diff options
Diffstat (limited to 'debian/patches-rt/0044-serial-owl-Use-port-lock-wrappers.patch')
| -rw-r--r-- | debian/patches-rt/0044-serial-owl-Use-port-lock-wrappers.patch | 147 |
1 files changed, 0 insertions, 147 deletions
diff --git a/debian/patches-rt/0044-serial-owl-Use-port-lock-wrappers.patch b/debian/patches-rt/0044-serial-owl-Use-port-lock-wrappers.patch deleted file mode 100644 index fd8dc7501..000000000 --- a/debian/patches-rt/0044-serial-owl-Use-port-lock-wrappers.patch +++ /dev/null @@ -1,147 +0,0 @@ -From: Thomas Gleixner <tglx@linutronix.de> -Date: Thu, 14 Sep 2023 20:44:01 +0206 -Subject: [PATCH 044/134] serial: owl: 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/20230914183831.587273-45-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/owl-uart.c | 26 +++++++++++++------------- - 1 file changed, 13 insertions(+), 13 deletions(-) - ---- a/drivers/tty/serial/owl-uart.c -+++ b/drivers/tty/serial/owl-uart.c -@@ -125,12 +125,12 @@ static unsigned int owl_uart_tx_empty(st - u32 val; - unsigned int ret; - -- spin_lock_irqsave(&port->lock, flags); -+ uart_port_lock_irqsave(port, &flags); - - val = owl_uart_read(port, OWL_UART_STAT); - ret = (val & OWL_UART_STAT_TFES) ? TIOCSER_TEMT : 0; - -- spin_unlock_irqrestore(&port->lock, flags); -+ uart_port_unlock_irqrestore(port, flags); - - return ret; - } -@@ -232,7 +232,7 @@ static irqreturn_t owl_uart_irq(int irq, - unsigned long flags; - u32 stat; - -- spin_lock_irqsave(&port->lock, flags); -+ uart_port_lock_irqsave(port, &flags); - - stat = owl_uart_read(port, OWL_UART_STAT); - -@@ -246,7 +246,7 @@ static irqreturn_t owl_uart_irq(int irq, - stat |= OWL_UART_STAT_RIP | OWL_UART_STAT_TIP; - owl_uart_write(port, stat, OWL_UART_STAT); - -- spin_unlock_irqrestore(&port->lock, flags); -+ uart_port_unlock_irqrestore(port, flags); - - return IRQ_HANDLED; - } -@@ -256,14 +256,14 @@ static void owl_uart_shutdown(struct uar - u32 val; - unsigned long flags; - -- spin_lock_irqsave(&port->lock, flags); -+ uart_port_lock_irqsave(port, &flags); - - val = owl_uart_read(port, OWL_UART_CTL); - val &= ~(OWL_UART_CTL_TXIE | OWL_UART_CTL_RXIE - | OWL_UART_CTL_TXDE | OWL_UART_CTL_RXDE | OWL_UART_CTL_EN); - owl_uart_write(port, val, OWL_UART_CTL); - -- spin_unlock_irqrestore(&port->lock, flags); -+ uart_port_unlock_irqrestore(port, flags); - - free_irq(port->irq, port); - } -@@ -279,7 +279,7 @@ static int owl_uart_startup(struct uart_ - if (ret) - return ret; - -- spin_lock_irqsave(&port->lock, flags); -+ uart_port_lock_irqsave(port, &flags); - - val = owl_uart_read(port, OWL_UART_STAT); - val |= OWL_UART_STAT_RIP | OWL_UART_STAT_TIP -@@ -291,7 +291,7 @@ static int owl_uart_startup(struct uart_ - val |= OWL_UART_CTL_EN; - owl_uart_write(port, val, OWL_UART_CTL); - -- spin_unlock_irqrestore(&port->lock, flags); -+ uart_port_unlock_irqrestore(port, flags); - - return 0; - } -@@ -311,7 +311,7 @@ static void owl_uart_set_termios(struct - u32 ctl; - unsigned long flags; - -- spin_lock_irqsave(&port->lock, flags); -+ uart_port_lock_irqsave(port, &flags); - - ctl = owl_uart_read(port, OWL_UART_CTL); - -@@ -371,7 +371,7 @@ static void owl_uart_set_termios(struct - - uart_update_timeout(port, termios->c_cflag, baud); - -- spin_unlock_irqrestore(&port->lock, flags); -+ uart_port_unlock_irqrestore(port, flags); - } - - static void owl_uart_release_port(struct uart_port *port) -@@ -515,9 +515,9 @@ static void owl_uart_port_write(struct u - if (port->sysrq) - locked = 0; - else if (oops_in_progress) -- locked = spin_trylock(&port->lock); -+ locked = uart_port_trylock(port); - else { -- spin_lock(&port->lock); -+ uart_port_lock(port); - locked = 1; - } - -@@ -541,7 +541,7 @@ static void owl_uart_port_write(struct u - owl_uart_write(port, old_ctl, OWL_UART_CTL); - - if (locked) -- spin_unlock(&port->lock); -+ uart_port_unlock(port); - - local_irq_restore(flags); - } |