diff options
Diffstat (limited to 'debian/patches-rt/0007-serial-pxa-Use-uart_prepare_sysrq_char.patch')
| -rw-r--r-- | debian/patches-rt/0007-serial-pxa-Use-uart_prepare_sysrq_char.patch | 68 |
1 files changed, 0 insertions, 68 deletions
diff --git a/debian/patches-rt/0007-serial-pxa-Use-uart_prepare_sysrq_char.patch b/debian/patches-rt/0007-serial-pxa-Use-uart_prepare_sysrq_char.patch deleted file mode 100644 index ae76e25872..0000000000 --- a/debian/patches-rt/0007-serial-pxa-Use-uart_prepare_sysrq_char.patch +++ /dev/null @@ -1,68 +0,0 @@ -From: Sebastian Andrzej Siewior <bigeasy@linutronix.de> -Date: Fri, 1 Mar 2024 22:45:20 +0100 -Subject: [PATCH 07/18] serial: pxa: Use uart_prepare_sysrq_char(). -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/6.8/older/patches-6.8.2-rt11.tar.xz - -The port lock is a spinlock_t which is becomes a sleeping lock on PREEMPT_RT. -The driver splits the locking function into two parts: local_irq_save() and -uart_port_lock() and this breaks PREEMPT_RT. - -Delay handling sysrq until port lock is dropped. -Remove the special case in the console write routine an always use the -complete locking function. - -Link: https://lore.kernel.org/r/20240301215246.891055-8-bigeasy@linutronix.de -Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> ---- - drivers/tty/serial/pxa.c | 17 ++++++----------- - 1 file changed, 6 insertions(+), 11 deletions(-) - ---- a/drivers/tty/serial/pxa.c -+++ b/drivers/tty/serial/pxa.c -@@ -151,7 +151,7 @@ static inline void receive_chars(struct - flag = TTY_FRAME; - } - -- if (uart_handle_sysrq_char(&up->port, ch)) -+ if (uart_prepare_sysrq_char(&up->port, ch)) - goto ignore_char; - - uart_insert_char(&up->port, *status, UART_LSR_OE, ch, flag); -@@ -232,7 +232,7 @@ static inline irqreturn_t serial_pxa_irq - check_modem_status(up); - if (lsr & UART_LSR_THRE) - transmit_chars(up); -- uart_port_unlock(&up->port); -+ uart_unlock_and_check_sysrq(&up->port); - return IRQ_HANDLED; - } - -@@ -604,13 +604,10 @@ serial_pxa_console_write(struct console - int locked = 1; - - clk_enable(up->clk); -- local_irq_save(flags); -- if (up->port.sysrq) -- locked = 0; -- else if (oops_in_progress) -- locked = uart_port_trylock(&up->port); -+ if (oops_in_progress) -+ locked = uart_port_trylock_irqsave(&up->port, &flags); - else -- uart_port_lock(&up->port); -+ uart_port_lock_irqsave(&up->port, &flags); - - /* - * First save the IER then disable the interrupts -@@ -628,10 +625,8 @@ serial_pxa_console_write(struct console - serial_out(up, UART_IER, ier); - - if (locked) -- uart_port_unlock(&up->port); -- local_irq_restore(flags); -+ uart_port_unlock_irqrestore(&up->port, flags); - clk_disable(up->clk); -- - } - - #ifdef CONFIG_CONSOLE_POLL |