LinuxLists.cc - [PATCH] gpio: use raw spinlock for gpio chip shadowed data

2022-04-16 00:46:04

Subject: [PATCH] gpio: use raw spinlock for gpio chip shadowed data

In case of PREEMPT_RT, there is a raw_spinlock -> spinlock dependency
as the lockdep report shows.

__irq_set_handler
irq_get_desc_buslock
__irq_get_desc_lock
raw_spin_lock_irqsave(&desc->lock, *flags); // raw spinlock get here
__irq_do_set_handler
mask_ack_irq
dwapb_irq_ack
spin_lock_irqsave(&gc->bgpio_lock, flags); // sleep able spinlock
irq_put_desc_busunlock

Replace with a raw lock to avoid BUGs. This lock is only used to access
registers, and It's safe to replace with the raw lock without bad
influence.

[ 15.090359][ T1] =============================
[ 15.090365][ T1] [ BUG: Invalid wait context ]
[ 15.090373][ T1] 5.10.59-rt52-00983-g186a6841c682-dirty #3 Not tainted
[ 15.090386][ T1] -----------------------------
[ 15.090392][ T1] swapper/0/1 is trying to lock:
[ 15.090402][ T1] 70ff00018507c188 (&gc->bgpio_lock){....}-{3:3}, at: _raw_spin_lock_irqsave+0x1c/0x28
[ 15.090470][ T1] other info that might help us debug this:
[ 15.090477][ T1] context-{5:5}
[ 15.090485][ T1] 3 locks held by swapper/0/1:
[ 15.090497][ T1] #0: c2ff0001816de1a0 (&dev->mutex){....}-{4:4}, at: __device_driver_lock+0x98/0x104
[ 15.090553][ T1] #1: ffff90001485b4b8 (irq_domain_mutex){+.+.}-{4:4}, at: irq_domain_associate+0xbc/0x6d4
[ 15.090606][ T1] #2: 4bff000185d7a8e0 (lock_class){....}-{2:2}, at: _raw_spin_lock_irqsave+0x1c/0x28
[ 15.090654][ T1] stack backtrace:
[ 15.090661][ T1] CPU: 4 PID: 1 Comm: swapper/0 Not tainted 5.10.59-rt52-00983-g186a6841c682-dirty #3
[ 15.090682][ T1] Hardware name: Horizon Robotics Journey 5 DVB (DT)
[ 15.090692][ T1] Call trace:
[ 15.090698][ T1] dump_backtrace+0x0/0x708
[ 15.090717][ T1] show_stack+0x24/0x30
[ 15.090733][ T1] dump_stack+0x1b4/0x2bc
[ 15.090752][ T1] __lock_acquire+0x2800/0xb760
[ 15.090774][ T1] lock_acquire+0x248/0x85c
[ 15.090793][ T1] __raw_spin_lock_irqsave+0xd4/0x270
[ 15.090811][ T1] _raw_spin_lock_irqsave+0x1c/0x28
[ 15.090828][ T1] dwapb_irq_ack+0xb4/0x300
[ 15.090846][ T1] __irq_do_set_handler+0x494/0xb2c
[ 15.090864][ T1] __irq_set_handler+0x74/0x114
[ 15.090881][ T1] irq_set_chip_and_handler_name+0x44/0x58
[ 15.090900][ T1] gpiochip_irq_map+0x210/0x644
[ 15.090917][ T1] irq_domain_associate+0x168/0x6d4
[ 15.090935][ T1] irq_create_mapping_affinity+0x15c/0x354
[ 15.090955][ T1] gpiochip_to_irq+0xb4/0x390
[ 15.090970][ T1] gpiod_to_irq+0xf8/0x1e4
[ 15.090987][ T1] gpio_keys_probe+0x9a0/0x24d0
[ 15.091008][ T1] platform_drv_probe+0x138/0x214
[ 15.091026][ T1] really_probe+0x2e0/0x15d4
[ 15.091045][ T1] driver_probe_device+0x100/0x418
[ 15.091064][ T1] device_driver_attach+0x138/0x234
[ 15.091084][ T1] __driver_attach+0x184/0x358
[ 15.091103][ T1] bus_for_each_dev+0x100/0x1e0
[ 15.091122][ T1] driver_attach+0x5c/0x98
[ 15.091141][ T1] bus_add_driver+0x33c/0x9d8
[ 15.091159][ T1] driver_register+0x1e4/0x6b0
[ 15.091179][ T1] __platform_driver_register+0x118/0x214
[ 15.091196][ T1] gpio_keys_init+0x28/0x34
[ 15.091218][ T1] do_one_initcall+0x8c/0x2d8
[ 15.091236][ T1] do_initcall_level+0x144/0x230
[ 15.091257][ T1] do_initcalls+0xb0/0x170
[ 15.091275][ T1] do_basic_setup+0xd0/0xe4
[ 15.091293][ T1] kernel_init_freeable+0x180/0x3e4
[ 15.091311][ T1] kernel_init+0x2c/0x398
[ 15.091330][ T1] ret_from_fork+0x10/0x30

Signed-off-by: Schspa Shi <[email protected]>
---
drivers/gpio/gpio-amdpt.c | 10 +++----
drivers/gpio/gpio-brcmstb.c | 12 ++++----
drivers/gpio/gpio-cadence.c | 12 ++++----
drivers/gpio/gpio-dwapb.c | 36 +++++++++++------------
drivers/gpio/gpio-grgpio.c | 30 +++++++++----------
drivers/gpio/gpio-hlwd.c | 18 ++++++------
drivers/gpio/gpio-idt3243x.c | 12 ++++----
drivers/gpio/gpio-ixp4xx.c | 4 +--
drivers/gpio/gpio-loongson1.c | 8 ++---
drivers/gpio/gpio-menz127.c | 8 ++---
drivers/gpio/gpio-mlxbf2.c | 18 ++++++------
drivers/gpio/gpio-mmio.c | 22 +++++++-------
drivers/gpio/gpio-sifive.c | 12 ++++----
drivers/gpio/gpio-tb10x.c | 4 +--
drivers/pinctrl/nuvoton/pinctrl-npcm7xx.c | 8 ++---
include/linux/gpio/driver.h | 2 +-
16 files changed, 108 insertions(+), 108 deletions(-)

diff --git a/drivers/gpio/gpio-amdpt.c b/drivers/gpio/gpio-amdpt.c
index 8cfb353c3abb..07c6d090058d 100644
--- a/drivers/gpio/gpio-amdpt.c
+++ b/drivers/gpio/gpio-amdpt.c
@@ -36,19 +36,19 @@ static int pt_gpio_request(struct gpio_chip *gc, unsigned offset)

dev_dbg(gc->parent, "pt_gpio_request offset=%x\n", offset);

- spin_lock_irqsave(&gc->bgpio_lock, flags);
+ raw_spin_lock_irqsave(&gc->bgpio_lock, flags);

using_pins = readl(pt_gpio->reg_base + PT_SYNC_REG);
if (using_pins & BIT(offset)) {
dev_warn(gc->parent, "PT GPIO pin %x reconfigured\n",
offset);
- spin_unlock_irqrestore(&gc->bgpio_lock, flags);
+ raw_spin_unlock_irqrestore(&gc->bgpio_lock, flags);
return -EINVAL;
}

writel(using_pins | BIT(offset), pt_gpio->reg_base + PT_SYNC_REG);

