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kernel/irq: Extend lockdep class for request mutex

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The IRQ code already has support for lockdep class for the lock mutex
in an interrupt descriptor. Extend this to add a second class for the
request mutex in the descriptor. Not having a class is resulting in
false positive splats in some code paths.

Signed-off-by: Andrew Lunn <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Acked-by: [email protected]
Cc: [email protected]
Cc: [email protected]
Link: https://lkml.kernel.org/r/[email protected]
This commit is contained in:
Andrew Lunn 2017-12-02 18:11:04 +01:00 • committed by Thomas Gleixner
commit 39c3fd5895
11 changed files with 75 additions and 35 deletions
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4
drivers/mfd/arizona-irq.c
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@ -184,6 +184,7 @@ static struct irq_chip arizona_irq_chip = {
};
static struct lock_class_key arizona_irq_lock_class;
static struct lock_class_key arizona_irq_request_class;
static int arizona_irq_map(struct irq_domain *h, unsigned int virq,
irq_hw_number_t hw)
@ -191,7 +192,8 @@ static int arizona_irq_map(struct irq_domain *h, unsigned int virq,
struct arizona *data = h->host_data;
irq_set_chip_data(virq, data);
irq_set_lockdep_class(virq, &arizona_irq_lock_class);
irq_set_lockdep_class(virq, &arizona_irq_lock_class,
&arizona_irq_request_class);
irq_set_chip_and_handler(virq, &arizona_irq_chip, handle_simple_irq);
irq_set_nested_thread(virq, 1);
irq_set_noprobe(virq);