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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/0040-serial-mps2-uart-Use-port-lock-wrappers.patch | |
parent | Merging upstream version 6.7.7. (diff) | |
download | linux-27d3313807296c3943a96ceef8c2b7279cb56962.tar.xz linux-27d3313807296c3943a96ceef8c2b7279cb56962.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/0040-serial-mps2-uart-Use-port-lock-wrappers.patch')
-rw-r--r-- | debian/patches-rt/0040-serial-mps2-uart-Use-port-lock-wrappers.patch | 103 |
1 files changed, 0 insertions, 103 deletions
diff --git a/debian/patches-rt/0040-serial-mps2-uart-Use-port-lock-wrappers.patch b/debian/patches-rt/0040-serial-mps2-uart-Use-port-lock-wrappers.patch deleted file mode 100644 index a626bdb031..0000000000 --- a/debian/patches-rt/0040-serial-mps2-uart-Use-port-lock-wrappers.patch +++ /dev/null @@ -1,103 +0,0 @@ -From: Thomas Gleixner <tglx@linutronix.de> -Date: Thu, 14 Sep 2023 20:43:57 +0206 -Subject: [PATCH 040/134] serial: mps2-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/20230914183831.587273-41-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/mps2-uart.c | 16 ++++++++-------- - 1 file changed, 8 insertions(+), 8 deletions(-) - ---- a/drivers/tty/serial/mps2-uart.c -+++ b/drivers/tty/serial/mps2-uart.c -@@ -188,12 +188,12 @@ static irqreturn_t mps2_uart_rxirq(int i - if (unlikely(!(irqflag & UARTn_INT_RX))) - return IRQ_NONE; - -- spin_lock(&port->lock); -+ uart_port_lock(port); - - mps2_uart_write8(port, UARTn_INT_RX, UARTn_INT); - mps2_uart_rx_chars(port); - -- spin_unlock(&port->lock); -+ uart_port_unlock(port); - - return IRQ_HANDLED; - } -@@ -206,12 +206,12 @@ static irqreturn_t mps2_uart_txirq(int i - if (unlikely(!(irqflag & UARTn_INT_TX))) - return IRQ_NONE; - -- spin_lock(&port->lock); -+ uart_port_lock(port); - - mps2_uart_write8(port, UARTn_INT_TX, UARTn_INT); - mps2_uart_tx_chars(port); - -- spin_unlock(&port->lock); -+ uart_port_unlock(port); - - return IRQ_HANDLED; - } -@@ -222,7 +222,7 @@ static irqreturn_t mps2_uart_oerrirq(int - struct uart_port *port = data; - u8 irqflag = mps2_uart_read8(port, UARTn_INT); - -- spin_lock(&port->lock); -+ uart_port_lock(port); - - if (irqflag & UARTn_INT_RX_OVERRUN) { - struct tty_port *tport = &port->state->port; -@@ -244,7 +244,7 @@ static irqreturn_t mps2_uart_oerrirq(int - handled = IRQ_HANDLED; - } - -- spin_unlock(&port->lock); -+ uart_port_unlock(port); - - return handled; - } -@@ -356,12 +356,12 @@ mps2_uart_set_termios(struct uart_port * - - bauddiv = DIV_ROUND_CLOSEST(port->uartclk, baud); - -- spin_lock_irqsave(&port->lock, flags); -+ uart_port_lock_irqsave(port, &flags); - - uart_update_timeout(port, termios->c_cflag, baud); - mps2_uart_write32(port, bauddiv, UARTn_BAUDDIV); - -- spin_unlock_irqrestore(&port->lock, flags); -+ uart_port_unlock_irqrestore(port, flags); - - if (tty_termios_baud_rate(termios)) - tty_termios_encode_baud_rate(termios, baud, baud); |