diff options
Diffstat (limited to 'debian/patches-rt/0017-serial-pch-Remove-eg20t_port-lock.patch')
| -rw-r--r-- | debian/patches-rt/0017-serial-pch-Remove-eg20t_port-lock.patch | 128 |
1 files changed, 0 insertions, 128 deletions
diff --git a/debian/patches-rt/0017-serial-pch-Remove-eg20t_port-lock.patch b/debian/patches-rt/0017-serial-pch-Remove-eg20t_port-lock.patch deleted file mode 100644 index 9ca34a103..000000000 --- a/debian/patches-rt/0017-serial-pch-Remove-eg20t_port-lock.patch +++ /dev/null @@ -1,128 +0,0 @@ -From: Sebastian Andrzej Siewior <bigeasy@linutronix.de> -Date: Fri, 1 Mar 2024 22:45:30 +0100 -Subject: [PATCH 17/18] serial: pch: Remove eg20t_port::lock. -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/6.8/older/patches-6.8.2-rt11.tar.xz - -The struct eg20t_port has a spinlock_t which is used for locking while -access I/O of the device. Then there is the uart_portlock which is -sometimes and nests within eg20t_port's lock. - -The uart_port lock is not used while using the struct in -pch_uart_hal_read() which might be okay. Then both locks are used in -pch_console_write() which looks odd especially the double try_lock part. - -All in all it looks like the uart_port's lock could replace eg20t_port's -lock and simplify the code. - -Remove eg20t_port::lock and use uart_port's lock for the lock scope. - -Link: https://lore.kernel.org/r/20240301215246.891055-18-bigeasy@linutronix.de -Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> ---- - drivers/tty/serial/pch_uart.c | 26 ++++++-------------------- - 1 file changed, 6 insertions(+), 20 deletions(-) - ---- a/drivers/tty/serial/pch_uart.c -+++ b/drivers/tty/serial/pch_uart.c -@@ -237,9 +237,6 @@ struct eg20t_port { - - #define IRQ_NAME_SIZE 17 - char irq_name[IRQ_NAME_SIZE]; -- -- /* protect the eg20t_port private structure and io access to membase */ -- spinlock_t lock; - }; - - /** -@@ -1013,7 +1010,7 @@ static irqreturn_t pch_uart_interrupt(in - int next = 1; - u8 msr; - -- spin_lock(&priv->lock); -+ uart_port_lock(&priv->port); - handled = 0; - while (next) { - iid = pch_uart_hal_get_iid(priv); -@@ -1073,7 +1070,7 @@ static irqreturn_t pch_uart_interrupt(in - handled |= (unsigned int)ret; - } - -- spin_unlock(&priv->lock); -+ uart_port_unlock(&priv->port); - return IRQ_RETVAL(handled); - } - -@@ -1184,9 +1181,9 @@ static void pch_uart_break_ctl(struct ua - unsigned long flags; - - priv = container_of(port, struct eg20t_port, port); -- spin_lock_irqsave(&priv->lock, flags); -+ uart_port_lock_irqsave(&priv->port, &flags); - pch_uart_hal_set_break(priv, ctl); -- spin_unlock_irqrestore(&priv->lock, flags); -+ uart_port_unlock_irqrestore(&priv->port, flags); - } - - /* Grab any interrupt resources and initialise any low level driver state. */ -@@ -1336,8 +1333,7 @@ static void pch_uart_set_termios(struct - - baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk / 16); - -- spin_lock_irqsave(&priv->lock, flags); -- uart_port_lock(port); -+ uart_port_lock_irqsave(port, &flags); - - uart_update_timeout(port, termios->c_cflag, baud); - rtn = pch_uart_hal_set_line(priv, baud, parity, bits, stb); -@@ -1350,8 +1346,7 @@ static void pch_uart_set_termios(struct - tty_termios_encode_baud_rate(termios, baud, baud); - - out: -- uart_port_unlock(port); -- spin_unlock_irqrestore(&priv->lock, flags); -+ uart_port_unlock_irqrestore(port, flags); - } - - static const char *pch_uart_type(struct uart_port *port) -@@ -1555,7 +1550,6 @@ pch_console_write(struct console *co, co - { - struct eg20t_port *priv; - unsigned long flags; -- int priv_locked = 1; - int port_locked = 1; - u8 ier; - -@@ -1565,15 +1559,11 @@ pch_console_write(struct console *co, co - - local_irq_save(flags); - if (priv->port.sysrq) { -- /* call to uart_handle_sysrq_char already took the priv lock */ -- priv_locked = 0; - /* serial8250_handle_port() already took the port lock */ - port_locked = 0; - } else if (oops_in_progress) { -- priv_locked = spin_trylock(&priv->lock); - port_locked = uart_port_trylock(&priv->port); - } else { -- spin_lock(&priv->lock); - uart_port_lock(&priv->port); - } - -@@ -1595,8 +1585,6 @@ pch_console_write(struct console *co, co - - if (port_locked) - uart_port_unlock(&priv->port); -- if (priv_locked) -- spin_unlock(&priv->lock); - local_irq_restore(flags); - } - -@@ -1694,8 +1682,6 @@ static struct eg20t_port *pch_uart_init_ - pci_enable_msi(pdev); - pci_set_master(pdev); - -- spin_lock_init(&priv->lock); -- - iobase = pci_resource_start(pdev, 0); - mapbase = pci_resource_start(pdev, 1); - priv->mapbase = mapbase; |