diff options
Diffstat (limited to 'debian/patches-rt/0051-serial-rp2-Use-port-lock-wrappers.patch')
| -rw-r--r-- | debian/patches-rt/0051-serial-rp2-Use-port-lock-wrappers.patch | 114 |
1 files changed, 0 insertions, 114 deletions
diff --git a/debian/patches-rt/0051-serial-rp2-Use-port-lock-wrappers.patch b/debian/patches-rt/0051-serial-rp2-Use-port-lock-wrappers.patch deleted file mode 100644 index e2009ff4c..000000000 --- a/debian/patches-rt/0051-serial-rp2-Use-port-lock-wrappers.patch +++ /dev/null @@ -1,114 +0,0 @@ -From: Thomas Gleixner <tglx@linutronix.de> -Date: Thu, 14 Sep 2023 20:44:08 +0206 -Subject: [PATCH 051/134] serial: rp2: 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/20230914183831.587273-52-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/rp2.c | 20 ++++++++++---------- - 1 file changed, 10 insertions(+), 10 deletions(-) - ---- a/drivers/tty/serial/rp2.c -+++ b/drivers/tty/serial/rp2.c -@@ -276,9 +276,9 @@ static unsigned int rp2_uart_tx_empty(st - * But the TXEMPTY bit doesn't seem to work unless the TX IRQ is - * enabled. - */ -- spin_lock_irqsave(&up->port.lock, flags); -+ uart_port_lock_irqsave(&up->port, &flags); - tx_fifo_bytes = readw(up->base + RP2_TX_FIFO_COUNT); -- spin_unlock_irqrestore(&up->port.lock, flags); -+ uart_port_unlock_irqrestore(&up->port, flags); - - return tx_fifo_bytes ? 0 : TIOCSER_TEMT; - } -@@ -323,10 +323,10 @@ static void rp2_uart_break_ctl(struct ua - { - unsigned long flags; - -- spin_lock_irqsave(&port->lock, flags); -+ uart_port_lock_irqsave(port, &flags); - rp2_rmw(port_to_up(port), RP2_TXRX_CTL, RP2_TXRX_CTL_BREAK_m, - break_state ? RP2_TXRX_CTL_BREAK_m : 0); -- spin_unlock_irqrestore(&port->lock, flags); -+ uart_port_unlock_irqrestore(port, flags); - } - - static void rp2_uart_enable_ms(struct uart_port *port) -@@ -383,7 +383,7 @@ static void rp2_uart_set_termios(struct - if (tty_termios_baud_rate(new)) - tty_termios_encode_baud_rate(new, baud, baud); - -- spin_lock_irqsave(&port->lock, flags); -+ uart_port_lock_irqsave(port, &flags); - - /* ignore all characters if CREAD is not set */ - port->ignore_status_mask = (new->c_cflag & CREAD) ? 0 : RP2_DUMMY_READ; -@@ -391,7 +391,7 @@ static void rp2_uart_set_termios(struct - __rp2_uart_set_termios(up, new->c_cflag, new->c_iflag, baud_div); - uart_update_timeout(port, new->c_cflag, baud); - -- spin_unlock_irqrestore(&port->lock, flags); -+ uart_port_unlock_irqrestore(port, flags); - } - - static void rp2_rx_chars(struct rp2_uart_port *up) -@@ -440,7 +440,7 @@ static void rp2_ch_interrupt(struct rp2_ - { - u32 status; - -- spin_lock(&up->port.lock); -+ uart_port_lock(&up->port); - - /* - * The IRQ status bits are clear-on-write. Other status bits in -@@ -456,7 +456,7 @@ static void rp2_ch_interrupt(struct rp2_ - if (status & RP2_CHAN_STAT_MS_CHANGED_MASK) - wake_up_interruptible(&up->port.state->port.delta_msr_wait); - -- spin_unlock(&up->port.lock); -+ uart_port_unlock(&up->port); - } - - static int rp2_asic_interrupt(struct rp2_card *card, unsigned int asic_id) -@@ -516,10 +516,10 @@ static void rp2_uart_shutdown(struct uar - - rp2_uart_break_ctl(port, 0); - -- spin_lock_irqsave(&port->lock, flags); -+ uart_port_lock_irqsave(port, &flags); - rp2_mask_ch_irq(up, up->idx, 0); - rp2_rmw(up, RP2_CHAN_STAT, 0, 0); -- spin_unlock_irqrestore(&port->lock, flags); -+ uart_port_unlock_irqrestore(port, flags); - } - - static const char *rp2_uart_type(struct uart_port *port) |