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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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4
arch/powerpc/sysdev/fsl_msi.c
View file

@ -354,6 +354,7 @@ static int fsl_of_msi_remove(struct platform_device *ofdev)
}
static struct lock_class_key fsl_msi_irq_class;
static struct lock_class_key fsl_msi_irq_request_class;
static int fsl_msi_setup_hwirq(struct fsl_msi *msi, struct platform_device *dev,
int offset, int irq_index)
@ -373,7 +374,8 @@ static int fsl_msi_setup_hwirq(struct fsl_msi *msi, struct platform_device *dev,
dev_err(&dev->dev, "No memory for MSI cascade data\n");
return -ENOMEM;
}
irq_set_lockdep_class(virt_msir, &fsl_msi_irq_class);
irq_set_lockdep_class(virt_msir, &fsl_msi_irq_class,
&fsl_msi_irq_request_class);
cascade_data->index = offset;
cascade_data->msi_data = msi;
cascade_data->virq = virt_msir;

3
drivers/gpio/gpio-bcm-kona.c
View file

@ -522,6 +522,7 @@ static struct of_device_id const bcm_kona_gpio_of_match[] = {
* category than their parents, so it won't report false recursion.
*/
static struct lock_class_key gpio_lock_class;
static struct lock_class_key gpio_request_class;
static int bcm_kona_gpio_irq_map(struct irq_domain *d, unsigned int irq,
irq_hw_number_t hwirq)
@ -531,7 +532,7 @@ static int bcm_kona_gpio_irq_map(struct irq_domain *d, unsigned int irq,
ret = irq_set_chip_data(irq, d->host_data);
if (ret < 0)
return ret;
irq_set_lockdep_class(irq, &gpio_lock_class);
irq_set_lockdep_class(irq, &gpio_lock_class, &gpio_request_class);
irq_set_chip_and_handler(irq, &bcm_gpio_irq_chip, handle_simple_irq);
irq_set_noprobe(irq);

4
drivers/gpio/gpio-brcmstb.c
View file

@ -327,6 +327,7 @@ static struct brcmstb_gpio_bank *brcmstb_gpio_hwirq_to_bank(
* category than their parents, so it won't report false recursion.
*/
static struct lock_class_key brcmstb_gpio_irq_lock_class;
static struct lock_class_key brcmstb_gpio_irq_request_class;
static int brcmstb_gpio_irq_map(struct irq_domain *d, unsigned int irq,
@ -346,7 +347,8 @@ static int brcmstb_gpio_irq_map(struct irq_domain *d, unsigned int irq,
ret = irq_set_chip_data(irq, &bank->gc);
if (ret < 0)
return ret;
irq_set_lockdep_class(irq, &brcmstb_gpio_irq_lock_class);
irq_set_lockdep_class(irq, &brcmstb_gpio_irq_lock_class,
&brcmstb_gpio_irq_lock_class);
irq_set_chip_and_handler(irq, &priv->irq_chip, handle_level_irq);
irq_set_noprobe(irq);
return 0;

4
drivers/gpio/gpio-tegra.c
View file

@ -565,6 +565,7 @@ static const struct dev_pm_ops tegra_gpio_pm_ops = {
* than their parents, so it won't report false recursion.
*/
static struct lock_class_key gpio_lock_class;
static struct lock_class_key gpio_request_class;
static int tegra_gpio_probe(struct platform_device *pdev)
{
@ -670,7 +671,8 @@ static int tegra_gpio_probe(struct platform_device *pdev)
bank = &tgi->bank_info[GPIO_BANK(gpio)];
irq_set_lockdep_class(irq, &gpio_lock_class);
irq_set_lockdep_class(irq, &gpio_lock_class,
&gpio_request_class);
irq_set_chip_data(irq, bank);
irq_set_chip_and_handler(irq, &tgi->ic, handle_simple_irq);
}

