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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/0050-serial-rda-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/0050-serial-rda-Use-port-lock-wrappers.patch')
-rw-r--r-- | debian/patches-rt/0050-serial-rda-Use-port-lock-wrappers.patch | 177 |
1 files changed, 0 insertions, 177 deletions
diff --git a/debian/patches-rt/0050-serial-rda-Use-port-lock-wrappers.patch b/debian/patches-rt/0050-serial-rda-Use-port-lock-wrappers.patch deleted file mode 100644 index 6d51972bcd..0000000000 --- a/debian/patches-rt/0050-serial-rda-Use-port-lock-wrappers.patch +++ /dev/null @@ -1,177 +0,0 @@ -From: Thomas Gleixner <tglx@linutronix.de> -Date: Thu, 14 Sep 2023 20:44:07 +0206 -Subject: [PATCH 050/134] serial: rda: 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/20230914183831.587273-51-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/rda-uart.c | 34 +++++++++++++++++----------------- - 1 file changed, 17 insertions(+), 17 deletions(-) - ---- a/drivers/tty/serial/rda-uart.c -+++ b/drivers/tty/serial/rda-uart.c -@@ -139,12 +139,12 @@ static unsigned int rda_uart_tx_empty(st - unsigned int ret; - u32 val; - -- spin_lock_irqsave(&port->lock, flags); -+ uart_port_lock_irqsave(port, &flags); - - val = rda_uart_read(port, RDA_UART_STATUS); - ret = (val & RDA_UART_TX_FIFO_MASK) ? TIOCSER_TEMT : 0; - -- spin_unlock_irqrestore(&port->lock, flags); -+ uart_port_unlock_irqrestore(port, flags); - - return ret; - } -@@ -246,7 +246,7 @@ static void rda_uart_set_termios(struct - unsigned int baud; - u32 irq_mask; - -- spin_lock_irqsave(&port->lock, flags); -+ uart_port_lock_irqsave(port, &flags); - - baud = uart_get_baud_rate(port, termios, old, 9600, port->uartclk / 4); - rda_uart_change_baudrate(rda_port, baud); -@@ -325,7 +325,7 @@ static void rda_uart_set_termios(struct - /* update the per-port timeout */ - uart_update_timeout(port, termios->c_cflag, baud); - -- spin_unlock_irqrestore(&port->lock, flags); -+ uart_port_unlock_irqrestore(port, flags); - } - - static void rda_uart_send_chars(struct uart_port *port) -@@ -408,7 +408,7 @@ static irqreturn_t rda_interrupt(int irq - unsigned long flags; - u32 val, irq_mask; - -- spin_lock_irqsave(&port->lock, flags); -+ uart_port_lock_irqsave(port, &flags); - - /* Clear IRQ cause */ - val = rda_uart_read(port, RDA_UART_IRQ_CAUSE); -@@ -425,7 +425,7 @@ static irqreturn_t rda_interrupt(int irq - rda_uart_send_chars(port); - } - -- spin_unlock_irqrestore(&port->lock, flags); -+ uart_port_unlock_irqrestore(port, flags); - - return IRQ_HANDLED; - } -@@ -436,16 +436,16 @@ static int rda_uart_startup(struct uart_ - int ret; - u32 val; - -- spin_lock_irqsave(&port->lock, flags); -+ uart_port_lock_irqsave(port, &flags); - rda_uart_write(port, 0, RDA_UART_IRQ_MASK); -- spin_unlock_irqrestore(&port->lock, flags); -+ uart_port_unlock_irqrestore(port, flags); - - ret = request_irq(port->irq, rda_interrupt, IRQF_NO_SUSPEND, - "rda-uart", port); - if (ret) - return ret; - -- spin_lock_irqsave(&port->lock, flags); -+ uart_port_lock_irqsave(port, &flags); - - val = rda_uart_read(port, RDA_UART_CTRL); - val |= RDA_UART_ENABLE; -@@ -456,7 +456,7 @@ static int rda_uart_startup(struct uart_ - val |= (RDA_UART_RX_DATA_AVAILABLE | RDA_UART_RX_TIMEOUT); - rda_uart_write(port, val, RDA_UART_IRQ_MASK); - -- spin_unlock_irqrestore(&port->lock, flags); -+ uart_port_unlock_irqrestore(port, flags); - - return 0; - } -@@ -466,7 +466,7 @@ static void rda_uart_shutdown(struct uar - unsigned long flags; - u32 val; - -- spin_lock_irqsave(&port->lock, flags); -+ uart_port_lock_irqsave(port, &flags); - - rda_uart_stop_tx(port); - rda_uart_stop_rx(port); -@@ -475,7 +475,7 @@ static void rda_uart_shutdown(struct uar - val &= ~RDA_UART_ENABLE; - rda_uart_write(port, val, RDA_UART_CTRL); - -- spin_unlock_irqrestore(&port->lock, flags); -+ uart_port_unlock_irqrestore(port, flags); - } - - static const char *rda_uart_type(struct uart_port *port) -@@ -515,7 +515,7 @@ static void rda_uart_config_port(struct - rda_uart_request_port(port); - } - -- spin_lock_irqsave(&port->lock, irq_flags); -+ uart_port_lock_irqsave(port, &irq_flags); - - /* Clear mask, so no surprise interrupts. */ - rda_uart_write(port, 0, RDA_UART_IRQ_MASK); -@@ -523,7 +523,7 @@ static void rda_uart_config_port(struct - /* Clear status register */ - rda_uart_write(port, 0, RDA_UART_STATUS); - -- spin_unlock_irqrestore(&port->lock, irq_flags); -+ uart_port_unlock_irqrestore(port, irq_flags); - } - - static void rda_uart_release_port(struct uart_port *port) -@@ -597,9 +597,9 @@ static void rda_uart_port_write(struct u - if (port->sysrq) { - locked = 0; - } else if (oops_in_progress) { -- locked = spin_trylock(&port->lock); -+ locked = uart_port_trylock(port); - } else { -- spin_lock(&port->lock); -+ uart_port_lock(port); - locked = 1; - } - -@@ -615,7 +615,7 @@ static void rda_uart_port_write(struct u - rda_uart_write(port, old_irq_mask, RDA_UART_IRQ_MASK); - - if (locked) -- spin_unlock(&port->lock); -+ uart_port_unlock(port); - - local_irq_restore(flags); - } |