diff options
Diffstat (limited to 'debian/patches-rt/0012-serial-8250_omap-Use-port-lock-wrappers.patch')
-rw-r--r-- | debian/patches-rt/0012-serial-8250_omap-Use-port-lock-wrappers.patch | 236 |
1 files changed, 0 insertions, 236 deletions
diff --git a/debian/patches-rt/0012-serial-8250_omap-Use-port-lock-wrappers.patch b/debian/patches-rt/0012-serial-8250_omap-Use-port-lock-wrappers.patch deleted file mode 100644 index 10ebd70ea0..0000000000 --- a/debian/patches-rt/0012-serial-8250_omap-Use-port-lock-wrappers.patch +++ /dev/null @@ -1,236 +0,0 @@ -From: Thomas Gleixner <tglx@linutronix.de> -Date: Thu, 14 Sep 2023 20:43:29 +0206 -Subject: [PATCH 012/134] serial: 8250_omap: 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/20230914183831.587273-13-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/8250/8250_omap.c | 52 ++++++++++++++++++------------------ - 1 file changed, 26 insertions(+), 26 deletions(-) - ---- a/drivers/tty/serial/8250/8250_omap.c -+++ b/drivers/tty/serial/8250/8250_omap.c -@@ -401,7 +401,7 @@ static void omap_8250_set_termios(struct - * interrupts disabled. - */ - pm_runtime_get_sync(port->dev); -- spin_lock_irq(&port->lock); -+ uart_port_lock_irq(port); - - /* - * Update the per-port timeout. -@@ -504,7 +504,7 @@ static void omap_8250_set_termios(struct - } - omap8250_restore_regs(up); - -- spin_unlock_irq(&up->port.lock); -+ uart_port_unlock_irq(&up->port); - pm_runtime_mark_last_busy(port->dev); - pm_runtime_put_autosuspend(port->dev); - -@@ -529,7 +529,7 @@ static void omap_8250_pm(struct uart_por - pm_runtime_get_sync(port->dev); - - /* Synchronize UART_IER access against the console. */ -- spin_lock_irq(&port->lock); -+ uart_port_lock_irq(port); - - serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); - efr = serial_in(up, UART_EFR); -@@ -541,7 +541,7 @@ static void omap_8250_pm(struct uart_por - serial_out(up, UART_EFR, efr); - serial_out(up, UART_LCR, 0); - -- spin_unlock_irq(&port->lock); -+ uart_port_unlock_irq(port); - - pm_runtime_mark_last_busy(port->dev); - pm_runtime_put_autosuspend(port->dev); -@@ -660,7 +660,7 @@ static irqreturn_t omap8250_irq(int irq, - unsigned long delay; - - /* Synchronize UART_IER access against the console. */ -- spin_lock(&port->lock); -+ uart_port_lock(port); - up->ier = port->serial_in(port, UART_IER); - if (up->ier & (UART_IER_RLSI | UART_IER_RDI)) { - port->ops->stop_rx(port); -@@ -670,7 +670,7 @@ static irqreturn_t omap8250_irq(int irq, - */ - cancel_delayed_work(&up->overrun_backoff); - } -- spin_unlock(&port->lock); -+ uart_port_unlock(port); - - delay = msecs_to_jiffies(up->overrun_backoff_time_ms); - schedule_delayed_work(&up->overrun_backoff, delay); -@@ -717,10 +717,10 @@ static int omap_8250_startup(struct uart - } - - /* Synchronize UART_IER access against the console. */ -- spin_lock_irq(&port->lock); -+ uart_port_lock_irq(port); - up->ier = UART_IER_RLSI | UART_IER_RDI; - serial_out(up, UART_IER, up->ier); -- spin_unlock_irq(&port->lock); -+ uart_port_unlock_irq(port); - - #ifdef CONFIG_PM - up->capabilities |= UART_CAP_RPM; -@@ -733,9 +733,9 @@ static int omap_8250_startup(struct uart - serial_out(up, UART_OMAP_WER, priv->wer); - - if (up->dma && !