27
drivers/gpio/gpiolib.c
View file

@ -73,7 +73,8 @@ LIST_HEAD(gpio_devices);
static void gpiochip_free_hogs(struct gpio_chip *chip);
static int gpiochip_add_irqchip(struct gpio_chip *gpiochip,
struct lock_class_key *key);
struct lock_class_key *lock_key,
struct lock_class_key *request_key);
static void gpiochip_irqchip_remove(struct gpio_chip *gpiochip);
static int gpiochip_irqchip_init_valid_mask(struct gpio_chip *gpiochip);
static void gpiochip_irqchip_free_valid_mask(struct gpio_chip *gpiochip);
@ -1100,7 +1101,8 @@ static void gpiochip_setup_devs(void)
}
int gpiochip_add_data_with_key(struct gpio_chip *chip, void *data,
struct lock_class_key *key)
struct lock_class_key *lock_key,
struct lock_class_key *request_key)
{
unsigned long flags;
int status = 0;
@ -1246,7 +1248,7 @@ int gpiochip_add_data_with_key(struct gpio_chip *chip, void *data,
if (status)
goto err_remove_from_list;
status = gpiochip_add_irqchip(chip, key);
status = gpiochip_add_irqchip(chip, lock_key, request_key);
if (status)
goto err_remove_chip;
@ -1632,7 +1634,7 @@ int gpiochip_irq_map(struct irq_domain *d, unsigned int irq,
* This lock class tells lockdep that GPIO irqs are in a different
* category than their parents, so it won't report false recursion.
*/
irq_set_lockdep_class(irq, chip->irq.lock_key);
irq_set_lockdep_class(irq, chip->irq.lock_key, chip->irq.request_key);
irq_set_chip_and_handler(irq, chip->irq.chip, chip->irq.handler);
/* Chips that use nested thread handlers have them marked */
if (chip->irq.threaded)
@ -1712,10 +1714,12 @@ static int gpiochip_to_irq(struct gpio_chip *chip, unsigned offset)
/**
* gpiochip_add_irqchip() - adds an IRQ chip to a GPIO chip
* @gpiochip: the GPIO chip to add the IRQ chip to
* @lock_key: lockdep class
* @lock_key: lockdep class for IRQ lock
* @request_key: lockdep class for IRQ request
*/
static int gpiochip_add_irqchip(struct gpio_chip *gpiochip,
struct lock_class_key *lock_key)
struct lock_class_key *lock_key,
struct lock_class_key *request_key)
{
struct irq_chip *irqchip = gpiochip->irq.chip;
const struct irq_domain_ops *ops;
@ -1753,6 +1757,7 @@ static int gpiochip_add_irqchip(struct gpio_chip *gpiochip,
gpiochip->to_irq = gpiochip_to_irq;
gpiochip->irq.default_type = type;
gpiochip->irq.lock_key = lock_key;
gpiochip->irq.request_key = request_key;
if (gpiochip->irq.domain_ops)
ops = gpiochip->irq.domain_ops;
@ -1850,7 +1855,8 @@ static void gpiochip_irqchip_remove(struct gpio_chip *gpiochip)
* @type: the default type for IRQs on this irqchip, pass IRQ_TYPE_NONE
* to have the core avoid setting up any default type in the hardware.
* @threaded: whether this irqchip uses a nested thread handler
* @lock_key: lockdep class
* @lock_key: lockdep class for IRQ lock
* @request_key: lockdep class for IRQ request
*
* This function closely associates a certain irqchip with a certain
* gpiochip, providing an irq domain to translate the local IRQs to
@ -1872,7 +1878,8 @@ int gpiochip_irqchip_add_key(struct gpio_chip *gpiochip,
irq_flow_handler_t handler,
unsigned int type,
bool threaded,
struct lock_class_key *lock_key)
struct lock_class_key *lock_key,
struct lock_class_key *request_key)
{
struct device_node *of_node;
@ -1913,6 +1920,7 @@ int gpiochip_irqchip_add_key(struct gpio_chip *gpiochip,
gpiochip->irq.default_type = type;
gpiochip->to_irq = gpiochip_to_irq;
gpiochip->irq.lock_key = lock_key;
gpiochip->irq.request_key = request_key;
gpiochip->irq.domain = irq_domain_add_simple(of_node,
gpiochip->ngpio, first_irq,
&gpiochip_domain_ops, gpiochip);
@ -1940,7 +1948,8 @@ EXPORT_SYMBOL_GPL(gpiochip_irqchip_add_key);
#else /* CONFIG_GPIOLIB_IRQCHIP */
static inline int gpiochip_add_irqchip(struct gpio_chip *gpiochip,
struct lock_class_key *key)
struct lock_class_key *lock_key,
struct lock_class_key *request_key)
{
return 0;
}

