diff options
Diffstat (limited to 'debian/patches-rt/0024-serial-digicolor-Use-port-lock-wrappers.patch')
| -rw-r--r-- | debian/patches-rt/0024-serial-digicolor-Use-port-lock-wrappers.patch | 113 |
1 files changed, 0 insertions, 113 deletions
diff --git a/debian/patches-rt/0024-serial-digicolor-Use-port-lock-wrappers.patch b/debian/patches-rt/0024-serial-digicolor-Use-port-lock-wrappers.patch deleted file mode 100644 index 2a3aa5c9a..000000000 --- a/debian/patches-rt/0024-serial-digicolor-Use-port-lock-wrappers.patch +++ /dev/null @@ -1,113 +0,0 @@ -From: Thomas Gleixner <tglx@linutronix.de> -Date: Thu, 14 Sep 2023 20:43:41 +0206 -Subject: [PATCH 024/134] serial: digicolor: 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> -Acked-by: Baruch Siach <baruch@tkos.co.il> -Signed-off-by: John Ogness <john.ogness@linutronix.de> -Link: https://lore.kernel.org/r/20230914183831.587273-25-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/digicolor-usart.c | 18 +++++++++--------- - 1 file changed, 9 insertions(+), 9 deletions(-) - ---- a/drivers/tty/serial/digicolor-usart.c -+++ b/drivers/tty/serial/digicolor-usart.c -@@ -133,7 +133,7 @@ static void digicolor_uart_rx(struct uar - { - unsigned long flags; - -- spin_lock_irqsave(&port->lock, flags); -+ uart_port_lock_irqsave(port, &flags); - - while (1) { - u8 status, ch, ch_flag; -@@ -172,7 +172,7 @@ static void digicolor_uart_rx(struct uar - ch_flag); - } - -- spin_unlock_irqrestore(&port->lock, flags); -+ uart_port_unlock_irqrestore(port, flags); - - tty_flip_buffer_push(&port->state->port); - } -@@ -185,7 +185,7 @@ static void digicolor_uart_tx(struct uar - if (digicolor_uart_tx_full(port)) - return; - -- spin_lock_irqsave(&port->lock, flags); -+ uart_port_lock_irqsave(port, &flags); - - if (port->x_char) { - writeb_relaxed(port->x_char, port->membase + UA_EMI_REC); -@@ -211,7 +211,7 @@ static void digicolor_uart_tx(struct uar - uart_write_wakeup(port); - - out: -- spin_unlock_irqrestore(&port->lock, flags); -+ uart_port_unlock_irqrestore(port, flags); - } - - static irqreturn_t digicolor_uart_int(int irq, void *dev_id) -@@ -333,7 +333,7 @@ static void digicolor_uart_set_termios(s - port->ignore_status_mask |= UA_STATUS_OVERRUN_ERR - | UA_STATUS_PARITY_ERR | UA_STATUS_FRAME_ERR; - -- spin_lock_irqsave(&port->lock, flags); -+ uart_port_lock_irqsave(port, &flags); - - uart_update_timeout(port, termios->c_cflag, baud); - -@@ -341,7 +341,7 @@ static void digicolor_uart_set_termios(s - writeb_relaxed(divisor & 0xff, port->membase + UA_HBAUD_LO); - writeb_relaxed(divisor >> 8, port->membase + UA_HBAUD_HI); - -- spin_unlock_irqrestore(&port->lock, flags); -+ uart_port_unlock_irqrestore(port, flags); - } - - static const char *digicolor_uart_type(struct uart_port *port) -@@ -398,14 +398,14 @@ static void digicolor_uart_console_write - int locked = 1; - - 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, c, n, digicolor_uart_console_putchar); - - if (locked) -- spin_unlock_irqrestore(&port->lock, flags); -+ uart_port_unlock_irqrestore(port, flags); - - /* Wait for transmitter to become empty */ - do { |