be
-+		 *	      aborted.
-+		 */
-+		for (i = 0; i < len; i++) {
-+			if (!nbcon_enter_unsafe(wctxt)) {
-+				nbcon_reacquire(wctxt);
-+				break;
-+			}
-+
-+			uart_console_write(port, wctxt->outbuf + i, 1, serial8250_console_putchar);
-+
-+			if (!nbcon_exit_unsafe(wctxt)) {
-+				nbcon_reacquire(wctxt);
-+				break;
-+			}
-+		}
-+		done = (i == len);
-+	} else {
-+		nbcon_reacquire(wctxt);
-+	}
-+
-+	while (!nbcon_enter_unsafe(wctxt))
-+		nbcon_reacquire(wctxt);
-+
-+	/* Finally, wait for transmitter to become empty and restore IER. */
-+	wait_for_xmitr(up, UART_LSR_BOTH_EMPTY);
-+	if (em485) {
-+		mdelay(port->rs485.delay_rts_after_send);
-+		if (em485->tx_stopped)
-+			up->rs485_stop_tx(up);
-+	}
-+	serial_port_out(port, UART_IER, ier);
-+
-+	/*
-+	 * The receive handling will happen properly because the receive ready
-+	 * bit will still be set; it is not cleared on read.  However, modem
-+	 * control will not, we must call it if we have saved something in the
-+	 * saved flags while processing with interrupts off.
-+	 */
-+	if (up->msr_saved_flags)
-+		serial8250_modem_status(up);
-+
-+	/* Success if no handover/takeover and message fully printed. */
-+	return (nbcon_exit_unsafe(wctxt) && done);
-+}
-+
-+bool serial8250_console_write_atomic(struct uart_8250_port *up,
-+				     struct nbcon_write_context *wctxt)
-+{
-+	struct uart_port *port = &up->port;
-+	unsigned int ier;
-+
-+	/* Atomic console not supported for rs485 mode. */
-+	if (up->em485)
-+		return false;
-+
-+	touch_nmi_watchdog();
-+
-+	if (!nbcon_enter_unsafe(wctxt))
-+		return false;
-+
-+	/*
-+	 * First save IER then disable the interrupts. The special variant to
-+	 * clear IER is used because atomic printing may occur without holding
-+	 * the port lock.
-+	 */
-+	ier = serial_port_in(port, UART_IER);
-+	__serial8250_clear_IER(up);
-+
-+	/* Check scratch reg if port powered off during system sleep. */
-+	if (up->canary && (up->canary != serial_port_in(port, UART_SCR))) {
-+		serial8250_console_restore(up);
-+		up->canary = 0;
-+	}
-+
-+	if (up->console_newline_needed)
-+		uart_console_write(port, "\n", 1, serial8250_console_putchar);
-+	uart_console_write(port, wctxt->outbuf, wctxt->len, serial8250_console_putchar);
-+
-+	/* Finally, wait for transmitter to become empty and restore IER. */
-+	wait_for_xmitr(up, UART_LSR_BOTH_EMPTY);
-+	serial_port_out(port, UART_IER, ier);
-+
-+	/* Success if no handover/takeover. */
-+	return nbcon_exit_unsafe(wctxt);
-+}
-+#endif /* CONFIG_SERIAL_8250_LEGACY_CONSOLE */
- 
- static unsigned int probe_baud(struct uart_port *port)
- {
-@@ -3490,6 +3639,7 @@ static unsigned int probe_baud(struct ua
- 
- int serial8250_console_setup(struct uart_port *port, char *options, bool probe)
- {
-+	struct uart_8250_port *up = up_to_u8250p(port);
- 	int baud = 9600;
- 	int bits = 8;
- 	int parity = 'n';
-@@ -3499,6 +3649,8 @@ int serial8250_console_setup(struct uart
- 	if (!port->iobase && !port->membase)
- 		return -ENODEV;
- 
-+	up->console_newline_needed = false;
-+
- 	if (options)
- 		uart_parse_options(options, &baud, &parity, &bits, &flow);
- 	else if (probe)
---- a/include/linux/serial_8250.h
-+++ b/include/linux/serial_8250.h
-@@ -153,6 +153,8 @@ struct uart_8250_port {
- #define MSR_SAVE_FLAGS UART_MSR_ANY_DELTA
- 	unsigned char		msr_saved_flags;
- 
-+	bool			console_newline_needed;
-+
- 	struct uart_8250_dma	*dma;
- 	const struct uart_8250_ops *ops;
- 
-@@ -204,6 +206,10 @@ void serial8250_init_port(struct uart_82
- void serial8250_set_defaults(struct uart_8250_port *up);
- void serial8250_console_write(struct uart_8250_port *up, const char *s,
- 			      unsigned int count);
-+bool serial8250_console_write_atomic(struct uart_8250_port *up,
-+				     struct nbcon_write_context *wctxt);
-+bool serial8250_console_write_thread(struct uart_8250_port *up,
-+				     struct nbcon_write_context *wctxt);
- int serial8250_console_setup(struct uart_port *port, char *options, bool probe);
- int serial8250_console_exit(struct uart_port *port);
-