diff options
Diffstat (limited to 'debian/patches-rt/0015-serial-altera_uart-Use-port-lock-wrappers.patch')
| -rw-r--r-- | debian/patches-rt/0015-serial-altera_uart-Use-port-lock-wrappers.patch | 116 |
1 files changed, 0 insertions, 116 deletions
diff --git a/debian/patches-rt/0015-serial-altera_uart-Use-port-lock-wrappers.patch b/debian/patches-rt/0015-serial-altera_uart-Use-port-lock-wrappers.patch deleted file mode 100644 index 95e2c031f..000000000 --- a/debian/patches-rt/0015-serial-altera_uart-Use-port-lock-wrappers.patch +++ /dev/null @@ -1,116 +0,0 @@ -From: Thomas Gleixner <tglx@linutronix.de> -Date: Thu, 14 Sep 2023 20:43:32 +0206 -Subject: [PATCH 015/134] serial: altera_uart: 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/20230914183831.587273-16-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/altera_uart.c | 20 ++++++++++---------- - 1 file changed, 10 insertions(+), 10 deletions(-) - ---- a/drivers/tty/serial/altera_uart.c -+++ b/drivers/tty/serial/altera_uart.c -@@ -164,13 +164,13 @@ static void altera_uart_break_ctl(struct - struct altera_uart *pp = container_of(port, struct altera_uart, port); - unsigned long flags; - -- spin_lock_irqsave(&port->lock, flags); -+ uart_port_lock_irqsave(port, &flags); - if (break_state == -1) - pp->imr |= ALTERA_UART_CONTROL_TRBK_MSK; - else - pp->imr &= ~ALTERA_UART_CONTROL_TRBK_MSK; - altera_uart_update_ctrl_reg(pp); -- spin_unlock_irqrestore(&port->lock, flags); -+ uart_port_unlock_irqrestore(port, flags); - } - - static void altera_uart_set_termios(struct uart_port *port, -@@ -187,10 +187,10 @@ static void altera_uart_set_termios(stru - tty_termios_copy_hw(termios, old); - tty_termios_encode_baud_rate(termios, baud, baud); - -- spin_lock_irqsave(&port->lock, flags); -+ uart_port_lock_irqsave(port, &flags); - uart_update_timeout(port, termios->c_cflag, baud); - altera_uart_writel(port, baudclk, ALTERA_UART_DIVISOR_REG); -- spin_unlock_irqrestore(&port->lock, flags); -+ uart_port_unlock_irqrestore(port, flags); - - /* - * FIXME: port->read_status_mask and port->ignore_status_mask -@@ -264,12 +264,12 @@ static irqreturn_t altera_uart_interrupt - - isr = altera_uart_readl(port, ALTERA_UART_STATUS_REG) & pp->imr; - -- spin_lock_irqsave(&port->lock, flags); -+ uart_port_lock_irqsave(port, &flags); - if (isr & ALTERA_UART_STATUS_RRDY_MSK) - altera_uart_rx_chars(port); - if (isr & ALTERA_UART_STATUS_TRDY_MSK) - altera_uart_tx_chars(port); -- spin_unlock_irqrestore(&port->lock, flags); -+ uart_port_unlock_irqrestore(port, flags); - - return IRQ_RETVAL(isr); - } -@@ -313,13 +313,13 @@ static int altera_uart_startup(struct ua - } - } - -- spin_lock_irqsave(&port->lock, flags); -+ uart_port_lock_irqsave(port, &flags); - - /* Enable RX interrupts now */ - pp->imr = ALTERA_UART_CONTROL_RRDY_MSK; - altera_uart_update_ctrl_reg(pp); - -- spin_unlock_irqrestore(&port->lock, flags); -+ uart_port_unlock_irqrestore(port, flags); - - return 0; - } -@@ -329,13 +329,13 @@ static void altera_uart_shutdown(struct - struct altera_uart *pp = container_of(port, struct altera_uart, port); - unsigned long flags; - -- spin_lock_irqsave(&port->lock, flags); -+ uart_port_lock_irqsave(port, &flags); - - /* Disable all interrupts now */ - pp->imr = 0; - altera_uart_update_ctrl_reg(pp); - -- spin_unlock_irqrestore(&port->lock, flags); -+ uart_port_unlock_irqrestore(port, flags); - - if (port->irq) - free_irq(port->irq, port); |