(priv->habit & UART_HAS_EFR2)) { -- spin_lock_irq(&port->lock); -+ uart_port_lock_irq(port); - up->dma->rx_dma(up); -- spin_unlock_irq(&port->lock); -+ uart_port_unlock_irq(port); - } - - enable_irq(up->port.irq); -@@ -761,10 +761,10 @@ static void omap_8250_shutdown(struct ua - serial_out(up, UART_OMAP_EFR2, 0x0); - - /* Synchronize UART_IER access against the console. */ -- spin_lock_irq(&port->lock); -+ uart_port_lock_irq(port); - up->ier = 0; - serial_out(up, UART_IER, 0); -- spin_unlock_irq(&port->lock); -+ uart_port_unlock_irq(port); - disable_irq_nosync(up->port.irq); - dev_pm_clear_wake_irq(port->dev); - -@@ -789,10 +789,10 @@ static void omap_8250_throttle(struct ua - - pm_runtime_get_sync(port->dev); - -- spin_lock_irqsave(&port->lock, flags); -+ uart_port_lock_irqsave(port, &flags); - port->ops->stop_rx(port); - priv->throttled = true; -- spin_unlock_irqrestore(&port->lock, flags); -+ uart_port_unlock_irqrestore(port, flags); - - pm_runtime_mark_last_busy(port->dev); - pm_runtime_put_autosuspend(port->dev); -@@ -807,14 +807,14 @@ static void omap_8250_unthrottle(struct - pm_runtime_get_sync(port->dev); - - /* Synchronize UART_IER access against the console. */ -- spin_lock_irqsave(&port->lock, flags); -+ uart_port_lock_irqsave(port, &flags); - priv->throttled = false; - if (up->dma) - up->dma->rx_dma(up); - up->ier |= UART_IER_RLSI | UART_IER_RDI; - port->read_status_mask |= UART_LSR_DR; - serial_out(up, UART_IER, up->ier); -- spin_unlock_irqrestore(&port->lock, flags); -+ uart_port_unlock_irqrestore(port, flags); - - pm_runtime_mark_last_busy(port->dev); - pm_runtime_put_autosuspend(port->dev); -@@ -958,7 +958,7 @@ static void __dma_rx_complete(void *para - unsigned long flags; - - /* Synchronize UART_IER access against the console. */ -- spin_lock_irqsave(&p->port.lock, flags); -+ uart_port_lock_irqsave(&p->port, &flags); - - /* - * If the tx status is not DMA_COMPLETE, then this is a delayed -@@ -967,7 +967,7 @@ static void __dma_rx_complete(void *para - */ - if (dmaengine_tx_status(dma->rxchan, dma->rx_cookie, &state) != - DMA_COMPLETE) { -- spin_unlock_irqrestore(&p->port.lock, flags); -+ uart_port_unlock_irqrestore(&p->port, flags); - return; - } - __dma_rx_do_complete(p); -@@ -978,7 +978,7 @@ static void __dma_rx_complete(void *para - omap_8250_rx_dma(p); - } - -- spin_unlock_irqrestore(&p->port.lock, flags); -+ uart_port_unlock_irqrestore(&p->port, flags); - } - - static void omap_8250_rx_dma_flush(struct uart_8250_port *p) -@@ -1083,7 +1083,7 @@ static void omap_8250_dma_tx_complete(vo - dma_sync_single_for_cpu(dma->txchan->device->dev, dma->tx_addr, - UART_XMIT_SIZE, DMA_TO_DEVICE); - -- spin_lock_irqsave(&p->port.lock, flags); -+ uart_port_lock_irqsave(&p->port, &flags); - - dma->tx_running = 0; - -@@ -1112,7 +1112,7 @@ static void omap_8250_dma_tx_complete(vo - serial8250_set_THRI(p); - } - -- spin_unlock_irqrestore(&p->port.lock, flags); -+ uart_port_unlock_irqrestore(&p->port, flags); - } - - static int omap_8250_tx_dma(struct uart_8250_port *p) -@@ -1278,7 +1278,7 @@ static int omap_8250_dma_handle_irq(stru - return IRQ_HANDLED; - } - -- spin_lock(&port->lock); -+ uart_port_lock(port); - - status = serial_port_in(port, UART_LSR); - -@@ -1756,15 +1756,15 @@ static int omap8250_runtime_resume(struc - up = serial8250_get_port(priv->line); - - if (up && omap8250_lost_context(up)) { -- spin_lock_irq(&up->port.lock); -+ uart_port_lock_irq(&up->port); - omap8250_restore_regs(up); -- spin_unlock_irq(&up->port.lock); -+ uart_port_unlock_irq(&up->port); - } - - if (up && up->dma && up->dma->rxchan && !(priv->habit & UART_HAS_EFR2)) { -- spin_lock_irq(&up->port.lock); -+ uart_port_lock_irq(&up->port); - omap_8250_rx_dma(up); -- spin_unlock_irq(&up->port.lock); -+ uart_port_unlock_irq(&up->port); - } - - priv->latency = priv->calc_latency; |