6
drivers/irqchip/irq-renesas-intc-irqpin.c
View file

@ -342,6 +342,9 @@ static irqreturn_t intc_irqpin_shared_irq_handler(int irq, void *dev_id)
*/
static struct lock_class_key intc_irqpin_irq_lock_class;
/* And this is for the request mutex */
static struct lock_class_key intc_irqpin_irq_request_class;
static int intc_irqpin_irq_domain_map(struct irq_domain *h, unsigned int virq,
irq_hw_number_t hw)
{
@ -352,7 +355,8 @@ static int intc_irqpin_irq_domain_map(struct irq_domain *h, unsigned int virq,
intc_irqpin_dbg(&p->irq[hw], "map");
irq_set_chip_data(virq, h->host_data);
irq_set_lockdep_class(virq, &intc_irqpin_irq_lock_class);
irq_set_lockdep_class(virq, &intc_irqpin_irq_lock_class,
&intc_irqpin_irq_request_class);
irq_set_chip_and_handler(virq, &p->irq_chip, handle_level_irq);
return 0;
}

4
drivers/mfd/arizona-irq.c
View file

@ -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);

5
drivers/pinctrl/pinctrl-single.c
View file

@ -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;

33
include/linux/gpio/driver.h
View file

@ -66,9 +66,10 @@ struct gpio_irq_chip {
/**
* @lock_key:
*
* Per GPIO IRQ chip lockdep class.
* Per GPIO IRQ chip lockdep classes.
*/
struct lock_class_key *lock_key;
struct lock_class_key *request_key;
/**
* @parent_handler:
@ -323,7 +324,8 @@ extern const char *gpiochip_is_requested(struct gpio_chip *chip,
/* add/remove chips */
extern int gpiochip_add_data_with_key(struct gpio_chip *chip, void *data,
struct lock_class_key *lock_key);
struct lock_class_key *lock_key,
struct lock_class_key *request_key);
/**
* gpiochip_add_data() - register a gpio_chip
@ -350,11 +352,13 @@ extern int gpiochip_add_data_with_key(struct gpio_chip *chip, void *data,
*/
#ifdef CONFIG_LOCKDEP
#define gpiochip_add_data(chip, data) ({ \
static struct lock_class_key key; \
gpiochip_add_data_with_key(chip, data, &key); \
static struct lock_class_key lock_key; \
static struct lock_class_key request_key; \
gpiochip_add_data_with_key(chip, data, &lock_key, \
&request_key); \
})
#else
#define gpiochip_add_data(chip, data) gpiochip_add_data_with_key(chip, data, NULL)
#define gpiochip_add_data(chip, data) gpiochip_add_data_with_key(chip, data, NULL, NULL)
#endif
static inline int gpiochip_add(struct gpio_chip *chip)
@ -429,7 +433,8 @@ int gpiochip_irqchip_add_key(struct gpio_chip *gpiochip,
irq_flow_handler_t handler,
unsigned int type,
bool threaded,
struct lock_class_key *lock_key);
struct lock_class_key *lock_key,
struct lock_class_key *request_key);
#ifdef CONFIG_LOCKDEP
@ -445,10 +450,12 @@ static inline int gpiochip_irqchip_add(struct gpio_chip *gpiochip,
irq_flow_handler_t handler,
unsigned int type)
{
static struct lock_class_key key;
static struct lock_class_key lock_key;
static struct lock_class_key request_key;
return gpiochip_irqchip_add_key(gpiochip, irqchip, first_irq,
handler, type, false, &key);
handler, type, false,
&lock_key, &request_key);
}
static inline int gpiochip_irqchip_add_nested(struct gpio_chip *gpiochip,
@ -458,10 +465,12 @@ static inline int gpiochip_irqchip_add_nested(struct gpio_chip *gpiochip,
unsigned int type)
{
static struct lock_class_key key;
static struct lock_class_key lock_key;
static struct lock_class_key request_key;
return gpiochip_irqchip_add_key(gpiochip, irqchip, first_irq,
handler, type, true, &key);
handler, type, true,
&lock_key, &request_key);
}
#else
static inline int gpiochip_irqchip_add(struct gpio_chip *gpiochip,
@ -471,7 +480,7 @@ static inline int gpiochip_irqchip_add(struct gpio_chip *gpiochip,
unsigned int type)
{
return gpiochip_irqchip_add_key(gpiochip, irqchip, first_irq,
handler, type, false, NULL);
handler, type, false, NULL, NULL);
}
static inline int gpiochip_irqchip_add_nested(struct gpio_chip *gpiochip,
@ -481,7 +490,7 @@ static inline int gpiochip_irqchip_add_nested(struct gpio_chip *gpiochip,
unsigned int type)
{
return gpiochip_irqchip_add_key(gpiochip, irqchip, first_irq,
handler, type, true, NULL);
handler, type, true, NULL, NULL);
}
#endif /* CONFIG_LOCKDEP */

