diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-18 17:39:59 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-18 17:39:59 +0000 |
commit | 27d3313807296c3943a96ceef8c2b7279cb56962 (patch) | |
tree | 7d08e78c36ab6437b403fc7cd8c23e41f135c7a3 /debian/patches-rt/0049-serial-qcom-geni-Use-port-lock-wrappers.patch | |
parent | Merging upstream version 6.7.7. (diff) | |
download | linux-debian/6.7.7-1.tar.xz linux-debian/6.7.7-1.zip |
Adding debian version 6.7.7-1.debian/6.7.7-1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'debian/patches-rt/0049-serial-qcom-geni-Use-port-lock-wrappers.patch')
-rw-r--r-- | debian/patches-rt/0049-serial-qcom-geni-Use-port-lock-wrappers.patch | 71 |
1 files changed, 0 insertions, 71 deletions
diff --git a/debian/patches-rt/0049-serial-qcom-geni-Use-port-lock-wrappers.patch b/debian/patches-rt/0049-serial-qcom-geni-Use-port-lock-wrappers.patch deleted file mode 100644 index 4f1bc6a1cb..0000000000 --- a/debian/patches-rt/0049-serial-qcom-geni-Use-port-lock-wrappers.patch +++ /dev/null @@ -1,71 +0,0 @@ -From: Thomas Gleixner <tglx@linutronix.de> -Date: Thu, 14 Sep 2023 20:44:06 +0206 -Subject: [PATCH 049/134] serial: qcom-geni: 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> -Reviewed-by: Bjorn Andersson <quic_bjorande@quicinc.com> -Signed-off-by: John Ogness <john.ogness@linutronix.de> -Link: https://lore.kernel.org/r/20230914183831.587273-50-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/qcom_geni_serial.c | 8 ++++---- - 1 file changed, 4 insertions(+), 4 deletions(-) - ---- a/drivers/tty/serial/qcom_geni_serial.c -+++ b/drivers/tty/serial/qcom_geni_serial.c -@@ -482,9 +482,9 @@ static void qcom_geni_serial_console_wri - - uport = &port->uport; - if (oops_in_progress) -- locked = spin_trylock_irqsave(&uport->lock, flags); -+ locked = uart_port_trylock_irqsave(uport, &flags); - else -- spin_lock_irqsave(&uport->lock, flags); -+ uart_port_lock_irqsave(uport, &flags); - - geni_status = readl(uport->membase + SE_GENI_STATUS); - -@@ -520,7 +520,7 @@ static void qcom_geni_serial_console_wri - qcom_geni_serial_setup_tx(uport, port->tx_remaining); - - if (locked) -- spin_unlock_irqrestore(&uport->lock, flags); -+ uart_port_unlock_irqrestore(uport, flags); - } - - static void handle_rx_console(struct uart_port *uport, u32 bytes, bool drop) -@@ -970,7 +970,7 @@ static irqreturn_t qcom_geni_serial_isr( - if (uport->suspended) - return IRQ_NONE; - -- spin_lock(&uport->lock); -+ uart_port_lock(uport); - - m_irq_status = readl(uport->membase + SE_GENI_M_IRQ_STATUS); - s_irq_status = readl(uport->membase + SE_GENI_S_IRQ_STATUS); |