diff options
Diffstat (limited to 'debian/patches-rt/0046-serial-pic32-Use-port-lock-wrappers.patch')
| -rw-r--r-- | debian/patches-rt/0046-serial-pic32-Use-port-lock-wrappers.patch | 118 |
1 files changed, 0 insertions, 118 deletions
diff --git a/debian/patches-rt/0046-serial-pic32-Use-port-lock-wrappers.patch b/debian/patches-rt/0046-serial-pic32-Use-port-lock-wrappers.patch deleted file mode 100644 index 7cb8da7d8..000000000 --- a/debian/patches-rt/0046-serial-pic32-Use-port-lock-wrappers.patch +++ /dev/null @@ -1,118 +0,0 @@ -From: Thomas Gleixner <tglx@linutronix.de> -Date: Thu, 14 Sep 2023 20:44:03 +0206 -Subject: [PATCH 046/134] serial: pic32: 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/20230914183831.587273-47-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/pic32_uart.c | 20 ++++++++++---------- - 1 file changed, 10 insertions(+), 10 deletions(-) - ---- a/drivers/tty/serial/pic32_uart.c -+++ b/drivers/tty/serial/pic32_uart.c -@@ -243,7 +243,7 @@ static void pic32_uart_break_ctl(struct - struct pic32_sport *sport = to_pic32_sport(port); - unsigned long flags; - -- spin_lock_irqsave(&port->lock, flags); -+ uart_port_lock_irqsave(port, &flags); - - if (ctl) - pic32_uart_writel(sport, PIC32_SET(PIC32_UART_STA), -@@ -252,7 +252,7 @@ static void pic32_uart_break_ctl(struct - pic32_uart_writel(sport, PIC32_CLR(PIC32_UART_STA), - PIC32_UART_STA_UTXBRK); - -- spin_unlock_irqrestore(&port->lock, flags); -+ uart_port_unlock_irqrestore(port, flags); - } - - /* get port type in string format */ -@@ -274,7 +274,7 @@ static void pic32_uart_do_rx(struct uart - */ - max_count = PIC32_UART_RX_FIFO_DEPTH; - -- spin_lock(&port->lock); -+ uart_port_lock(port); - - tty = &port->state->port; - -@@ -331,7 +331,7 @@ static void pic32_uart_do_rx(struct uart - - } while (--max_count); - -- spin_unlock(&port->lock); -+ uart_port_unlock(port); - - tty_flip_buffer_push(tty); - } -@@ -410,9 +410,9 @@ static irqreturn_t pic32_uart_tx_interru - struct uart_port *port = dev_id; - unsigned long flags; - -- spin_lock_irqsave(&port->lock, flags); -+ uart_port_lock_irqsave(port, &flags); - pic32_uart_do_tx(port); -- spin_unlock_irqrestore(&port->lock, flags); -+ uart_port_unlock_irqrestore(port, flags); - - return IRQ_HANDLED; - } -@@ -580,9 +580,9 @@ static void pic32_uart_shutdown(struct u - unsigned long flags; - - /* disable uart */ -- spin_lock_irqsave(&port->lock, flags); -+ uart_port_lock_irqsave(port, &flags); - pic32_uart_dsbl_and_mask(port); -- spin_unlock_irqrestore(&port->lock, flags); -+ uart_port_unlock_irqrestore(port, flags); - clk_disable_unprepare(sport->clk); - - /* free all 3 interrupts for this UART */ -@@ -604,7 +604,7 @@ static void pic32_uart_set_termios(struc - unsigned int quot; - unsigned long flags; - -- spin_lock_irqsave(&port->lock, flags); -+ uart_port_lock_irqsave(port, &flags); - - /* disable uart and mask all interrupts while changing speed */ - pic32_uart_dsbl_and_mask(port); -@@ -672,7 +672,7 @@ static void pic32_uart_set_termios(struc - /* enable uart */ - pic32_uart_en_and_unmask(port); - -- spin_unlock_irqrestore(&port->lock, flags); -+ uart_port_unlock_irqrestore(port, flags); - } - - /* serial core request to claim uart iomem */ |