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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 <andrew@lunn.ch>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: linus.walleij@linaro.org
Cc: grygorii.strashko@ti.com
Cc: f.fainelli@gmail.com
Link: https://lkml.kernel.org/r/1512234664-21555-1-git-send-email-andrew@lunn.ch
This commit is contained in:
Andrew Lunn
2017-12-02 18:11:04 +01:00
committed by Thomas Gleixner
parent beacbc68ac
commit 39c3fd5895
11 changed files with 75 additions and 35 deletions
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5
drivers/pinctrl/pinctrl-single.c
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@@ -222,6 +222,9 @@ static enum pin_config_param pcs_bias[] = {
*/
static struct lock_class_key pcs_lock_class;
/* Class for the IRQ request mutex */
static struct lock_class_key pcs_request_class;
/*
* REVISIT: Reads and writes could eventually use regmap or something
* generic. But at least on omaps, some mux registers are performance
@@ -1486,7 +1489,7 @@ static int pcs_irqdomain_map(struct irq_domain *d, unsigned int irq,
irq_set_chip_data(irq, pcs_soc);
irq_set_chip_and_handler(irq, &pcs->chip,
handle_level_irq);
irq_set_lockdep_class(irq, &pcs_lock_class);
irq_set_lockdep_class(irq, &pcs_lock_class, &pcs_request_class);
irq_set_noprobe(irq);
return 0;