diff options
Diffstat (limited to 'debian/patches-rt/0074-serial-xilinx_uartps-Use-port-lock-wrappers.patch')
-rw-r--r-- | debian/patches-rt/0074-serial-xilinx_uartps-Use-port-lock-wrappers.patch | 276 |
1 files changed, 0 insertions, 276 deletions
diff --git a/debian/patches-rt/0074-serial-xilinx_uartps-Use-port-lock-wrappers.patch b/debian/patches-rt/0074-serial-xilinx_uartps-Use-port-lock-wrappers.patch deleted file mode 100644 index 307ee6df75..0000000000 --- a/debian/patches-rt/0074-serial-xilinx_uartps-Use-port-lock-wrappers.patch +++ /dev/null @@ -1,276 +0,0 @@ -From: Thomas Gleixner <tglx@linutronix.de> -Date: Thu, 14 Sep 2023 20:44:31 +0206 -Subject: [PATCH 074/134] serial: xilinx_uartps: 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/20230914183831.587273-75-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/xilinx_uartps.c | 56 ++++++++++++++++++------------------- - 1 file changed, 28 insertions(+), 28 deletions(-) - ---- a/drivers/tty/serial/xilinx_uartps.c -+++ b/drivers/tty/serial/xilinx_uartps.c -@@ -346,7 +346,7 @@ static irqreturn_t cdns_uart_isr(int irq - struct uart_port *port = (struct uart_port *)dev_id; - unsigned int isrstatus; - -- spin_lock(&port->lock); -+ uart_port_lock(port); - - /* Read the interrupt status register to determine which - * interrupt(s) is/are active and clear them. -@@ -369,7 +369,7 @@ static irqreturn_t cdns_uart_isr(int irq - !(readl(port->membase + CDNS_UART_CR) & CDNS_UART_CR_RX_DIS)) - cdns_uart_handle_rx(dev_id, isrstatus); - -- spin_unlock(&port->lock); -+ uart_port_unlock(port); - return IRQ_HANDLED; - } - -@@ -506,14 +506,14 @@ static int cdns_uart_clk_notifier_cb(str - return NOTIFY_BAD; - } - -- spin_lock_irqsave(&cdns_uart->port->lock, flags); -+ uart_port_lock_irqsave(cdns_uart->port, &flags); - - /* Disable the TX and RX to set baud rate */ - ctrl_reg = readl(port->membase + CDNS_UART_CR); - ctrl_reg |= CDNS_UART_CR_TX_DIS | CDNS_UART_CR_RX_DIS; - writel(ctrl_reg, port->membase + CDNS_UART_CR); - -- spin_unlock_irqrestore(&cdns_uart->port->lock, flags); -+ uart_port_unlock_irqrestore(cdns_uart->port, flags); - - return NOTIFY_OK; - } -@@ -523,7 +523,7 @@ static int cdns_uart_clk_notifier_cb(str - * frequency. - */ - -- spin_lock_irqsave(&cdns_uart->port->lock, flags); -+ uart_port_lock_irqsave(cdns_uart->port, &flags); - - locked = 1; - port->uartclk = ndata->new_rate; -@@ -533,7 +533,7 @@ static int cdns_uart_clk_notifier_cb(str - fallthrough; - case ABORT_RATE_CHANGE: - if (!locked) -- spin_lock_irqsave(&cdns_uart->port->lock, flags); -+ uart_port_lock_irqsave(cdns_uart->port, &flags); - - /* Set TX/RX Reset */ - ctrl_reg = readl(port->membase + CDNS_UART_CR); -@@ -555,7 +555,7 @@ static int cdns_uart_clk_notifier_cb(str - ctrl_reg |= CDNS_UART_CR_TX_EN | CDNS_UART_CR_RX_EN; - writel(ctrl_reg, port->membase + CDNS_UART_CR); - -- spin_unlock_irqrestore(&cdns_uart->port->lock, flags); -+ uart_port_unlock_irqrestore(cdns_uart->port, flags); - - return NOTIFY_OK; - default: -@@ -652,7 +652,7 @@ static void cdns_uart_break_ctl(struct u - unsigned int status; - unsigned long flags; - -- spin_lock_irqsave(&port->lock, flags); -+ uart_port_lock_irqsave(port, &flags); - - status = readl(port->membase + CDNS_UART_CR); - -@@ -664,7 +664,7 @@ static void cdns_uart_break_ctl(struct u - writel(CDNS_UART_CR_STOPBRK | status, - port->membase + CDNS_UART_CR); - } -- spin_unlock_irqrestore(&port->lock, flags); -+ uart_port_unlock_irqrestore(port, flags); - } - - /** -@@ -683,7 +683,7 @@ static void cdns_uart_set_termios(struct - unsigned long flags; - unsigned int ctrl_reg, mode_reg; - -- spin_lock_irqsave(&port->lock, flags); -+ uart_port_lock_irqsave(port, &flags); - - /* Disable the TX and RX to set baud rate */ - ctrl_reg = readl(port->membase + CDNS_UART_CR); -@@ -794,7 +794,7 @@ static void cdns_uart_set_termios(struct - cval &= ~CDNS_UART_MODEMCR_FCM; - writel(cval, port->membase + CDNS_UART_MODEMCR); - -- spin_unlock_irqrestore(&port->lock, flags); -+ uart_port_unlock_irqrestore(port, flags); - } - - /** -@@ -813,7 +813,7 @@ static int cdns_uart_startup(struct uart - - is_brk_support = cdns_uart->quirks & CDNS_UART_RXBS_SUPPORT; - -- spin_lock_irqsave(&port->lock, flags); -+ uart_port_lock_irqsave(port, &flags); - - /* Disable the TX and RX */ - writel(CDNS_UART_CR_TX_DIS | CDNS_UART_CR_RX_DIS, -@@ -861,7 +861,7 @@ static int cdns_uart_startup(struct uart - writel(readl(port->membase + CDNS_UART_ISR), - port->membase + CDNS_UART_ISR); - -- spin_unlock_irqrestore(&port->lock, flags); -+ uart_port_unlock_irqrestore(port, flags); - - ret = request_irq(port->irq, cdns_uart_isr, 0, CDNS_UART_NAME, port); - if (ret) { -@@ -889,7 +889,7 @@ static void cdns_uart_shutdown(struct ua - int status; - unsigned long flags; - -- spin_lock_irqsave(&port->lock, flags); -+ uart_port_lock_irqsave(port, &flags); - - /* Disable interrupts */ - status = readl(port->membase + CDNS_UART_IMR); -@@ -900,7 +900,7 @@ static void cdns_uart_shutdown(struct ua - writel(CDNS_UART_CR_TX_DIS | CDNS_UART_CR_RX_DIS, - port->membase + CDNS_UART_CR); - -- spin_unlock_irqrestore(&port->lock, flags); -+ uart_port_unlock_irqrestore(port, flags); - - free_irq(port->irq, port); - } -@@ -1050,7 +1050,7 @@ static int cdns_uart_poll_get_char(struc - int c; - unsigned long flags; - -- spin_lock_irqsave(&port->lock, flags); -+ uart_port_lock_irqsave(port, &flags); - - /* Check if FIFO is empty */ - if (readl(port->membase + CDNS_UART_SR) & CDNS_UART_SR_RXEMPTY) -@@ -1058,7 +1058,7 @@ static int cdns_uart_poll_get_char(struc - else /* Read a character */ - c = (unsigned char) readl(port->membase + CDNS_UART_FIFO); - -- spin_unlock_irqrestore(&port->lock, flags); -+ uart_port_unlock_irqrestore(port, flags); - - return c; - } -@@ -1067,7 +1067,7 @@ static void cdns_uart_poll_put_char(stru - { - unsigned long flags; - -- spin_lock_irqsave(&port->lock, flags); -+ uart_port_lock_irqsave(port, &flags); - - /* Wait until FIFO is empty */ - while (!(readl(port->membase + CDNS_UART_SR) & CDNS_UART_SR_TXEMPTY)) -@@ -1080,7 +1080,7 @@ static void cdns_uart_poll_put_char(stru - while (!(readl(port->membase + CDNS_UART_SR) & CDNS_UART_SR_TXEMPTY)) - cpu_relax(); - -- spin_unlock_irqrestore(&port->lock, flags); -+ uart_port_unlock_irqrestore(port, flags); - } - #endif - -@@ -1232,9 +1232,9 @@ static void cdns_uart_console_write(stru - 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); - - /* save and disable interrupt */ - imr = readl(port->membase + CDNS_UART_IMR); -@@ -1257,7 +1257,7 @@ static void cdns_uart_console_write(stru - writel(imr, port->membase + CDNS_UART_IER); - - if (locked) -- spin_unlock_irqrestore(&port->lock, flags); -+ uart_port_unlock_irqrestore(port, flags); - } - - /** -@@ -1325,7 +1325,7 @@ static int cdns_uart_suspend(struct devi - if (console_suspend_enabled && uart_console(port) && may_wake) { - unsigned long flags; - -- spin_lock_irqsave(&port->lock, flags); -+ uart_port_lock_irqsave(port, &flags); - /* Empty the receive FIFO 1st before making changes */ - while (!(readl(port->membase + CDNS_UART_SR) & - CDNS_UART_SR_RXEMPTY)) -@@ -1334,7 +1334,7 @@ static int cdns_uart_suspend(struct devi - writel(1, port->membase + CDNS_UART_RXWM); - /* disable RX timeout interrups */ - writel(CDNS_UART_IXR_TOUT, port->membase + CDNS_UART_IDR); -- spin_unlock_irqrestore(&port->lock, flags); -+ uart_port_unlock_irqrestore(port, flags); - } - - /* -@@ -1372,7 +1372,7 @@ static int cdns_uart_resume(struct devic - return ret; - } - -- spin_lock_irqsave(&port->lock, flags); -+ uart_port_lock_irqsave(port, &flags); - - /* Set TX/RX Reset */ - ctrl_reg = readl(port->membase + CDNS_UART_CR); -@@ -1392,14 +1392,14 @@ static int cdns_uart_resume(struct devic - - clk_disable(cdns_uart->uartclk); - clk_disable(cdns_uart->pclk); -- spin_unlock_irqrestore(&port->lock, flags); -+ uart_port_unlock_irqrestore(port, flags); - } else { -- spin_lock_irqsave(&port->lock, flags); -+ uart_port_lock_irqsave(port, &flags); - /* restore original rx trigger level */ - writel(rx_trigger_level, port->membase + CDNS_UART_RXWM); - /* enable RX timeout interrupt */ - writel(CDNS_UART_IXR_TOUT, port->membase + CDNS_UART_IER); -- spin_unlock_irqrestore(&port->lock, flags); -+ uart_port_unlock_irqrestore(port, flags); - } - - return uart_resume_port(cdns_uart->cdns_uart_driver, port); |