- spin_unlock_irqrestore(&gc->bgpio_lock, flags);
+ raw_spin_unlock_irqrestore(&gc->bgpio_lock, flags);

return 0;
}
@@ -59,13 +59,13 @@ static void pt_gpio_free(struct gpio_chip *gc, unsigned offset)
unsigned long flags;
u32 using_pins;

- spin_lock_irqsave(&gc->bgpio_lock, flags);
+ raw_spin_lock_irqsave(&gc->bgpio_lock, flags);

using_pins = readl(pt_gpio->reg_base + PT_SYNC_REG);
using_pins &= ~BIT(offset);
writel(using_pins, pt_gpio->reg_base + PT_SYNC_REG);

- spin_unlock_irqrestore(&gc->bgpio_lock, flags);
+ raw_spin_unlock_irqrestore(&gc->bgpio_lock, flags);

dev_dbg(gc->parent, "pt_gpio_free offset=%x\n", offset);
}
diff --git a/drivers/gpio/gpio-brcmstb.c b/drivers/gpio/gpio-brcmstb.c
index 74ef89248867..6b7439b44690 100644
--- a/drivers/gpio/gpio-brcmstb.c
+++ b/drivers/gpio/gpio-brcmstb.c
@@ -92,9 +92,9 @@ brcmstb_gpio_get_active_irqs(struct brcmstb_gpio_bank *bank)
unsigned long status;
unsigned long flags;

- spin_lock_irqsave(&bank->gc.bgpio_lock, flags);
+ raw_spin_lock_irqsave(&bank->gc.bgpio_lock, flags);
status = __brcmstb_gpio_get_active_irqs(bank);
- spin_unlock_irqrestore(&bank->gc.bgpio_lock, flags);
+ raw_spin_unlock_irqrestore(&bank->gc.bgpio_lock, flags);

return status;
}
@@ -114,14 +114,14 @@ static void brcmstb_gpio_set_imask(struct brcmstb_gpio_bank *bank,
u32 imask;
unsigned long flags;

- spin_lock_irqsave(&gc->bgpio_lock, flags);
+ raw_spin_lock_irqsave(&gc->bgpio_lock, flags);
imask = gc->read_reg(priv->reg_base + GIO_MASK(bank->id));
if (enable)
imask |= mask;
else
imask &= ~mask;
gc->write_reg(priv->reg_base + GIO_MASK(bank->id), imask);
- spin_unlock_irqrestore(&gc->bgpio_lock, flags);
+ raw_spin_unlock_irqrestore(&gc->bgpio_lock, flags);
}

static int brcmstb_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
@@ -204,7 +204,7 @@ static int brcmstb_gpio_irq_set_type(struct irq_data *d, unsigned int type)
return -EINVAL;
}

- spin_lock_irqsave(&bank->gc.bgpio_lock, flags);
+ raw_spin_lock_irqsave(&bank->gc.bgpio_lock, flags);

iedge_config = bank->gc.read_reg(priv->reg_base +
GIO_EC(bank->id)) & ~mask;
@@ -220,7 +220,7 @@ static int brcmstb_gpio_irq_set_type(struct irq_data *d, unsigned int type)
bank->gc.write_reg(priv->reg_base + GIO_LEVEL(bank->id),
ilevel | level);

- spin_unlock_irqrestore(&bank->gc.bgpio_lock, flags);
+ raw_spin_unlock_irqrestore(&bank->gc.bgpio_lock, flags);
return 0;
}

diff --git a/drivers/gpio/gpio-cadence.c b/drivers/gpio/gpio-cadence.c
index 562f8f7e7d1f..137aea49ba02 100644
--- a/drivers/gpio/gpio-cadence.c
+++ b/drivers/gpio/gpio-cadence.c
@@ -41,12 +41,12 @@ static int cdns_gpio_request(struct gpio_chip *chip, unsigned int offset)
struct cdns_gpio_chip *cgpio = gpiochip_get_data(chip);
unsigned long flags;

- spin_lock_irqsave(&chip->bgpio_lock, flags);
+ raw_spin_lock_irqsave(&chip->bgpio_lock, flags);

iowrite32(ioread32(cgpio->regs + CDNS_GPIO_BYPASS_MODE) & ~BIT(offset),
cgpio->regs + CDNS_GPIO_BYPASS_MODE);

- spin_unlock_irqrestore(&chip->bgpio_lock, flags);
+ raw_spin_unlock_irqrestore(&chip->bgpio_lock, flags);
return 0;
}

@@ -55,13 +55,13 @@ static void cdns_gpio_free(struct gpio_chip *chip, unsigned int offset)
struct cdns_gpio_chip *cgpio = gpiochip_get_data(chip);
unsigned long flags;

- spin_lock_irqsave(&chip->bgpio_lock, flags);
+ raw_spin_lock_irqsave(&chip->bgpio_lock, flags);

iowrite32(ioread32(cgpio->regs + CDNS_GPIO_BYPASS_MODE) |
(BIT(offset) & cgpio->bypass_orig),
cgpio->regs + CDNS_GPIO_BYPASS_MODE);

- spin_unlock_irqrestore(&chip->bgpio_lock, flags);
+ raw_spin_unlock_irqrestore(&chip->bgpio_lock, flags);
}

static void cdns_gpio_irq_mask(struct irq_data *d)
@@ -90,7 +90,7 @@ static int cdns_gpio_irq_set_type(struct irq_data *d, unsigned int type)
u32 mask = BIT(d->hwirq);
int ret = 0;

- spin_lock_irqsave(&chip->bgpio_lock, flags);
+ raw_spin_lock_irqsave(&chip->bgpio_lock, flags);

int_value = ioread32(cgpio->regs + CDNS_GPIO_IRQ_VALUE) & ~mask;
int_type = ioread32(cgpio->regs + CDNS_GPIO_IRQ_TYPE) & ~mask;
@@ -115,7 +115,7 @@ static int cdns_gpio_irq_set_type(struct irq_data *d, unsigned int type)
iowrite32(int_type, cgpio->regs + CDNS_GPIO_IRQ_TYPE);

err_irq_type:
- spin_unlock_irqrestore(&chip->bgpio_lock, flags);
+ raw_spin_unlock_irqrestore(&chip->bgpio_lock, flags);
return ret;
}

diff --git a/drivers/gpio/gpio-dwapb.c b/drivers/gpio/gpio-dwapb.c
index b0f3aca61974..7130195da48d 100644
--- a/drivers/gpio/gpio-dwapb.c
+++ b/drivers/gpio/gpio-dwapb.c
@@ -243,9 +243,9 @@ static void dwapb_irq_ack(struct irq_data *d)
u32 val = BIT(irqd_to_hwirq(d));
unsigned long flags;

- spin_lock_irqsave(&gc->bgpio_lock, flags);
+ raw_spin_lock_irqsave(&gc->bgpio_lock, flags);
dwapb_write(gpio, GPIO_PORTA_EOI, val);
- spin_unlock_irqrestore(&gc->bgpio_lock, flags);
+ raw_spin_unlock_irqrestore(&gc->bgpio_lock, flags);
}

static void dwapb_irq_mask(struct irq_data *d)
@@ -255,10 +255,10 @@ static void dwapb_irq_mask(struct irq_data *d)
unsigned long flags;
u32 val;

