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gpio: aspeed: Convert aspeed_gpio.lock to raw_spinlock 

[ Upstream commit 61a7904b6a ]

The gpio-aspeed driver implements an irq_chip which need to be invoked
from hardirq context. Since spin_lock() can sleep with PREEMPT_RT, it is
no longer legal to invoke it while interrupts are disabled.
This also causes lockdep to complain about:
[    0.649797] [ BUG: Invalid wait context ]
because aspeed_gpio.lock (spin_lock_t) is taken under irq_desc.lock
(raw_spinlock_t).
Let's use of raw_spinlock_t instead of spinlock_t.

Signed-off-by: Iwona Winiarska <iwona.winiarska@intel.com>
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Iwona Winiarska 2021-12-04 18:10:26 +01:00 committed by Greg Kroah-Hartman
parent 743911a2bf
commit 2481ee0ce5
1 changed files with 26 additions and 26 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

52
drivers/gpio/gpio-aspeed.c
View File

@ -53,7 +53,7 @@ struct aspeed_gpio_config {
struct aspeed_gpio {
struct gpio_chip chip;
struct irq_chip irqc;
spinlock_t lock;
raw_spinlock_t lock;
void __iomem *base;
int irq;
const struct aspeed_gpio_config *config;
@ -413,14 +413,14 @@ static void aspeed_gpio_set(struct gpio_chip *gc, unsigned int offset,
unsigned long flags;
bool copro;
spin_lock_irqsave(&gpio->lock, flags);
raw_spin_lock_irqsave(&gpio->lock, flags);
copro = aspeed_gpio_copro_request(gpio, offset);
__aspeed_gpio_set(gc, offset, val);
if (copro)
aspeed_gpio_copro_release(gpio, offset);
spin_unlock_irqrestore(&gpio->lock, flags);
raw_spin_unlock_irqrestore(&gpio->lock, flags);
}
static int aspeed_gpio_dir_in(struct gpio_chip *gc, unsigned int offset)
@ -435,7 +435,7 @@ static int aspeed_gpio_dir_in(struct gpio_chip *gc, unsigned int offset)
if (!have_input(gpio, offset))
return -ENOTSUPP;
spin_lock_irqsave(&gpio->lock, flags);
raw_spin_lock_irqsave(&gpio->lock, flags);
reg = ioread32(addr);
reg &= ~GPIO_BIT(offset);
@ -445,7 +445,7 @@ static int aspeed_gpio_dir_in(struct gpio_chip *gc, unsigned int offset)
if (copro)
aspeed_gpio_copro_release(gpio, offset);
spin_unlock_irqrestore(&gpio->lock, flags);
raw_spin_unlock_irqrestore(&gpio->lock, flags);
return 0;
}
@ -463,7 +463,7 @@ static int aspeed_gpio_dir_out(struct gpio_chip *gc,
if (!have_output(gpio, offset))
return -ENOTSUPP;
spin_lock_irqsave(&gpio->lock, flags);
raw_spin_lock_irqsave(&gpio->lock, flags);
reg = ioread32(addr);
reg |= GPIO_BIT(offset);
@ -474,7 +474,7 @@ static int aspeed_gpio_dir_out(struct gpio_chip *gc,
if (copro)
aspeed_gpio_copro_release(gpio, offset);
spin_unlock_irqrestore(&gpio->lock, flags);
raw_spin_unlock_irqrestore(&gpio->lock, flags);
return 0;
}
@ -492,11 +492,11 @@ static int aspeed_gpio_get_direction(struct gpio_chip *gc, unsigned int offset)
if (!have_output(gpio, offset))
return 1;
spin_lock_irqsave(&gpio->lock, flags);
raw_spin_lock_irqsave(&gpio->lock, flags);
val = ioread32(bank_reg(gpio, bank, reg_dir)) & GPIO_BIT(offset);
spin_unlock_irqrestore(&gpio->lock, flags);
raw_spin_unlock_irqrestore(&gpio->lock, flags);
return !val;
@ -540,14 +540,14 @@ static void aspeed_gpio_irq_ack(struct irq_data *d)
status_addr = bank_reg(gpio, bank, reg_irq_status);
spin_lock_irqsave(&gpio->lock, flags);
raw_spin_lock_irqsave(&gpio->lock, flags);
copro = aspeed_gpio_copro_request(gpio, offset);
iowrite32(bit, status_addr);
if (copro)
aspeed_gpio_copro_release(gpio, offset);
spin_unlock_irqrestore(&gpio->lock, flags);
raw_spin_unlock_irqrestore(&gpio->lock, flags);
}
static void aspeed_gpio_irq_set_mask(struct irq_data *d, bool set)
@ -566,7 +566,7 @@ static void aspeed_gpio_irq_set_mask(struct irq_data *d, bool set)
addr = bank_reg(gpio, bank, reg_irq_enable);
spin_lock_irqsave(&gpio->lock, flags);
raw_spin_lock_irqsave(&gpio->lock, flags);
