summaryrefslogtreecommitdiffstats
path: root/debian/patches-rt/0063-serial-st-asc-Use-port-lock-wrappers.patch
diff options
context:
space:
mode:
Diffstat (limited to 'debian/patches-rt/0063-serial-st-asc-Use-port-lock-wrappers.patch')
-rw-r--r--debian/patches-rt/0063-serial-st-asc-Use-port-lock-wrappers.patch110
1 files changed, 0 insertions, 110 deletions
diff --git a/debian/patches-rt/0063-serial-st-asc-Use-port-lock-wrappers.patch b/debian/patches-rt/0063-serial-st-asc-Use-port-lock-wrappers.patch
deleted file mode 100644
index 99f4358e61..0000000000
--- a/debian/patches-rt/0063-serial-st-asc-Use-port-lock-wrappers.patch
+++ /dev/null
@@ -1,110 +0,0 @@
-From: Thomas Gleixner <tglx@linutronix.de>
-Date: Thu, 14 Sep 2023 20:44:20 +0206
-Subject: [PATCH 063/134] serial: st-asc: 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/20230914183831.587273-64-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/st-asc.c | 18 +++++++++---------
- 1 file changed, 9 insertions(+), 9 deletions(-)
-
---- a/drivers/tty/serial/st-asc.c
-+++ b/drivers/tty/serial/st-asc.c
-@@ -319,7 +319,7 @@ static irqreturn_t asc_interrupt(int irq
- struct uart_port *port = ptr;
- u32 status;
-
-- spin_lock(&port->lock);
-+ uart_port_lock(port);
-
- status = asc_in(port, ASC_STA);
-
-@@ -334,7 +334,7 @@ static irqreturn_t asc_interrupt(int irq
- asc_transmit_chars(port);
- }
-
-- spin_unlock(&port->lock);
-+ uart_port_unlock(port);
-
- return IRQ_HANDLED;
- }
-@@ -452,10 +452,10 @@ static void asc_pm(struct uart_port *por
- * we can come to turning it off. Note this is not called with
- * the port spinlock held.
- */
-- spin_lock_irqsave(&port->lock, flags);
-+ uart_port_lock_irqsave(port, &flags);
- ctl = asc_in(port, ASC_CTL) & ~ASC_CTL_RUN;
- asc_out(port, ASC_CTL, ctl);
-- spin_unlock_irqrestore(&port->lock, flags);
-+ uart_port_unlock_irqrestore(port, flags);
- clk_disable_unprepare(ascport->clk);
- break;
- }
-@@ -480,7 +480,7 @@ static void asc_set_termios(struct uart_
- baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16);
- cflag = termios->c_cflag;
-
-- spin_lock_irqsave(&port->lock, flags);
-+ uart_port_lock_irqsave(port, &flags);
-
- /* read control register */
- ctrl_val = asc_in(port, ASC_CTL);
-@@ -594,7 +594,7 @@ static void asc_set_termios(struct uart_
- /* write final value and enable port */
- asc_out(port, ASC_CTL, (ctrl_val | ASC_CTL_RUN));
-
-- spin_unlock_irqrestore(&port->lock, flags);
-+ uart_port_unlock_irqrestore(port, flags);
- }
-
- static const char *asc_type(struct uart_port *port)
-@@ -849,9 +849,9 @@ static void asc_console_write(struct con
- if (port->sysrq)
- locked = 0; /* asc_interrupt has already claimed the lock */
- 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);
-
- /*
- * Disable interrupts so we don't get the IRQ line bouncing
-@@ -869,7 +869,7 @@ static void asc_console_write(struct con
- asc_out(port, ASC_INTEN, intenable);
-
- if (locked)
-- spin_unlock_irqrestore(&port->lock, flags);
-+ uart_port_unlock_irqrestore(port, flags);
- }
-
- static int asc_console_setup(struct console *co, char *options)