- spin_lock_irqsave(&gc->bgpio_lock, flags);
+ raw_spin_lock_irqsave(&gc->bgpio_lock, flags);
val = dwapb_read(gpio, GPIO_INTMASK) | BIT(irqd_to_hwirq(d));
dwapb_write(gpio, GPIO_INTMASK, val);
- spin_unlock_irqrestore(&gc->bgpio_lock, flags);
+ raw_spin_unlock_irqrestore(&gc->bgpio_lock, flags);
}

static void dwapb_irq_unmask(struct irq_data *d)
@@ -268,10 +268,10 @@ static void dwapb_irq_unmask(struct irq_data *d)
unsigned long flags;
u32 val;

- spin_lock_irqsave(&gc->bgpio_lock, flags);
+ raw_spin_lock_irqsave(&gc->bgpio_lock, flags);
val = dwapb_read(gpio, GPIO_INTMASK) & ~BIT(irqd_to_hwirq(d));
dwapb_write(gpio, GPIO_INTMASK, val);
- spin_unlock_irqrestore(&gc->bgpio_lock, flags);
+ raw_spin_unlock_irqrestore(&gc->bgpio_lock, flags);
}

static void dwapb_irq_enable(struct irq_data *d)
@@ -281,11 +281,11 @@ static void dwapb_irq_enable(struct irq_data *d)
unsigned long flags;
u32 val;

- spin_lock_irqsave(&gc->bgpio_lock, flags);
+ raw_spin_lock_irqsave(&gc->bgpio_lock, flags);
val = dwapb_read(gpio, GPIO_INTEN);
val |= BIT(irqd_to_hwirq(d));
dwapb_write(gpio, GPIO_INTEN, val);
- spin_unlock_irqrestore(&gc->bgpio_lock, flags);
+ raw_spin_unlock_irqrestore(&gc->bgpio_lock, flags);
}

static void dwapb_irq_disable(struct irq_data *d)
@@ -295,11 +295,11 @@ static void dwapb_irq_disable(struct irq_data *d)
unsigned long flags;
u32 val;

- spin_lock_irqsave(&gc->bgpio_lock, flags);
+ raw_spin_lock_irqsave(&gc->bgpio_lock, flags);
val = dwapb_read(gpio, GPIO_INTEN);
val &= ~BIT(irqd_to_hwirq(d));
dwapb_write(gpio, GPIO_INTEN, val);
- spin_unlock_irqrestore(&gc->bgpio_lock, flags);
+ raw_spin_unlock_irqrestore(&gc->bgpio_lock, flags);
}

static int dwapb_irq_set_type(struct irq_data *d, u32 type)
@@ -309,7 +309,7 @@ static int dwapb_irq_set_type(struct irq_data *d, u32 type)
irq_hw_number_t bit = irqd_to_hwirq(d);
unsigned long level, polarity, flags;

- spin_lock_irqsave(&gc->bgpio_lock, flags);
+ raw_spin_lock_irqsave(&gc->bgpio_lock, flags);
level = dwapb_read(gpio, GPIO_INTTYPE_LEVEL);
polarity = dwapb_read(gpio, GPIO_INT_POLARITY);

@@ -344,7 +344,7 @@ static int dwapb_irq_set_type(struct irq_data *d, u32 type)
dwapb_write(gpio, GPIO_INTTYPE_LEVEL, level);
if (type != IRQ_TYPE_EDGE_BOTH)
dwapb_write(gpio, GPIO_INT_POLARITY, polarity);
- spin_unlock_irqrestore(&gc->bgpio_lock, flags);
+ raw_spin_unlock_irqrestore(&gc->bgpio_lock, flags);

return 0;
}
@@ -374,7 +374,7 @@ static int dwapb_gpio_set_debounce(struct gpio_chip *gc,
unsigned long flags, val_deb;
unsigned long mask = BIT(offset);

- spin_lock_irqsave(&gc->bgpio_lock, flags);
+ raw_spin_lock_irqsave(&gc->bgpio_lock, flags);

val_deb = dwapb_read(gpio, GPIO_PORTA_DEBOUNCE);
if (debounce)
@@ -383,7 +383,7 @@ static int dwapb_gpio_set_debounce(struct gpio_chip *gc,
val_deb &= ~mask;
dwapb_write(gpio, GPIO_PORTA_DEBOUNCE, val_deb);

- spin_unlock_irqrestore(&gc->bgpio_lock, flags);
+ raw_spin_unlock_irqrestore(&gc->bgpio_lock, flags);

return 0;
}
@@ -738,7 +738,7 @@ static int dwapb_gpio_suspend(struct device *dev)
unsigned long flags;
int i;

- spin_lock_irqsave(&gc->bgpio_lock, flags);
+ raw_spin_lock_irqsave(&gc->bgpio_lock, flags);
for (i = 0; i < gpio->nr_ports; i++) {
unsigned int offset;
unsigned int idx = gpio->ports[i].idx;
@@ -765,7 +765,7 @@ static int dwapb_gpio_suspend(struct device *dev)
dwapb_write(gpio, GPIO_INTMASK, ~ctx->wake_en);
}
}
- spin_unlock_irqrestore(&gc->bgpio_lock, flags);
+ raw_spin_unlock_irqrestore(&gc->bgpio_lock, flags);

clk_bulk_disable_unprepare(DWAPB_NR_CLOCKS, gpio->clks);

@@ -785,7 +785,7 @@ static int dwapb_gpio_resume(struct device *dev)
return err;
}

- spin_lock_irqsave(&gc->bgpio_lock, flags);
+ raw_spin_lock_irqsave(&gc->bgpio_lock, flags);
for (i = 0; i < gpio->nr_ports; i++) {
unsigned int offset;
unsigned int idx = gpio->ports[i].idx;
@@ -812,7 +812,7 @@ static int dwapb_gpio_resume(struct device *dev)
dwapb_write(gpio, GPIO_PORTA_EOI, 0xffffffff);
}
}
- spin_unlock_irqrestore(&gc->bgpio_lock, flags);
+ raw_spin_unlock_irqrestore(&gc->bgpio_lock, flags);

return 0;
}
diff --git a/drivers/gpio/gpio-grgpio.c b/drivers/gpio/gpio-grgpio.c
index 23d447e17a67..df563616f943 100644
--- a/drivers/gpio/gpio-grgpio.c
+++ b/drivers/gpio/gpio-grgpio.c
@@ -145,7 +145,7 @@ static int grgpio_irq_set_type(struct irq_data *d, unsigned int type)
return -EINVAL;
}

- spin_lock_irqsave(&priv->gc.bgpio_lock, flags);
+ raw_spin_lock_irqsave(&priv->gc.bgpio_lock, flags);

ipol = priv->gc.read_reg(priv->regs + GRGPIO_IPOL) & ~mask;
iedge = priv->gc.read_reg(priv->regs + GRGPIO_IEDGE) & ~mask;
@@ -153,7 +153,7 @@ static int grgpio_irq_set_type(struct irq_data *d, unsigned int type)
priv->gc.write_reg(priv->regs + GRGPIO_IPOL, ipol | pol);
priv->gc.write_reg(priv->regs + GRGPIO_IEDGE, iedge | edge);

