diff options
Diffstat (limited to 'debian/patches-rt/0028-serial-icom-Use-port-lock-wrappers.patch')
| -rw-r--r-- | debian/patches-rt/0028-serial-icom-Use-port-lock-wrappers.patch | 151 |
1 files changed, 0 insertions, 151 deletions
diff --git a/debian/patches-rt/0028-serial-icom-Use-port-lock-wrappers.patch b/debian/patches-rt/0028-serial-icom-Use-port-lock-wrappers.patch deleted file mode 100644 index da765879ce..0000000000 --- a/debian/patches-rt/0028-serial-icom-Use-port-lock-wrappers.patch +++ /dev/null @@ -1,151 +0,0 @@ -From: Thomas Gleixner <tglx@linutronix.de> -Date: Thu, 14 Sep 2023 20:43:45 +0206 -Subject: [PATCH 028/134] serial: icom: 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/20230914183831.587273-29-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/icom.c | 26 +++++++++++++------------- - 1 file changed, 13 insertions(+), 13 deletions(-) - ---- a/drivers/tty/serial/icom.c -+++ b/drivers/tty/serial/icom.c -@@ -929,7 +929,7 @@ static inline void check_modem_status(st - char delta_status; - unsigned char status; - -- spin_lock(&icom_port->uart_port.lock); -+ uart_port_lock(&icom_port->uart_port); - - /*modem input register */ - status = readb(&icom_port->dram->isr); -@@ -951,7 +951,7 @@ static inline void check_modem_status(st - port.delta_msr_wait); - old_status = status; - } -- spin_unlock(&icom_port->uart_port.lock); -+ uart_port_unlock(&icom_port->uart_port); - } - - static void xmit_interrupt(u16 port_int_reg, struct icom_port *icom_port) -@@ -1093,7 +1093,7 @@ static void process_interrupt(u16 port_i - struct icom_port *icom_port) - { - -- spin_lock(&icom_port->uart_port.lock); -+ uart_port_lock(&icom_port->uart_port); - trace(icom_port, "INTERRUPT", port_int_reg); - - if (port_int_reg & (INT_XMIT_COMPLETED | INT_XMIT_DISABLED)) -@@ -1102,7 +1102,7 @@ static void process_interrupt(u16 port_i - if (port_int_reg & INT_RCV_COMPLETED) - recv_interrupt(port_int_reg, icom_port); - -- spin_unlock(&icom_port->uart_port.lock); -+ uart_port_unlock(&icom_port->uart_port); - } - - static irqreturn_t icom_interrupt(int irq, void *dev_id) -@@ -1186,14 +1186,14 @@ static unsigned int icom_tx_empty(struct - int ret; - unsigned long flags; - -- spin_lock_irqsave(&port->lock, flags); -+ uart_port_lock_irqsave(port, &flags); - if (le16_to_cpu(icom_port->statStg->xmit[0].flags) & - SA_FLAGS_READY_TO_XMIT) - ret = TIOCSER_TEMT; - else - ret = 0; - -- spin_unlock_irqrestore(&port->lock, flags); -+ uart_port_unlock_irqrestore(port, flags); - return ret; - } - -@@ -1276,7 +1276,7 @@ static void icom_send_xchar(struct uart_ - - /* wait .1 sec to send char */ - for (index = 0; index < 10; index++) { -- spin_lock_irqsave(&port->lock, flags); -+ uart_port_lock_irqsave(port, &flags); - xdata = readb(&icom_port->dram->xchar); - if (xdata == 0x00) { - trace(icom_port, "QUICK_WRITE", 0); -@@ -1284,10 +1284,10 @@ static void icom_send_xchar(struct uart_ - - /* flush write operation */ - xdata = readb(&icom_port->dram->xchar); -- spin_unlock_irqrestore(&port->lock, flags); -+ uart_port_unlock_irqrestore(port, flags); - break; - } -- spin_unlock_irqrestore(&port->lock, flags); -+ uart_port_unlock_irqrestore(port, flags); - msleep(10); - } - } -@@ -1307,7 +1307,7 @@ static void icom_break(struct uart_port - unsigned char cmdReg; - unsigned long flags; - -- spin_lock_irqsave(&port->lock, flags); -+ uart_port_lock_irqsave(port, &flags); - trace(icom_port, "BREAK", 0); - cmdReg = readb(&icom_port->dram->CmdReg); - if (break_state == -1) { -@@ -1315,7 +1315,7 @@ static void icom_break(struct uart_port - } else { - writeb(cmdReg & ~CMD_SND_BREAK, &icom_port->dram->CmdReg); - } -- spin_unlock_irqrestore(&port->lock, flags); -+ uart_port_unlock_irqrestore(port, flags); - } - - static int icom_open(struct uart_port *port) -@@ -1365,7 +1365,7 @@ static void icom_set_termios(struct uart - unsigned long offset; - unsigned long flags; - -- spin_lock_irqsave(&port->lock, flags); -+ uart_port_lock_irqsave(port, &flags); - trace(icom_port, "CHANGE_SPEED", 0); - - cflag = termios->c_cflag; -@@ -1516,7 +1516,7 @@ static void icom_set_termios(struct uart - trace(icom_port, "XR_ENAB", 0); - writeb(CMD_XMIT_RCV_ENABLE, &icom_port->dram->CmdReg); - -- spin_unlock_irqrestore(&port->lock, flags); -+ uart_port_unlock_irqrestore(port, flags); - } - - static const char *icom_type(struct uart_port *port) |