diff options
Diffstat (limited to 'debian/patches-rt/0026-serial-linflexuart-Use-port-lock-wrappers.patch')
| -rw-r--r-- | debian/patches-rt/0026-serial-linflexuart-Use-port-lock-wrappers.patch | 143 |
1 files changed, 0 insertions, 143 deletions
diff --git a/debian/patches-rt/0026-serial-linflexuart-Use-port-lock-wrappers.patch b/debian/patches-rt/0026-serial-linflexuart-Use-port-lock-wrappers.patch deleted file mode 100644 index e2a3628ae..000000000 --- a/debian/patches-rt/0026-serial-linflexuart-Use-port-lock-wrappers.patch +++ /dev/null @@ -1,143 +0,0 @@ -From: Thomas Gleixner <tglx@linutronix.de> -Date: Thu, 14 Sep 2023 20:43:43 +0206 -Subject: [PATCH 026/134] serial: linflexuart: 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/20230914183831.587273-27-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/fsl_linflexuart.c | 26 +++++++++++++------------- - 1 file changed, 13 insertions(+), 13 deletions(-) - ---- a/drivers/tty/serial/fsl_linflexuart.c -+++ b/drivers/tty/serial/fsl_linflexuart.c -@@ -203,7 +203,7 @@ static irqreturn_t linflex_txint(int irq - struct circ_buf *xmit = &sport->state->xmit; - unsigned long flags; - -- spin_lock_irqsave(&sport->lock, flags); -+ uart_port_lock_irqsave(sport, &flags); - - if (sport->x_char) { - linflex_put_char(sport, sport->x_char); -@@ -217,7 +217,7 @@ static irqreturn_t linflex_txint(int irq - - linflex_transmit_buffer(sport); - out: -- spin_unlock_irqrestore(&sport->lock, flags); -+ uart_port_unlock_irqrestore(sport, flags); - return IRQ_HANDLED; - } - -@@ -230,7 +230,7 @@ static irqreturn_t linflex_rxint(int irq - unsigned char rx; - bool brk; - -- spin_lock_irqsave(&sport->lock, flags); -+ uart_port_lock_irqsave(sport, &flags); - - status = readl(sport->membase + UARTSR); - while (status & LINFLEXD_UARTSR_RMB) { -@@ -266,7 +266,7 @@ static irqreturn_t linflex_rxint(int irq - } - } - -- spin_unlock_irqrestore(&sport->lock, flags); -+ uart_port_unlock_irqrestore(sport, flags); - - tty_flip_buffer_push(port); - -@@ -369,11 +369,11 @@ static int linflex_startup(struct uart_p - int ret = 0; - unsigned long flags; - -- spin_lock_irqsave(&port->lock, flags); -+ uart_port_lock_irqsave(port, &flags); - - linflex_setup_watermark(port); - -- spin_unlock_irqrestore(&port->lock, flags); -+ uart_port_unlock_irqrestore(port, flags); - - ret = devm_request_irq(port->dev, port->irq, linflex_int, 0, - DRIVER_NAME, port); -@@ -386,14 +386,14 @@ static void linflex_shutdown(struct uart - unsigned long ier; - unsigned long flags; - -- spin_lock_irqsave(&port->lock, flags); -+ uart_port_lock_irqsave(port, &flags); - - /* disable interrupts */ - ier = readl(port->membase + LINIER); - ier &= ~(LINFLEXD_LINIER_DRIE | LINFLEXD_LINIER_DTIE); - writel(ier, port->membase + LINIER); - -- spin_unlock_irqrestore(&port->lock, flags); -+ uart_port_unlock_irqrestore(port, flags); - - devm_free_irq(port->dev, port->irq, port); - } -@@ -474,7 +474,7 @@ linflex_set_termios(struct uart_port *po - cr &= ~LINFLEXD_UARTCR_PCE; - } - -- spin_lock_irqsave(&port->lock, flags); -+ uart_port_lock_irqsave(port, &flags); - - port->read_status_mask = 0; - -@@ -507,7 +507,7 @@ linflex_set_termios(struct uart_port *po - - writel(cr1, port->membase + LINCR1); - -- spin_unlock_irqrestore(&port->lock, flags); -+ uart_port_unlock_irqrestore(port, flags); - } - - static const char *linflex_type(struct uart_port *port) -@@ -646,14 +646,14 @@ linflex_console_write(struct console *co - if (sport->sysrq) - locked = 0; - else if (oops_in_progress) -- locked = spin_trylock_irqsave(&sport->lock, flags); -+ locked = uart_port_trylock_irqsave(sport, &flags); - else -- spin_lock_irqsave(&sport->lock, flags); -+ uart_port_lock_irqsave(sport, &flags); - - linflex_string_write(sport, s, count); - - if (locked) -- spin_unlock_irqrestore(&sport->lock, flags); -+ uart_port_unlock_irqrestore(sport, flags); - } - - /* |