- spin_unlock_irqrestore(&priv->gc.bgpio_lock, flags);
+ raw_spin_unlock_irqrestore(&priv->gc.bgpio_lock, flags);

return 0;
}
@@ -164,11 +164,11 @@ static void grgpio_irq_mask(struct irq_data *d)
int offset = d->hwirq;
unsigned long flags;

- spin_lock_irqsave(&priv->gc.bgpio_lock, flags);
+ raw_spin_lock_irqsave(&priv->gc.bgpio_lock, flags);

grgpio_set_imask(priv, offset, 0);

- spin_unlock_irqrestore(&priv->gc.bgpio_lock, flags);
+ raw_spin_unlock_irqrestore(&priv->gc.bgpio_lock, flags);
}

static void grgpio_irq_unmask(struct irq_data *d)
@@ -177,11 +177,11 @@ static void grgpio_irq_unmask(struct irq_data *d)
int offset = d->hwirq;
unsigned long flags;

- spin_lock_irqsave(&priv->gc.bgpio_lock, flags);
+ raw_spin_lock_irqsave(&priv->gc.bgpio_lock, flags);

grgpio_set_imask(priv, offset, 1);

- spin_unlock_irqrestore(&priv->gc.bgpio_lock, flags);
+ raw_spin_unlock_irqrestore(&priv->gc.bgpio_lock, flags);
}

static struct irq_chip grgpio_irq_chip = {
@@ -199,7 +199,7 @@ static irqreturn_t grgpio_irq_handler(int irq, void *dev)
int i;
int match = 0;

- spin_lock_irqsave(&priv->gc.bgpio_lock, flags);
+ raw_spin_lock_irqsave(&priv->gc.bgpio_lock, flags);

/*
* For each gpio line, call its interrupt handler if it its underlying
@@ -215,7 +215,7 @@ static irqreturn_t grgpio_irq_handler(int irq, void *dev)
}
}

- spin_unlock_irqrestore(&priv->gc.bgpio_lock, flags);
+ raw_spin_unlock_irqrestore(&priv->gc.bgpio_lock, flags);

if (!match)
dev_warn(priv->dev, "No gpio line matched irq %d\n", irq);
@@ -247,13 +247,13 @@ static int grgpio_irq_map(struct irq_domain *d, unsigned int irq,
dev_dbg(priv->dev, "Mapping irq %d for gpio line %d\n",
irq, offset);

- spin_lock_irqsave(&priv->gc.bgpio_lock, flags);
+ raw_spin_lock_irqsave(&priv->gc.bgpio_lock, flags);

/* Request underlying irq if not already requested */
lirq->irq = irq;
uirq = &priv->uirqs[lirq->index];
if (uirq->refcnt == 0) {
- spin_unlock_irqrestore(&priv->gc.bgpio_lock, flags);
+ raw_spin_unlock_irqrestore(&priv->gc.bgpio_lock, flags);
ret = request_irq(uirq->uirq, grgpio_irq_handler, 0,
dev_name(priv->dev), priv);
if (ret) {
@@ -262,11 +262,11 @@ static int grgpio_irq_map(struct irq_domain *d, unsigned int irq,
uirq->uirq);
return ret;
}
- spin_lock_irqsave(&priv->gc.bgpio_lock, flags);
+ raw_spin_lock_irqsave(&priv->gc.bgpio_lock, flags);
}
uirq->refcnt++;

- spin_unlock_irqrestore(&priv->gc.bgpio_lock, flags);
+ raw_spin_unlock_irqrestore(&priv->gc.bgpio_lock, flags);

/* Setup irq */
irq_set_chip_data(irq, priv);
@@ -290,7 +290,7 @@ static void grgpio_irq_unmap(struct irq_domain *d, unsigned int irq)
irq_set_chip_and_handler(irq, NULL, NULL);
irq_set_chip_data(irq, NULL);

- spin_lock_irqsave(&priv->gc.bgpio_lock, flags);
+ raw_spin_lock_irqsave(&priv->gc.bgpio_lock, flags);

/* Free underlying irq if last user unmapped */
index = -1;
@@ -309,13 +309,13 @@ static void grgpio_irq_unmap(struct irq_domain *d, unsigned int irq)
uirq = &priv->uirqs[lirq->index];
uirq->refcnt--;
if (uirq->refcnt == 0) {
- spin_unlock_irqrestore(&priv->gc.bgpio_lock, flags);
+ raw_spin_unlock_irqrestore(&priv->gc.bgpio_lock, flags);
free_irq(uirq->uirq, priv);
return;
}
}

- spin_unlock_irqrestore(&priv->gc.bgpio_lock, flags);
+ raw_spin_unlock_irqrestore(&priv->gc.bgpio_lock, flags);
}

static const struct irq_domain_ops grgpio_irq_domain_ops = {
diff --git a/drivers/gpio/gpio-hlwd.c b/drivers/gpio/gpio-hlwd.c
index 641719a96a1a..4e13e937f832 100644
--- a/drivers/gpio/gpio-hlwd.c
+++ b/drivers/gpio/gpio-hlwd.c
@@ -65,7 +65,7 @@ static void hlwd_gpio_irqhandler(struct irq_desc *desc)
int hwirq;
u32 emulated_pending;

- spin_lock_irqsave(&hlwd->gpioc.bgpio_lock, flags);
+ raw_spin_lock_irqsave(&hlwd->gpioc.bgpio_lock, flags);
pending = ioread32be(hlwd->regs + HW_GPIOB_INTFLAG);
pending &= ioread32be(hlwd->regs + HW_GPIOB_INTMASK);

@@ -93,7 +93,7 @@ static void hlwd_gpio_irqhandler(struct irq_desc *desc)
/* Mark emulated interrupts as pending */
pending |= rising | falling;
}
- spin_unlock_irqrestore(&hlwd->gpioc.bgpio_lock, flags);
+ raw_spin_unlock_irqrestore(&hlwd->gpioc.bgpio_lock, flags);

chained_irq_enter(chip, desc);

@@ -118,11 +118,11 @@ static void hlwd_gpio_irq_mask(struct irq_data *data)
unsigned long flags;
u32 mask;

- spin_lock_irqsave(&hlwd->gpioc.bgpio_lock, flags);
+ raw_spin_lock_irqsave(&hlwd->gpioc.bgpio_lock, flags);
mask = ioread32be(hlwd->regs + HW_GPIOB_INTMASK);
mask &= ~BIT(data->hwirq);
iowrite32be(mask, hlwd->regs + HW_GPIOB_INTMASK);
- spin_unlock_irqrestore(&hlwd->gpioc.bgpio_lock, flags);
+ raw_spin_unlock_irqrestore(&hlwd->gpioc.bgpio_lock, flags);
}

static void hlwd_gpio_irq_unmask(struct irq_data *data)
@@ -132,11 +132,11 @@ static void hlwd_gpio_irq_unmask(struct irq_data *data)
unsigned long flags;
u32 mask;

