diff options
Diffstat (limited to 'debian/patches-rt/0006-serial-omap-Use-uart_prepare_sysrq_char.patch')
-rw-r--r-- | debian/patches-rt/0006-serial-omap-Use-uart_prepare_sysrq_char.patch | 66 |
1 files changed, 0 insertions, 66 deletions
diff --git a/debian/patches-rt/0006-serial-omap-Use-uart_prepare_sysrq_char.patch b/debian/patches-rt/0006-serial-omap-Use-uart_prepare_sysrq_char.patch deleted file mode 100644 index 58fe8b1323..0000000000 --- a/debian/patches-rt/0006-serial-omap-Use-uart_prepare_sysrq_char.patch +++ /dev/null @@ -1,66 +0,0 @@ -From: Sebastian Andrzej Siewior <bigeasy@linutronix.de> -Date: Fri, 1 Mar 2024 22:45:19 +0100 -Subject: [PATCH 06/18] serial: omap: 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/20240301215246.891055-7-bigeasy@linutronix.de -Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> ---- - drivers/tty/serial/omap-serial.c | 16 ++++++---------- - 1 file changed, 6 insertions(+), 10 deletions(-) - ---- a/drivers/tty/serial/omap-serial.c -+++ b/drivers/tty/serial/omap-serial.c -@@ -508,7 +508,7 @@ static void serial_omap_rdi(struct uart_ - - up->port.icount.rx++; - -- if (uart_handle_sysrq_char(&up->port, ch)) -+ if (uart_prepare_sysrq_char(&up->port, ch)) - return; - - uart_insert_char(&up->port, lsr, UART_LSR_OE, ch, TTY_NORMAL); -@@ -563,7 +563,7 @@ static irqreturn_t serial_omap_irq(int i - } - } while (max_count--); - -- uart_port_unlock(&up->port); -+ uart_unlock_and_check_sysrq(&up->port); - - tty_flip_buffer_push(&up->port.state->port); - -@@ -1212,13 +1212,10 @@ serial_omap_console_write(struct console - unsigned int ier; - int locked = 1; - -- 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 -@@ -1245,8 +1242,7 @@ serial_omap_console_write(struct console - check_modem_status(up); - - if (locked) -- uart_port_unlock(&up->port); -- local_irq_restore(flags); -+ uart_port_unlock_irqrestore(&up->port, flags); - } - - static int __init |