diff options
Diffstat (limited to 'debian/patches-rt/0015-serial-pch-Don-t-disable-interrupts-while-acquiring-.patch')
| -rw-r--r-- | debian/patches-rt/0015-serial-pch-Don-t-disable-interrupts-while-acquiring-.patch | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/debian/patches-rt/0015-serial-pch-Don-t-disable-interrupts-while-acquiring-.patch b/debian/patches-rt/0015-serial-pch-Don-t-disable-interrupts-while-acquiring-.patch new file mode 100644 index 000000000..aad340f32 --- /dev/null +++ b/debian/patches-rt/0015-serial-pch-Don-t-disable-interrupts-while-acquiring-.patch @@ -0,0 +1,42 @@ +From: Sebastian Andrzej Siewior <bigeasy@linutronix.de> +Date: Fri, 1 Mar 2024 22:45:28 +0100 +Subject: [PATCH 15/18] serial: pch: Don't disable interrupts while acquiring + lock in ISR. +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/6.8/older/patches-6.8.2-rt11.tar.xz + +The interrupt service routine is always invoked with disabled +interrupts. + +Remove the _irqsave() from the locking functions in the interrupts +service routine/ pch_uart_interrupt(). + +Link: https://lore.kernel.org/r/20240301215246.891055-16-bigeasy@linutronix.de +Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> +--- + drivers/tty/serial/pch_uart.c | 5 ++--- + 1 file changed, 2 insertions(+), 3 deletions(-) + +--- a/drivers/tty/serial/pch_uart.c ++++ b/drivers/tty/serial/pch_uart.c +@@ -1010,11 +1010,10 @@ static irqreturn_t pch_uart_interrupt(in + u8 lsr; + int ret = 0; + unsigned char iid; +- unsigned long flags; + int next = 1; + u8 msr; + +- spin_lock_irqsave(&priv->lock, flags); ++ spin_lock(&priv->lock); + handled = 0; + while (next) { + iid = pch_uart_hal_get_iid(priv); +@@ -1074,7 +1073,7 @@ static irqreturn_t pch_uart_interrupt(in + handled |= (unsigned int)ret; + } + +- spin_unlock_irqrestore(&priv->lock, flags); ++ spin_unlock(&priv->lock); + return IRQ_RETVAL(handled); + } + |