diff options
Diffstat (limited to 'debian/patches-rt/0031-serial-jsm-Use-port-lock-wrappers.patch')
| -rw-r--r-- | debian/patches-rt/0031-serial-jsm-Use-port-lock-wrappers.patch | 124 |
1 files changed, 0 insertions, 124 deletions
diff --git a/debian/patches-rt/0031-serial-jsm-Use-port-lock-wrappers.patch b/debian/patches-rt/0031-serial-jsm-Use-port-lock-wrappers.patch deleted file mode 100644 index 4326b333a..000000000 --- a/debian/patches-rt/0031-serial-jsm-Use-port-lock-wrappers.patch +++ /dev/null @@ -1,124 +0,0 @@ -From: Thomas Gleixner <tglx@linutronix.de> -Date: Thu, 14 Sep 2023 20:43:48 +0206 -Subject: [PATCH 031/134] serial: jsm: 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/20230914183831.587273-32-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/jsm/jsm_neo.c | 4 ++-- - drivers/tty/serial/jsm/jsm_tty.c | 16 ++++++++-------- - 2 files changed, 10 insertions(+), 10 deletions(-) - ---- a/drivers/tty/serial/jsm/jsm_neo.c -+++ b/drivers/tty/serial/jsm/jsm_neo.c -@@ -816,9 +816,9 @@ static void neo_parse_isr(struct jsm_boa - /* Parse any modem signal changes */ - jsm_dbg(INTR, &ch->ch_bd->pci_dev, - "MOD_STAT: sending to parse_modem_sigs\n"); -- spin_lock_irqsave(&ch->uart_port.lock, lock_flags); -+ uart_port_lock_irqsave(&ch->uart_port, &lock_flags); - neo_parse_modem(ch, readb(&ch->ch_neo_uart->msr)); -- spin_unlock_irqrestore(&ch->uart_port.lock, lock_flags); -+ uart_port_unlock_irqrestore(&ch->uart_port, lock_flags); - } - } - ---- a/drivers/tty/serial/jsm/jsm_tty.c -+++ b/drivers/tty/serial/jsm/jsm_tty.c -@@ -152,14 +152,14 @@ static void jsm_tty_send_xchar(struct ua - container_of(port, struct jsm_channel, uart_port); - struct ktermios *termios; - -- spin_lock_irqsave(&port->lock, lock_flags); -+ uart_port_lock_irqsave(port, &lock_flags); - termios = &port->state->port.tty->termios; - if (ch == termios->c_cc[VSTART]) - channel->ch_bd->bd_ops->send_start_character(channel); - - if (ch == termios->c_cc[VSTOP]) - channel->ch_bd->bd_ops->send_stop_character(channel); -- spin_unlock_irqrestore(&port->lock, lock_flags); -+ uart_port_unlock_irqrestore(port, lock_flags); - } - - static void jsm_tty_stop_rx(struct uart_port *port) -@@ -176,13 +176,13 @@ static void jsm_tty_break(struct uart_po - struct jsm_channel *channel = - container_of(port, struct jsm_channel, uart_port); - -- spin_lock_irqsave(&port->lock, lock_flags); -+ uart_port_lock_irqsave(port, &lock_flags); - if (break_state == -1) - channel->ch_bd->bd_ops->send_break(channel); - else - channel->ch_bd->bd_ops->clear_break(channel); - -- spin_unlock_irqrestore(&port->lock, lock_flags); -+ uart_port_unlock_irqrestore(port, lock_flags); - } - - static int jsm_tty_open(struct uart_port *port) -@@ -241,7 +241,7 @@ static int jsm_tty_open(struct uart_port - channel->ch_cached_lsr = 0; - channel->ch_stops_sent = 0; - -- spin_lock_irqsave(&port->lock, lock_flags); -+ uart_port_lock_irqsave(port, &lock_flags); - termios = &port->state->port.tty->termios; - channel->ch_c_cflag = termios->c_cflag; - channel->ch_c_iflag = termios->c_iflag; -@@ -261,7 +261,7 @@ static int jsm_tty_open(struct uart_port - jsm_carrier(channel); - - channel->ch_open_count++; -- spin_unlock_irqrestore(&port->lock, lock_flags); -+ uart_port_unlock_irqrestore(port, lock_flags); - - jsm_dbg(OPEN, &channel->ch_bd->pci_dev, "finish\n"); - return 0; -@@ -307,7 +307,7 @@ static void jsm_tty_set_termios(struct u - struct jsm_channel *channel = - container_of(port, struct jsm_channel, uart_port); - -- spin_lock_irqsave(&port->lock, lock_flags); -+ uart_port_lock_irqsave(port, &lock_flags); - channel->ch_c_cflag = termios->c_cflag; - channel->ch_c_iflag = termios->c_iflag; - channel->ch_c_oflag = termios->c_oflag; -@@ -317,7 +317,7 @@ static void jsm_tty_set_termios(struct u - - channel->ch_bd->bd_ops->param(channel); - jsm_carrier(channel); -- spin_unlock_irqrestore(&port->lock, lock_flags); -+ uart_port_unlock_irqrestore(port, lock_flags); - } - - static const char *jsm_tty_type(struct uart_port *port) |