- spin_lock_irqsave(&hlwd->gpioc.bgpio_lock, flags);
+ raw_spin_lock_irqsave(&hlwd->gpioc.bgpio_lock, flags);
mask = ioread32be(hlwd->regs + HW_GPIOB_INTMASK);
mask |= BIT(data->hwirq);
iowrite32be(mask, hlwd->regs + HW_GPIOB_INTMASK);
- spin_unlock_irqrestore(&hlwd->gpioc.bgpio_lock, flags);
+ raw_spin_unlock_irqrestore(&hlwd->gpioc.bgpio_lock, flags);
}

static void hlwd_gpio_irq_enable(struct irq_data *data)
@@ -173,7 +173,7 @@ static int hlwd_gpio_irq_set_type(struct irq_data *data, unsigned int flow_type)
unsigned long flags;
u32 level;

- spin_lock_irqsave(&hlwd->gpioc.bgpio_lock, flags);
+ raw_spin_lock_irqsave(&hlwd->gpioc.bgpio_lock, flags);

hlwd->edge_emulation &= ~BIT(data->hwirq);

@@ -194,11 +194,11 @@ static int hlwd_gpio_irq_set_type(struct irq_data *data, unsigned int flow_type)
hlwd_gpio_irq_setup_emulation(hlwd, data->hwirq, flow_type);
break;
default:
- spin_unlock_irqrestore(&hlwd->gpioc.bgpio_lock, flags);
+ raw_spin_unlock_irqrestore(&hlwd->gpioc.bgpio_lock, flags);
return -EINVAL;
}

- spin_unlock_irqrestore(&hlwd->gpioc.bgpio_lock, flags);
+ raw_spin_unlock_irqrestore(&hlwd->gpioc.bgpio_lock, flags);
return 0;
}

diff --git a/drivers/gpio/gpio-idt3243x.c b/drivers/gpio/gpio-idt3243x.c
index 52b8b72ded77..1cafdf46f875 100644
--- a/drivers/gpio/gpio-idt3243x.c
+++ b/drivers/gpio/gpio-idt3243x.c
@@ -57,7 +57,7 @@ static int idt_gpio_irq_set_type(struct irq_data *d, unsigned int flow_type)
if (sense == IRQ_TYPE_NONE || (sense & IRQ_TYPE_EDGE_BOTH))
return -EINVAL;

- spin_lock_irqsave(&gc->bgpio_lock, flags);
+ raw_spin_lock_irqsave(&gc->bgpio_lock, flags);

ilevel = readl(ctrl->gpio + IDT_GPIO_ILEVEL);
if (sense & IRQ_TYPE_LEVEL_HIGH)
@@ -68,7 +68,7 @@ static int idt_gpio_irq_set_type(struct irq_data *d, unsigned int flow_type)
writel(ilevel, ctrl->gpio + IDT_GPIO_ILEVEL);
irq_set_handler_locked(d, handle_level_irq);

- spin_unlock_irqrestore(&gc->bgpio_lock, flags);
+ raw_spin_unlock_irqrestore(&gc->bgpio_lock, flags);
return 0;
}

@@ -86,12 +86,12 @@ static void idt_gpio_mask(struct irq_data *d)
struct idt_gpio_ctrl *ctrl = gpiochip_get_data(gc);
unsigned long flags;

- spin_lock_irqsave(&gc->bgpio_lock, flags);
+ raw_spin_lock_irqsave(&gc->bgpio_lock, flags);

ctrl->mask_cache |= BIT(d->hwirq);
writel(ctrl->mask_cache, ctrl->pic + IDT_PIC_IRQ_MASK);

- spin_unlock_irqrestore(&gc->bgpio_lock, flags);
+ raw_spin_unlock_irqrestore(&gc->bgpio_lock, flags);
}

static void idt_gpio_unmask(struct irq_data *d)
@@ -100,12 +100,12 @@ static void idt_gpio_unmask(struct irq_data *d)
struct idt_gpio_ctrl *ctrl = gpiochip_get_data(gc);
unsigned long flags;

- spin_lock_irqsave(&gc->bgpio_lock, flags);
+ raw_spin_lock_irqsave(&gc->bgpio_lock, flags);

ctrl->mask_cache &= ~BIT(d->hwirq);
writel(ctrl->mask_cache, ctrl->pic + IDT_PIC_IRQ_MASK);

- spin_unlock_irqrestore(&gc->bgpio_lock, flags);
+ raw_spin_unlock_irqrestore(&gc->bgpio_lock, flags);
}

static int idt_gpio_irq_init_hw(struct gpio_chip *gc)
diff --git a/drivers/gpio/gpio-ixp4xx.c b/drivers/gpio/gpio-ixp4xx.c
index b3b050604e0b..6b184502fa3f 100644
--- a/drivers/gpio/gpio-ixp4xx.c
+++ b/drivers/gpio/gpio-ixp4xx.c
@@ -128,7 +128,7 @@ static int ixp4xx_gpio_irq_set_type(struct irq_data *d, unsigned int type)
int_reg = IXP4XX_REG_GPIT1;
}

- spin_lock_irqsave(&g->gc.bgpio_lock, flags);
+ raw_spin_lock_irqsave(&g->gc.bgpio_lock, flags);

/* Clear the style for the appropriate pin */
val = __raw_readl(g->base + int_reg);
@@ -147,7 +147,7 @@ static int ixp4xx_gpio_irq_set_type(struct irq_data *d, unsigned int type)
val |= BIT(d->hwirq);
__raw_writel(val, g->base + IXP4XX_REG_GPOE);

- spin_unlock_irqrestore(&g->gc.bgpio_lock, flags);
+ raw_spin_unlock_irqrestore(&g->gc.bgpio_lock, flags);

/* This parent only accept level high (asserted) */
return irq_chip_set_type_parent(d, IRQ_TYPE_LEVEL_HIGH);
diff --git a/drivers/gpio/gpio-loongson1.c b/drivers/gpio/gpio-loongson1.c
index 1b1ee94eeab4..5d90b3bc5a25 100644
--- a/drivers/gpio/gpio-loongson1.c
+++ b/drivers/gpio/gpio-loongson1.c
@@ -25,10 +25,10 @@ static int ls1x_gpio_request(struct gpio_chip *gc, unsigned int offset)
{
unsigned long flags;

- spin_lock_irqsave(&gc->bgpio_lock, flags);
+ raw_spin_lock_irqsave(&gc->bgpio_lock, flags);
__raw_writel(__raw_readl(gpio_reg_base + GPIO_CFG) | BIT(offset),
gpio_reg_base + GPIO_CFG);
- spin_unlock_irqrestore(&gc->bgpio_lock, flags);
+ raw_spin_unlock_irqrestore(&gc->bgpio_lock, flags);

return 0;
}
@@ -37,10 +37,10 @@ static void ls1x_gpio_free(struct gpio_chip *gc, unsigned int offset)
{
unsigned long flags;

