diff options
Diffstat (limited to 'debian/patches-rt/0008-serial-sunplus-Use-uart_prepare_sysrq_char.patch')
-rw-r--r-- | debian/patches-rt/0008-serial-sunplus-Use-uart_prepare_sysrq_char.patch | 67 |
1 files changed, 0 insertions, 67 deletions
diff --git a/debian/patches-rt/0008-serial-sunplus-Use-uart_prepare_sysrq_char.patch b/debian/patches-rt/0008-serial-sunplus-Use-uart_prepare_sysrq_char.patch deleted file mode 100644 index fc7a5b7254..0000000000 --- a/debian/patches-rt/0008-serial-sunplus-Use-uart_prepare_sysrq_char.patch +++ /dev/null @@ -1,67 +0,0 @@ -From: Sebastian Andrzej Siewior <bigeasy@linutronix.de> -Date: Fri, 1 Mar 2024 22:45:21 +0100 -Subject: [PATCH 08/18] serial: sunplus: 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. - -Cc: Hammer Hsieh <hammerh0314@gmail.com> -Link: https://lore.kernel.org/r/20240301215246.891055-9-bigeasy@linutronix.de -Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> ---- - drivers/tty/serial/sunplus-uart.c | 18 ++++++------------ - 1 file changed, 6 insertions(+), 12 deletions(-) - ---- a/drivers/tty/serial/sunplus-uart.c -+++ b/drivers/tty/serial/sunplus-uart.c -@@ -260,7 +260,7 @@ static void receive_chars(struct uart_po - if (port->ignore_status_mask & SUP_DUMMY_READ) - goto ignore_char; - -- if (uart_handle_sysrq_char(port, ch)) -+ if (uart_prepare_sysrq_char(port, ch)) - goto ignore_char; - - uart_insert_char(port, lsr, SUP_UART_LSR_OE, ch, flag); -@@ -287,7 +287,7 @@ static irqreturn_t sunplus_uart_irq(int - if (isc & SUP_UART_ISC_TX) - transmit_chars(port); - -- uart_port_unlock(port); -+ uart_unlock_and_check_sysrq(port); - - return IRQ_HANDLED; - } -@@ -512,22 +512,16 @@ static void sunplus_console_write(struct - unsigned long flags; - int locked = 1; - -- local_irq_save(flags); -- -- if (sunplus_console_ports[co->index]->port.sysrq) -- locked = 0; -- else if (oops_in_progress) -- locked = uart_port_trylock(&sunplus_console_ports[co->index]->port); -+ if (oops_in_progress) -+ locked = uart_port_trylock_irqsave(&sunplus_console_ports[co->index]->port, &flags); - else -- uart_port_lock(&sunplus_console_ports[co->index]->port); -+ uart_port_lock_irqsave(&sunplus_console_ports[co->index]->port, &flags); - - uart_console_write(&sunplus_console_ports[co->index]->port, s, count, - sunplus_uart_console_putchar); - - if (locked) -- uart_port_unlock(&sunplus_console_ports[co->index]->port); -- -- local_irq_restore(flags); -+ uart_port_unlock_irqrestore(&sunplus_console_ports[co->index]->port, flags); - } - - static int __init sunplus_console_setup(struct console *co, char *options) |