hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

gpio: mlxbf2: Use generic_handle_irq_safe() 

On PREEMPT_RT enabled kernels the demultiplex interrupt handler is force
threaded and runs with interrupts enabled. The invocation of
generic_handle_irq() with interrupts enabled triggers a lockdep warning due
to a non-irq safe lock acquisition.

Instead of disabling interrupts on the driver level, use
generic_handle_domain_irq_safe().

[ tglx: Split out from combo patch ]

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/YnkfWFzvusFFktSt@linutronix.de
This commit is contained in:
Sebastian Andrzej Siewior 2022-09-19 14:45:18 +02:00 committed by Thomas Gleixner
parent c6a91405ac
commit 118c3ba24d
1 changed files with 2 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/gpio/gpio-mlxbf2.c
View File

@ -273,10 +273,8 @@ static irqreturn_t mlxbf2_gpio_irq_handler(int irq, void *ptr)
pending = readl(gs->gpio_io + YU_GPIO_CAUSE_OR_CAUSE_EVTEN0);
writel(pending, gs->gpio_io + YU_GPIO_CAUSE_OR_CLRCAUSE);
for_each_set_bit(level, &pending, gc->ngpio) {
int gpio_irq = irq_find_mapping(gc->irq.domain, level);
generic_handle_irq(gpio_irq);
}
for_each_set_bit(level, &pending, gc->ngpio)
generic_handle_domain_irq_safe(gc->irq.domain, level);
return IRQ_RETVAL(pending);
}