- spin_lock_irqsave(&gc->bgpio_lock, flags);
+ raw_spin_lock_irqsave(&gc->bgpio_lock, flags);
__raw_writel(__raw_readl(gpio_reg_base + GPIO_CFG) & ~BIT(offset),
gpio_reg_base + GPIO_CFG);
- spin_unlock_irqrestore(&gc->bgpio_lock, flags);
+ raw_spin_unlock_irqrestore(&gc->bgpio_lock, flags);
}

static int ls1x_gpio_probe(struct platform_device *pdev)
diff --git a/drivers/gpio/gpio-menz127.c b/drivers/gpio/gpio-menz127.c
index 1e21c661d79d..a035a9bcb57c 100644
--- a/drivers/gpio/gpio-menz127.c
+++ b/drivers/gpio/gpio-menz127.c
@@ -64,7 +64,7 @@ static int men_z127_debounce(struct gpio_chip *gc, unsigned gpio,
debounce /= 50;
}

- spin_lock(&gc->bgpio_lock);
+ raw_spin_lock(&gc->bgpio_lock);

db_en = readl(priv->reg_base + MEN_Z127_DBER);

@@ -79,7 +79,7 @@ static int men_z127_debounce(struct gpio_chip *gc, unsigned gpio,
writel(db_en, priv->reg_base + MEN_Z127_DBER);
writel(db_cnt, priv->reg_base + GPIO_TO_DBCNT_REG(gpio));

- spin_unlock(&gc->bgpio_lock);
+ raw_spin_unlock(&gc->bgpio_lock);

return 0;
}
@@ -91,7 +91,7 @@ static int men_z127_set_single_ended(struct gpio_chip *gc,
struct men_z127_gpio *priv = gpiochip_get_data(gc);
u32 od_en;

- spin_lock(&gc->bgpio_lock);
+ raw_spin_lock(&gc->bgpio_lock);
od_en = readl(priv->reg_base + MEN_Z127_ODER);

if (param == PIN_CONFIG_DRIVE_OPEN_DRAIN)
@@ -101,7 +101,7 @@ static int men_z127_set_single_ended(struct gpio_chip *gc,
od_en &= ~BIT(offset);

writel(od_en, priv->reg_base + MEN_Z127_ODER);
- spin_unlock(&gc->bgpio_lock);
+ raw_spin_unlock(&gc->bgpio_lock);

return 0;
}
diff --git a/drivers/gpio/gpio-mlxbf2.c b/drivers/gpio/gpio-mlxbf2.c
index 3d89912a05b8..64cb060d9d75 100644
--- a/drivers/gpio/gpio-mlxbf2.c
+++ b/drivers/gpio/gpio-mlxbf2.c
@@ -131,7 +131,7 @@ static int mlxbf2_gpio_lock_acquire(struct mlxbf2_gpio_context *gs)
u32 arm_gpio_lock_val;

mutex_lock(yu_arm_gpio_lock_param.lock);
- spin_lock(&gs->gc.bgpio_lock);
+ raw_spin_lock(&gs->gc.bgpio_lock);

arm_gpio_lock_val = readl(yu_arm_gpio_lock_param.io);

@@ -139,7 +139,7 @@ static int mlxbf2_gpio_lock_acquire(struct mlxbf2_gpio_context *gs)
* When lock active bit[31] is set, ModeX is write enabled
*/
if (YU_LOCK_ACTIVE_BIT(arm_gpio_lock_val)) {
- spin_unlock(&gs->gc.bgpio_lock);
+ raw_spin_unlock(&gs->gc.bgpio_lock);
mutex_unlock(yu_arm_gpio_lock_param.lock);
return -EINVAL;
}
@@ -157,7 +157,7 @@ static void mlxbf2_gpio_lock_release(struct mlxbf2_gpio_context *gs)
__releases(yu_arm_gpio_lock_param.lock)
{
writel(YU_ARM_GPIO_LOCK_RELEASE, yu_arm_gpio_lock_param.io);
- spin_unlock(&gs->gc.bgpio_lock);
+ raw_spin_unlock(&gs->gc.bgpio_lock);
mutex_unlock(yu_arm_gpio_lock_param.lock);
}

@@ -237,7 +237,7 @@ static void mlxbf2_gpio_irq_enable(struct irq_data *irqd)
unsigned long flags;
u32 val;

- spin_lock_irqsave(&gs->gc.bgpio_lock, flags);
+ raw_spin_lock_irqsave(&gs->gc.bgpio_lock, flags);
val = readl(gs->gpio_io + YU_GPIO_CAUSE_OR_CLRCAUSE);
val |= BIT(offset);
writel(val, gs->gpio_io + YU_GPIO_CAUSE_OR_CLRCAUSE);
@@ -245,7 +245,7 @@ static void mlxbf2_gpio_irq_enable(struct irq_data *irqd)
val = readl(gs->gpio_io + YU_GPIO_CAUSE_OR_EVTEN0);
val |= BIT(offset);
writel(val, gs->gpio_io + YU_GPIO_CAUSE_OR_EVTEN0);
- spin_unlock_irqrestore(&gs->gc.bgpio_lock, flags);
+ raw_spin_unlock_irqrestore(&gs->gc.bgpio_lock, flags);
}

static void mlxbf2_gpio_irq_disable(struct irq_data *irqd)
@@ -256,11 +256,11 @@ static void mlxbf2_gpio_irq_disable(struct irq_data *irqd)
unsigned long flags;
u32 val;

- spin_lock_irqsave(&gs->gc.bgpio_lock, flags);
+ raw_spin_lock_irqsave(&gs->gc.bgpio_lock, flags);
val = readl(gs->gpio_io + YU_GPIO_CAUSE_OR_EVTEN0);
val &= ~BIT(offset);
writel(val, gs->gpio_io + YU_GPIO_CAUSE_OR_EVTEN0);
- spin_unlock_irqrestore(&gs->gc.bgpio_lock, flags);
+ raw_spin_unlock_irqrestore(&gs->gc.bgpio_lock, flags);
}

static irqreturn_t mlxbf2_gpio_irq_handler(int irq, void *ptr)
@@ -307,7 +307,7 @@ mlxbf2_gpio_irq_set_type(struct irq_data *irqd, unsigned int type)
return -EINVAL;
}

- spin_lock_irqsave(&gs->gc.bgpio_lock, flags);
+ raw_spin_lock_irqsave(&gs->gc.bgpio_lock, flags);
if (fall) {
val = readl(gs->gpio_io + YU_GPIO_CAUSE_FALL_EN);
val |= BIT(offset);
@@ -319,7 +319,7 @@ mlxbf2_gpio_irq_set_type(struct irq_data *irqd, unsigned int type)
val |= BIT(offset);
writel(val, gs->gpio_io + YU_GPIO_CAUSE_RISE_EN);
}
- spin_unlock_irqrestore(&gs->gc.bgpio_lock, flags);
+ raw_spin_unlock_irqrestore(&gs->gc.bgpio_lock, flags);

return 0;
}
diff --git a/drivers/gpio/gpio-mmio.c b/drivers/gpio/gpio-mmio.c
index c335a0309ba3..d9dff3dc92ae 100644
--- a/drivers/gpio/gpio-mmio.c
+++ b/drivers/gpio/gpio-mmio.c
@@ -220,7 +220,7 @@ static void bgpio_set(struct gpio_chip *gc, unsigned int gpio, int val)
unsigned long mask = bgpio_line2mask(gc, gpio);
unsigned long flags;

