diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-18 17:39:59 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-18 17:39:59 +0000 |
commit | 27d3313807296c3943a96ceef8c2b7279cb56962 (patch) | |
tree | 7d08e78c36ab6437b403fc7cd8c23e41f135c7a3 /debian/patches-rt/0036-serial-men_z135_uart-Use-port-lock-wrappers.patch | |
parent | Merging upstream version 6.7.7. (diff) | |
download | linux-debian/6.7.7-1.tar.xz linux-debian/6.7.7-1.zip |
Adding debian version 6.7.7-1.debian/6.7.7-1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'debian/patches-rt/0036-serial-men_z135_uart-Use-port-lock-wrappers.patch')
-rw-r--r-- | debian/patches-rt/0036-serial-men_z135_uart-Use-port-lock-wrappers.patch | 76 |
1 files changed, 0 insertions, 76 deletions
diff --git a/debian/patches-rt/0036-serial-men_z135_uart-Use-port-lock-wrappers.patch b/debian/patches-rt/0036-serial-men_z135_uart-Use-port-lock-wrappers.patch deleted file mode 100644 index 11019689b6..0000000000 --- a/debian/patches-rt/0036-serial-men_z135_uart-Use-port-lock-wrappers.patch +++ /dev/null @@ -1,76 +0,0 @@ -From: Thomas Gleixner <tglx@linutronix.de> -Date: Thu, 14 Sep 2023 20:43:53 +0206 -Subject: [PATCH 036/134] serial: men_z135_uart: 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/20230914183831.587273-37-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/men_z135_uart.c | 8 ++++---- - 1 file changed, 4 insertions(+), 4 deletions(-) - ---- a/drivers/tty/serial/men_z135_uart.c -+++ b/drivers/tty/serial/men_z135_uart.c -@@ -392,7 +392,7 @@ static irqreturn_t men_z135_intr(int irq - if (!irq_id) - goto out; - -- spin_lock(&port->lock); -+ uart_port_lock(port); - /* It's save to write to IIR[7:6] RXC[9:8] */ - iowrite8(irq_id, port->membase + MEN_Z135_STAT_REG); - -@@ -418,7 +418,7 @@ static irqreturn_t men_z135_intr(int irq - handled = true; - } - -- spin_unlock(&port->lock); -+ uart_port_unlock(port); - out: - return IRQ_RETVAL(handled); - } -@@ -708,7 +708,7 @@ static void men_z135_set_termios(struct - - baud = uart_get_baud_rate(port, termios, old, 0, uart_freq / 16); - -- spin_lock_irq(&port->lock); -+ uart_port_lock_irq(port); - if (tty_termios_baud_rate(termios)) - tty_termios_encode_baud_rate(termios, baud, baud); - -@@ -716,7 +716,7 @@ static void men_z135_set_termios(struct - iowrite32(bd_reg, port->membase + MEN_Z135_BAUD_REG); - - uart_update_timeout(port, termios->c_cflag, baud); -- spin_unlock_irq(&port->lock); -+ uart_port_unlock_irq(port); - } - - static const char *men_z135_type(struct uart_port *port) |