9
include/linux/irqdesc.h
View file

@ -255,12 +255,15 @@ static inline bool irq_is_percpu_devid(unsigned int irq)
}
static inline void
irq_set_lockdep_class(unsigned int irq, struct lock_class_key *class)
irq_set_lockdep_class(unsigned int irq, struct lock_class_key *lock_class,
struct lock_class_key *request_class)
{
struct irq_desc *desc = irq_to_desc(irq);
if (desc)
lockdep_set_class(&desc->lock, class);
if (desc) {
lockdep_set_class(&desc->lock, lock_class);
lockdep_set_class(&desc->request_mutex, request_class);
}
}
#ifdef CONFIG_IRQ_PREFLOW_FASTEOI

11
kernel/irq/generic-chip.c
View file

@ -364,10 +364,11 @@ irq_get_domain_generic_chip(struct irq_domain *d, unsigned int hw_irq)
EXPORT_SYMBOL_GPL(irq_get_domain_generic_chip);
/*
* Separate lockdep class for interrupt chip which can nest irq_desc
* lock.
* Separate lockdep classes for interrupt chip which can nest irq_desc
* lock and request mutex.
*/
static struct lock_class_key irq_nested_lock_class;
static struct lock_class_key irq_nested_request_class;
/*
* irq_map_generic_chip - Map a generic chip for an irq domain
@ -409,7 +410,8 @@ int irq_map_generic_chip(struct irq_domain *d, unsigned int virq,
set_bit(idx, &gc->installed);
if (dgc->gc_flags & IRQ_GC_INIT_NESTED_LOCK)
irq_set_lockdep_class(virq, &irq_nested_lock_class);
irq_set_lockdep_class(virq, &irq_nested_lock_class,
&irq_nested_request_class);
if (chip->irq_calc_mask)
chip->irq_calc_mask(data);
@ -479,7 +481,8 @@ void irq_setup_generic_chip(struct irq_chip_generic *gc, u32 msk,
continue;
if (flags & IRQ_GC_INIT_NESTED_LOCK)
irq_set_lockdep_class(i, &irq_nested_lock_class);
irq_set_lockdep_class(i, &irq_nested_lock_class,
&irq_nested_request_class);
if (!(flags & IRQ_GC_NO_MASK)) {
struct irq_data *d = irq_get_irq_data(i);