diff options
Diffstat (limited to 'debian/patches-rt/0062-serial-sprd-Use-port-lock-wrappers.patch')
| -rw-r--r-- | debian/patches-rt/0062-serial-sprd-Use-port-lock-wrappers.patch | 162 |
1 files changed, 0 insertions, 162 deletions
diff --git a/debian/patches-rt/0062-serial-sprd-Use-port-lock-wrappers.patch b/debian/patches-rt/0062-serial-sprd-Use-port-lock-wrappers.patch deleted file mode 100644 index 5be78db09..000000000 --- a/debian/patches-rt/0062-serial-sprd-Use-port-lock-wrappers.patch +++ /dev/null @@ -1,162 +0,0 @@ -From: Thomas Gleixner <tglx@linutronix.de> -Date: Thu, 14 Sep 2023 20:44:19 +0206 -Subject: [PATCH 062/134] serial: sprd: 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/20230914183831.587273-63-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/sprd_serial.c | 30 +++++++++++++++--------------- - 1 file changed, 15 insertions(+), 15 deletions(-) - ---- a/drivers/tty/serial/sprd_serial.c -+++ b/drivers/tty/serial/sprd_serial.c -@@ -247,7 +247,7 @@ static void sprd_complete_tx_dma(void *d - struct circ_buf *xmit = &port->state->xmit; - unsigned long flags; - -- spin_lock_irqsave(&port->lock, flags); -+ uart_port_lock_irqsave(port, &flags); - dma_unmap_single(port->dev, sp->tx_dma.phys_addr, - sp->tx_dma.trans_len, DMA_TO_DEVICE); - -@@ -260,7 +260,7 @@ static void sprd_complete_tx_dma(void *d - sprd_tx_dma_config(port)) - sp->tx_dma.trans_len = 0; - -- spin_unlock_irqrestore(&port->lock, flags); -+ uart_port_unlock_irqrestore(port, flags); - } - - static int sprd_uart_dma_submit(struct uart_port *port, -@@ -429,13 +429,13 @@ static void sprd_complete_rx_dma(void *d - enum dma_status status; - unsigned long flags; - -- spin_lock_irqsave(&port->lock, flags); -+ uart_port_lock_irqsave(port, &flags); - - status = dmaengine_tx_status(sp->rx_dma.chn, - sp->rx_dma.cookie, &state); - if (status != DMA_COMPLETE) { - sprd_stop_rx(port); -- spin_unlock_irqrestore(&port->lock, flags); -+ uart_port_unlock_irqrestore(port, flags); - return; - } - -@@ -449,7 +449,7 @@ static void sprd_complete_rx_dma(void *d - if (sprd_start_dma_rx(port)) - sprd_stop_rx(port); - -- spin_unlock_irqrestore(&port->lock, flags); -+ uart_port_unlock_irqrestore(port, flags); - } - - static int sprd_start_dma_rx(struct uart_port *port) -@@ -638,12 +638,12 @@ static irqreturn_t sprd_handle_irq(int i - struct uart_port *port = dev_id; - unsigned int ims; - -- spin_lock(&port->lock); -+ uart_port_lock(port); - - ims = serial_in(port, SPRD_IMSR); - - if (!ims) { -- spin_unlock(&port->lock); -+ uart_port_unlock(port); - return IRQ_NONE; - } - -@@ -660,7 +660,7 @@ static irqreturn_t sprd_handle_irq(int i - if (ims & SPRD_IMSR_TX_FIFO_EMPTY) - sprd_tx(port); - -- spin_unlock(&port->lock); -+ uart_port_unlock(port); - - return IRQ_HANDLED; - } -@@ -727,13 +727,13 @@ static int sprd_startup(struct uart_port - serial_out(port, SPRD_CTL1, fc); - - /* enable interrupt */ -- spin_lock_irqsave(&port->lock, flags); -+ uart_port_lock_irqsave(port, &flags); - ien = serial_in(port, SPRD_IEN); - ien |= SPRD_IEN_BREAK_DETECT | SPRD_IEN_TIMEOUT; - if (!sp->rx_dma.enable) - ien |= SPRD_IEN_RX_FULL; - serial_out(port, SPRD_IEN, ien); -- spin_unlock_irqrestore(&port->lock, flags); -+ uart_port_unlock_irqrestore(port, flags); - - return 0; - } -@@ -793,7 +793,7 @@ static void sprd_set_termios(struct uart - lcr |= SPRD_LCR_EVEN_PAR; - } - -- spin_lock_irqsave(&port->lock, flags); -+ uart_port_lock_irqsave(port, &flags); - - /* update the per-port timeout */ - uart_update_timeout(port, termios->c_cflag, baud); -@@ -837,7 +837,7 @@ static void sprd_set_termios(struct uart - fc |= RX_TOUT_THLD_DEF | RX_HFC_THLD_DEF; - serial_out(port, SPRD_CTL1, fc); - -- spin_unlock_irqrestore(&port->lock, flags); -+ uart_port_unlock_irqrestore(port, flags); - - /* Don't rewrite B0 */ - if (tty_termios_baud_rate(termios)) -@@ -974,9 +974,9 @@ static void sprd_console_write(struct co - if (port->sysrq) - locked = 0; - else if (oops_in_progress) -- locked = spin_trylock_irqsave(&port->lock, flags); -+ locked = uart_port_trylock_irqsave(port, &flags); - else -- spin_lock_irqsave(&port->lock, flags); -+ uart_port_lock_irqsave(port, &flags); - - uart_console_write(port, s, count, sprd_console_putchar); - -@@ -984,7 +984,7 @@ static void sprd_console_write(struct co - wait_for_xmitr(port); - - if (locked) -- spin_unlock_irqrestore(&port->lock, flags); -+ uart_port_unlock_irqrestore(port, flags); - } - - static int sprd_console_setup(struct console *co, char *options) |