copro = aspeed_gpio_copro_request(gpio, offset);
reg = ioread32(addr);
@ -578,7 +578,7 @@ static void aspeed_gpio_irq_set_mask(struct irq_data *d, bool set)
if (copro)
aspeed_gpio_copro_release(gpio, offset);
spin_unlock_irqrestore(&gpio->lock, flags);
raw_spin_unlock_irqrestore(&gpio->lock, flags);
}
static void aspeed_gpio_irq_mask(struct irq_data *d)
@ -630,7 +630,7 @@ static int aspeed_gpio_set_type(struct irq_data *d, unsigned int type)
return -EINVAL;
}
spin_lock_irqsave(&gpio->lock, flags);
raw_spin_lock_irqsave(&gpio->lock, flags);
copro = aspeed_gpio_copro_request(gpio, offset);
addr = bank_reg(gpio, bank, reg_irq_type0);
@ -650,7 +650,7 @@ static int aspeed_gpio_set_type(struct irq_data *d, unsigned int type)
if (copro)
aspeed_gpio_copro_release(gpio, offset);
spin_unlock_irqrestore(&gpio->lock, flags);
raw_spin_unlock_irqrestore(&gpio->lock, flags);
irq_set_handler_locked(d, handler);
@ -720,7 +720,7 @@ static int aspeed_gpio_reset_tolerance(struct gpio_chip *chip,
treg = bank_reg(gpio, to_bank(offset), reg_tolerance);
spin_lock_irqsave(&gpio->lock, flags);
raw_spin_lock_irqsave(&gpio->lock, flags);
copro = aspeed_gpio_copro_request(gpio, offset);
val = readl(treg);
@ -734,7 +734,7 @@ static int aspeed_gpio_reset_tolerance(struct gpio_chip *chip,
if (copro)
aspeed_gpio_copro_release(gpio, offset);
spin_unlock_irqrestore(&gpio->lock, flags);
raw_spin_unlock_irqrestore(&gpio->lock, flags);
return 0;
}
@ -860,7 +860,7 @@ static int enable_debounce(struct gpio_chip *chip, unsigned int offset,
return rc;
}
spin_lock_irqsave(&gpio->lock, flags);
raw_spin_lock_irqsave(&gpio->lock, flags);
if (timer_allocation_registered(gpio, offset)) {
rc = unregister_allocated_timer(gpio, offset);
@ -920,7 +920,7 @@ static int enable_debounce(struct gpio_chip *chip, unsigned int offset,
configure_timer(gpio, offset, i);
out:
spin_unlock_irqrestore(&gpio->lock, flags);
raw_spin_unlock_irqrestore(&gpio->lock, flags);
return rc;
}
@ -931,13 +931,13 @@ static int disable_debounce(struct gpio_chip *chip, unsigned int offset)
unsigned long flags;
int rc;
spin_lock_irqsave(&gpio->lock, flags);
raw_spin_lock_irqsave(&gpio->lock, flags);
rc = unregister_allocated_timer(gpio, offset);
if (!rc)
configure_timer(gpio, offset, 0);
spin_unlock_irqrestore(&gpio->lock, flags);
raw_spin_unlock_irqrestore(&gpio->lock, flags);
return rc;
}
@ -1019,7 +1019,7 @@ int aspeed_gpio_copro_grab_gpio(struct gpio_desc *desc,
return -EINVAL;
bindex = offset >> 3;
spin_lock_irqsave(&gpio->lock, flags);
raw_spin_lock_irqsave(&gpio->lock, flags);
/* Sanity check, this shouldn't happen */
if (gpio->cf_copro_bankmap[bindex] == 0xff) {
@ -1040,7 +1040,7 @@ int aspeed_gpio_copro_grab_gpio(struct gpio_desc *desc,
if (bit)
*bit = GPIO_OFFSET(offset);
bail:
spin_unlock_irqrestore(&gpio->lock, flags);
raw_spin_unlock_irqrestore(&gpio->lock, flags);
return rc;
}
EXPORT_SYMBOL_GPL(aspeed_gpio_copro_grab_gpio);
@ -1064,7 +1064,7 @@ int aspeed_gpio_copro_release_gpio(struct gpio_desc *desc)
return -EINVAL;
bindex = offset >> 3;
spin_lock_irqsave(&gpio->lock, flags);
raw_spin_lock_irqsave(&gpio->lock, flags);
/* Sanity check, this shouldn't happen */
if (gpio->cf_copro_bankmap[bindex] == 0) {
@ -1078,7 +1078,7 @@ int aspeed_gpio_copro_release_gpio(struct gpio_desc *desc)
aspeed_gpio_change_cmd_source(gpio, bank, bindex,
GPIO_CMDSRC_ARM);
bail:
spin_unlock_irqrestore(&gpio->lock, flags);
raw_spin_unlock_irqrestore(&gpio->lock, flags);
return rc;
}
EXPORT_SYMBOL_GPL(aspeed_gpio_copro_release_gpio);
@ -1151,7 +1151,7 @@ static int __init aspeed_gpio_probe(struct platform_device *pdev)
if (IS_ERR(gpio->base))
return PTR_ERR(gpio->base);
spin_lock_init(&gpio->lock);
raw_spin_lock_init(&gpio->lock);
gpio_id = of_match_node(aspeed_gpio_of_table, pdev->dev.of_node);
if (!gpio_id)