- spin_lock_irqsave(&gc->bgpio_lock, flags);
+ raw_spin_lock_irqsave(&gc->bgpio_lock, flags);

if (val)
gc->bgpio_data |= mask;
@@ -229,7 +229,7 @@ static void bgpio_set(struct gpio_chip *gc, unsigned int gpio, int val)

gc->write_reg(gc->reg_dat, gc->bgpio_data);

- spin_unlock_irqrestore(&gc->bgpio_lock, flags);
+ raw_spin_unlock_irqrestore(&gc->bgpio_lock, flags);
}

static void bgpio_set_with_clear(struct gpio_chip *gc, unsigned int gpio,
@@ -248,7 +248,7 @@ static void bgpio_set_set(struct gpio_chip *gc, unsigned int gpio, int val)
unsigned long mask = bgpio_line2mask(gc, gpio);
unsigned long flags;

- spin_lock_irqsave(&gc->bgpio_lock, flags);
+ raw_spin_lock_irqsave(&gc->bgpio_lock, flags);

if (val)
gc->bgpio_data |= mask;
@@ -257,7 +257,7 @@ static void bgpio_set_set(struct gpio_chip *gc, unsigned int gpio, int val)

gc->write_reg(gc->reg_set, gc->bgpio_data);

- spin_unlock_irqrestore(&gc->bgpio_lock, flags);
+ raw_spin_unlock_irqrestore(&gc->bgpio_lock, flags);
}

static void bgpio_multiple_get_masks(struct gpio_chip *gc,
@@ -286,7 +286,7 @@ static void bgpio_set_multiple_single_reg(struct gpio_chip *gc,
unsigned long flags;
unsigned long set_mask, clear_mask;

- spin_lock_irqsave(&gc->bgpio_lock, flags);
+ raw_spin_lock_irqsave(&gc->bgpio_lock, flags);

bgpio_multiple_get_masks(gc, mask, bits, &set_mask, &clear_mask);

@@ -295,7 +295,7 @@ static void bgpio_set_multiple_single_reg(struct gpio_chip *gc,

gc->write_reg(reg, gc->bgpio_data);

- spin_unlock_irqrestore(&gc->bgpio_lock, flags);
+ raw_spin_unlock_irqrestore(&gc->bgpio_lock, flags);
}

static void bgpio_set_multiple(struct gpio_chip *gc, unsigned long *mask,
@@ -347,7 +347,7 @@ static int bgpio_dir_in(struct gpio_chip *gc, unsigned int gpio)
{
unsigned long flags;

- spin_lock_irqsave(&gc->bgpio_lock, flags);
+ raw_spin_lock_irqsave(&gc->bgpio_lock, flags);

gc->bgpio_dir &= ~bgpio_line2mask(gc, gpio);

@@ -356,7 +356,7 @@ static int bgpio_dir_in(struct gpio_chip *gc, unsigned int gpio)
if (gc->reg_dir_out)
gc->write_reg(gc->reg_dir_out, gc->bgpio_dir);

- spin_unlock_irqrestore(&gc->bgpio_lock, flags);
+ raw_spin_unlock_irqrestore(&gc->bgpio_lock, flags);

return 0;
}
@@ -387,7 +387,7 @@ static void bgpio_dir_out(struct gpio_chip *gc, unsigned int gpio, int val)
{
unsigned long flags;

- spin_lock_irqsave(&gc->bgpio_lock, flags);
+ raw_spin_lock_irqsave(&gc->bgpio_lock, flags);

gc->bgpio_dir |= bgpio_line2mask(gc, gpio);

@@ -396,7 +396,7 @@ static void bgpio_dir_out(struct gpio_chip *gc, unsigned int gpio, int val)
if (gc->reg_dir_out)
gc->write_reg(gc->reg_dir_out, gc->bgpio_dir);

- spin_unlock_irqrestore(&gc->bgpio_lock, flags);
+ raw_spin_unlock_irqrestore(&gc->bgpio_lock, flags);
}

static int bgpio_dir_out_dir_first(struct gpio_chip *gc, unsigned int gpio,
@@ -610,7 +610,7 @@ int bgpio_init(struct gpio_chip *gc, struct device *dev,
if (gc->bgpio_bits > BITS_PER_LONG)
return -EINVAL;

- spin_lock_init(&gc->bgpio_lock);
+ raw_spin_lock_init(&gc->bgpio_lock);
gc->parent = dev;
gc->label = dev_name(dev);
gc->base = -1;
diff --git a/drivers/gpio/gpio-sifive.c b/drivers/gpio/gpio-sifive.c
index 7d82388b4ab7..03b8c4de2e91 100644
--- a/drivers/gpio/gpio-sifive.c
+++ b/drivers/gpio/gpio-sifive.c
@@ -44,7 +44,7 @@ static void sifive_gpio_set_ie(struct sifive_gpio *chip, unsigned int offset)
unsigned long flags;
unsigned int trigger;

- spin_lock_irqsave(&chip->gc.bgpio_lock, flags);
+ raw_spin_lock_irqsave(&chip->gc.bgpio_lock, flags);
trigger = (chip->irq_state & BIT(offset)) ? chip->trigger[offset] : 0;
regmap_update_bits(chip->regs, SIFIVE_GPIO_RISE_IE, BIT(offset),
(trigger & IRQ_TYPE_EDGE_RISING) ? BIT(offset) : 0);
@@ -54,7 +54,7 @@ static void sifive_gpio_set_ie(struct sifive_gpio *chip, unsigned int offset)
(trigger & IRQ_TYPE_LEVEL_HIGH) ? BIT(offset) : 0);
regmap_update_bits(chip->regs, SIFIVE_GPIO_LOW_IE, BIT(offset),
(trigger & IRQ_TYPE_LEVEL_LOW) ? BIT(offset) : 0);
- spin_unlock_irqrestore(&chip->gc.bgpio_lock, flags);
+ raw_spin_unlock_irqrestore(&chip->gc.bgpio_lock, flags);
}

static int sifive_gpio_irq_set_type(struct irq_data *d, unsigned int trigger)
@@ -84,13 +84,13 @@ static void sifive_gpio_irq_enable(struct irq_data *d)
/* Switch to input */
gc->direction_input(gc, offset);

- spin_lock_irqsave(&gc->bgpio_lock, flags);
+ raw_spin_lock_irqsave(&gc->bgpio_lock, flags);
/* Clear any sticky pending interrupts */
regmap_write(chip->regs, SIFIVE_GPIO_RISE_IP, bit);
regmap_write(chip->regs, SIFIVE_GPIO_FALL_IP, bit);
regmap_write(chip->regs, SIFIVE_GPIO_HIGH_IP, bit);
regmap_write(chip->regs, SIFIVE_GPIO_LOW_IP, bit);
- spin_unlock_irqrestore(&gc->bgpio_lock, flags);
+ raw_spin_unlock_irqrestore(&gc->bgpio_lock, flags);

/* Enable interrupts */
assign_bit(offset, &chip->irq_state, 1);
@@ -116,13 +116,13 @@ static void sifive_gpio_irq_eoi(struct irq_data *d)
u32 bit = BIT(offset);
unsigned long flags;

