diff options
Diffstat (limited to '')
| -rw-r--r-- | debian/patches-rt/0052-serial-sa1100-Use-port-lock-wrappers.patch | 117 |
1 files changed, 0 insertions, 117 deletions
diff --git a/debian/patches-rt/0052-serial-sa1100-Use-port-lock-wrappers.patch b/debian/patches-rt/0052-serial-sa1100-Use-port-lock-wrappers.patch deleted file mode 100644 index 2f8073a485..0000000000 --- a/debian/patches-rt/0052-serial-sa1100-Use-port-lock-wrappers.patch +++ /dev/null @@ -1,117 +0,0 @@ -From: Thomas Gleixner <tglx@linutronix.de> -Date: Thu, 14 Sep 2023 20:44:09 +0206 -Subject: [PATCH 052/134] serial: sa1100: 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/20230914183831.587273-53-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/sa1100.c | 20 ++++++++++---------- - 1 file changed, 10 insertions(+), 10 deletions(-) - ---- a/drivers/tty/serial/sa1100.c -+++ b/drivers/tty/serial/sa1100.c -@@ -115,9 +115,9 @@ static void sa1100_timeout(struct timer_ - unsigned long flags; - - if (sport->port.state) { -- spin_lock_irqsave(&sport->port.lock, flags); -+ uart_port_lock_irqsave(&sport->port, &flags); - sa1100_mctrl_check(sport); -- spin_unlock_irqrestore(&sport->port.lock, flags); -+ uart_port_unlock_irqrestore(&sport->port, flags); - - mod_timer(&sport->timer, jiffies + MCTRL_TIMEOUT); - } -@@ -247,7 +247,7 @@ static irqreturn_t sa1100_int(int irq, v - struct sa1100_port *sport = dev_id; - unsigned int status, pass_counter = 0; - -- spin_lock(&sport->port.lock); -+ uart_port_lock(&sport->port); - status = UART_GET_UTSR0(sport); - status &= SM_TO_UTSR0(sport->port.read_status_mask) | ~UTSR0_TFS; - do { -@@ -276,7 +276,7 @@ static irqreturn_t sa1100_int(int irq, v - status &= SM_TO_UTSR0(sport->port.read_status_mask) | - ~UTSR0_TFS; - } while (status & (UTSR0_TFS | UTSR0_RFS | UTSR0_RID)); -- spin_unlock(&sport->port.lock); -+ uart_port_unlock(&sport->port); - - return IRQ_HANDLED; - } -@@ -321,14 +321,14 @@ static void sa1100_break_ctl(struct uart - unsigned long flags; - unsigned int utcr3; - -- spin_lock_irqsave(&sport->port.lock, flags); -+ uart_port_lock_irqsave(&sport->port, &flags); - utcr3 = UART_GET_UTCR3(sport); - if (break_state == -1) - utcr3 |= UTCR3_BRK; - else - utcr3 &= ~UTCR3_BRK; - UART_PUT_UTCR3(sport, utcr3); -- spin_unlock_irqrestore(&sport->port.lock, flags); -+ uart_port_unlock_irqrestore(&sport->port, flags); - } - - static int sa1100_startup(struct uart_port *port) -@@ -354,9 +354,9 @@ static int sa1100_startup(struct uart_po - /* - * Enable modem status interrupts - */ -- spin_lock_irq(&sport->port.lock); -+ uart_port_lock_irq(&sport->port); - sa1100_enable_ms(&sport->port); -- spin_unlock_irq(&sport->port.lock); -+ uart_port_unlock_irq(&sport->port); - - return 0; - } -@@ -423,7 +423,7 @@ sa1100_set_termios(struct uart_port *por - - del_timer_sync(&sport->timer); - -- spin_lock_irqsave(&sport->port.lock, flags); -+ uart_port_lock_irqsave(&sport->port, &flags); - - sport->port.read_status_mask &= UTSR0_TO_SM(UTSR0_TFS); - sport->port.read_status_mask |= UTSR1_TO_SM(UTSR1_ROR); -@@ -485,7 +485,7 @@ sa1100_set_termios(struct uart_port *por - if (UART_ENABLE_MS(&sport->port, termios->c_cflag)) - sa1100_enable_ms(&sport->port); - -- spin_unlock_irqrestore(&sport->port.lock, flags); -+ uart_port_unlock_irqrestore(&sport->port, flags); - } - - static const char *sa1100_type(struct uart_port *port) |