diff options
Diffstat (limited to 'debian/patches-rt/0059-serial-txx9-Use-port-lock-wrappers.patch')
| -rw-r--r-- | debian/patches-rt/0059-serial-txx9-Use-port-lock-wrappers.patch | 134 |
1 files changed, 0 insertions, 134 deletions
diff --git a/debian/patches-rt/0059-serial-txx9-Use-port-lock-wrappers.patch b/debian/patches-rt/0059-serial-txx9-Use-port-lock-wrappers.patch deleted file mode 100644 index bbe48684ba..0000000000 --- a/debian/patches-rt/0059-serial-txx9-Use-port-lock-wrappers.patch +++ /dev/null @@ -1,134 +0,0 @@ -From: Thomas Gleixner <tglx@linutronix.de> -Date: Thu, 14 Sep 2023 20:44:16 +0206 -Subject: [PATCH 059/134] serial: txx9: 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/20230914183831.587273-60-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/serial_txx9.c | 26 +++++++++++++------------- - 1 file changed, 13 insertions(+), 13 deletions(-) - ---- a/drivers/tty/serial/serial_txx9.c -+++ b/drivers/tty/serial/serial_txx9.c -@@ -335,13 +335,13 @@ static irqreturn_t serial_txx9_interrupt - unsigned int status; - - while (1) { -- spin_lock(&up->lock); -+ uart_port_lock(up); - status = sio_in(up, TXX9_SIDISR); - if (!(sio_in(up, TXX9_SIDICR) & TXX9_SIDICR_TIE)) - status &= ~TXX9_SIDISR_TDIS; - if (!(status & (TXX9_SIDISR_TDIS | TXX9_SIDISR_RDIS | - TXX9_SIDISR_TOUT))) { -- spin_unlock(&up->lock); -+ uart_port_unlock(up); - break; - } - -@@ -353,7 +353,7 @@ static irqreturn_t serial_txx9_interrupt - sio_mask(up, TXX9_SIDISR, - TXX9_SIDISR_TDIS | TXX9_SIDISR_RDIS | - TXX9_SIDISR_TOUT); -- spin_unlock(&up->lock); -+ uart_port_unlock(up); - - if (pass_counter++ > PASS_LIMIT) - break; -@@ -367,9 +367,9 @@ static unsigned int serial_txx9_tx_empty - unsigned long flags; - unsigned int ret; - -- spin_lock_irqsave(&up->lock, flags); -+ uart_port_lock_irqsave(up, &flags); - ret = (sio_in(up, TXX9_SICISR) & TXX9_SICISR_TXALS) ? TIOCSER_TEMT : 0; -- spin_unlock_irqrestore(&up->lock, flags); -+ uart_port_unlock_irqrestore(up, flags); - - return ret; - } -@@ -399,12 +399,12 @@ static void serial_txx9_break_ctl(struct - { - unsigned long flags; - -- spin_lock_irqsave(&up->lock, flags); -+ uart_port_lock_irqsave(up, &flags); - if (break_state == -1) - sio_set(up, TXX9_SIFLCR, TXX9_SIFLCR_TBRK); - else - sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_TBRK); -- spin_unlock_irqrestore(&up->lock, flags); -+ uart_port_unlock_irqrestore(up, flags); - } - - #if defined(CONFIG_SERIAL_TXX9_CONSOLE) || defined(CONFIG_CONSOLE_POLL) -@@ -517,9 +517,9 @@ static int serial_txx9_startup(struct ua - /* - * Now, initialize the UART - */ -- spin_lock_irqsave(&up->lock, flags); -+ uart_port_lock_irqsave(up, &flags); - serial_txx9_set_mctrl(up, up->mctrl); -- spin_unlock_irqrestore(&up->lock, flags); -+ uart_port_unlock_irqrestore(up, flags); - - /* Enable RX/TX */ - sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_RSDE | TXX9_SIFLCR_TSDE); -@@ -541,9 +541,9 @@ static void serial_txx9_shutdown(struct - */ - sio_out(up, TXX9_SIDICR, 0); /* disable all intrs */ - -- spin_lock_irqsave(&up->lock, flags); -+ uart_port_lock_irqsave(up, &flags); - serial_txx9_set_mctrl(up, up->mctrl); -- spin_unlock_irqrestore(&up->lock, flags); -+ uart_port_unlock_irqrestore(up, flags); - - /* - * Disable break condition -@@ -625,7 +625,7 @@ serial_txx9_set_termios(struct uart_port - * Ok, we're now changing the port state. Do it with - * interrupts disabled. - */ -- spin_lock_irqsave(&up->lock, flags); -+ uart_port_lock_irqsave(up, &flags); - - /* - * Update the per-port timeout. -@@ -676,7 +676,7 @@ serial_txx9_set_termios(struct uart_port - sio_out(up, TXX9_SIFCR, fcr); - - serial_txx9_set_mctrl(up, up->mctrl); -- spin_unlock_irqrestore(&up->lock, flags); -+ uart_port_unlock_irqrestore(up, flags); - } - - static void |