- spin_lock_irqsave(&gc->bgpio_lock, flags);
+ raw_spin_lock_irqsave(&gc->bgpio_lock, flags);
/* Clear all pending interrupts */
regmap_write(chip->regs, SIFIVE_GPIO_RISE_IP, bit);
regmap_write(chip->regs, SIFIVE_GPIO_FALL_IP, bit);
regmap_write(chip->regs, SIFIVE_GPIO_HIGH_IP, bit);
regmap_write(chip->regs, SIFIVE_GPIO_LOW_IP, bit);
- spin_unlock_irqrestore(&gc->bgpio_lock, flags);
+ raw_spin_unlock_irqrestore(&gc->bgpio_lock, flags);

irq_chip_eoi_parent(d);
}
diff --git a/drivers/gpio/gpio-tb10x.c b/drivers/gpio/gpio-tb10x.c
index 718a508d3b2f..de6afa3f9716 100644
--- a/drivers/gpio/gpio-tb10x.c
+++ b/drivers/gpio/gpio-tb10x.c
@@ -62,14 +62,14 @@ static inline void tb10x_set_bits(struct tb10x_gpio *gpio, unsigned int offs,
u32 r;
unsigned long flags;

- spin_lock_irqsave(&gpio->gc.bgpio_lock, flags);
+ raw_spin_lock_irqsave(&gpio->gc.bgpio_lock, flags);

r = tb10x_reg_read(gpio, offs);
r = (r & ~mask) | (val & mask);

tb10x_reg_write(gpio, offs, r);

- spin_unlock_irqrestore(&gpio->gc.bgpio_lock, flags);
+ raw_spin_unlock_irqrestore(&gpio->gc.bgpio_lock, flags);
}

static int tb10x_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
diff --git a/drivers/pinctrl/nuvoton/pinctrl-npcm7xx.c b/drivers/pinctrl/nuvoton/pinctrl-npcm7xx.c
index 9557fac5d11c..b2a0f11a658b 100644
--- a/drivers/pinctrl/nuvoton/pinctrl-npcm7xx.c
+++ b/drivers/pinctrl/nuvoton/pinctrl-npcm7xx.c
@@ -104,12 +104,12 @@ static void npcm_gpio_set(struct gpio_chip *gc, void __iomem *reg,
unsigned long flags;
unsigned long val;

- spin_lock_irqsave(&gc->bgpio_lock, flags);
+ raw_spin_lock_irqsave(&gc->bgpio_lock, flags);

val = ioread32(reg) | pinmask;
iowrite32(val, reg);

- spin_unlock_irqrestore(&gc->bgpio_lock, flags);
+ raw_spin_unlock_irqrestore(&gc->bgpio_lock, flags);
}

static void npcm_gpio_clr(struct gpio_chip *gc, void __iomem *reg,
@@ -118,12 +118,12 @@ static void npcm_gpio_clr(struct gpio_chip *gc, void __iomem *reg,
unsigned long flags;
unsigned long val;

- spin_lock_irqsave(&gc->bgpio_lock, flags);
+ raw_spin_lock_irqsave(&gc->bgpio_lock, flags);

val = ioread32(reg) & ~pinmask;
iowrite32(val, reg);

- spin_unlock_irqrestore(&gc->bgpio_lock, flags);
+ raw_spin_unlock_irqrestore(&gc->bgpio_lock, flags);
}

static void npcmgpio_dbg_show(struct seq_file *s, struct gpio_chip *chip)
diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h
index 874aabd270c9..ff8247a19f57 100644
--- a/include/linux/gpio/driver.h
+++ b/include/linux/gpio/driver.h
@@ -445,7 +445,7 @@ struct gpio_chip {
void __iomem *reg_dir_in;
bool bgpio_dir_unreadable;
int bgpio_bits;
- spinlock_t bgpio_lock;
+ raw_spinlock_t bgpio_lock;
unsigned long bgpio_data;
unsigned long bgpio_dir;
#endif /* CONFIG_GPIO_GENERIC */
--
2.24.3 (Apple Git-128)

2022-04-16 09:22:05

by Andy Shevchenko

[permalink] [raw]

Subject: Re: [PATCH] gpio: use raw spinlock for gpio chip shadowed data

On Sat, Apr 16, 2022 at 3:45 AM Schspa Shi <[email protected]> wrote:
>
> In case of PREEMPT_RT, there is a raw_spinlock -> spinlock dependency
> as the lockdep report shows.
>
> __irq_set_handler
> irq_get_desc_buslock
> __irq_get_desc_lock
> raw_spin_lock_irqsave(&desc->lock, *flags); // raw spinlock get here
> __irq_do_set_handler
> mask_ack_irq
> dwapb_irq_ack
> spin_lock_irqsave(&gc->bgpio_lock, flags); // sleep able spinlock
> irq_put_desc_busunlock
>
> Replace with a raw lock to avoid BUGs. This lock is only used to access
> registers, and It's safe to replace with the raw lock without bad
> influence.

> [ 15.090359][ T1] =============================
> [ 15.090365][ T1] [ BUG: Invalid wait context ]
> [ 15.090373][ T1] 5.10.59-rt52-00983-g186a6841c682-dirty #3 Not tainted
> [ 15.090386][ T1] -----------------------------

Please, reduce this very noise traceback to the point, usually it
takes ~3-5 lines only.

...

> drivers/gpio/gpio-amdpt.c | 10 +++----
> drivers/gpio/gpio-brcmstb.c | 12 ++++----
> drivers/gpio/gpio-cadence.c | 12 ++++----
> drivers/gpio/gpio-dwapb.c | 36 +++++++++++------------
> drivers/gpio/gpio-grgpio.c | 30 +++++++++----------
> drivers/gpio/gpio-hlwd.c | 18 ++++++------
> drivers/gpio/gpio-idt3243x.c | 12 ++++----
> drivers/gpio/gpio-ixp4xx.c | 4 +--
> drivers/gpio/gpio-loongson1.c | 8 ++---
> drivers/gpio/gpio-menz127.c | 8 ++---
> drivers/gpio/gpio-mlxbf2.c | 18 ++++++------
> drivers/gpio/gpio-mmio.c | 22 +++++++-------
> drivers/gpio/gpio-sifive.c | 12 ++++----
> drivers/gpio/gpio-tb10x.c | 4 +--
> drivers/pinctrl/nuvoton/pinctrl-npcm7xx.c | 8 ++---
> include/linux/gpio/driver.h | 2 +-

Looking into the code I think we can't easily (without too much
additional churn) to split this to the series of patches. But I leave
this up to the maintainers to decide.

--
With Best Regards,
Andy Shevchenko

2022-04-18 09:51:23

by Schspa Shi

[permalink] [raw]

Subject: Re: [PATCH] gpio: use raw spinlock for gpio chip shadowed data

Andy Shevchenko <[email protected]> writes:

>
> Changelog:
> v1 -> v2:
> - Reduce the useless stacktrace.
> - Split to series of patches
>
> Changelog usually goes after cutter ‘--- ‘ line. Besides that you haven’t compiled your tree just after this patch.
>

Yes, thanks for reminding me, I will fix it by upload another version
of patch if there is no other problems.

> Link: https://lore.kernel.org/all/[email protected]/
>
> Signed-off-by: Schspa Shi <[email protected]>
> ---
> drivers/gpio/gpio-mmio.c | 22 +++++++++++-----------
> include/linux/gpio/driver.h | 2 +-
>
> You can’t do it for one driver only. As I told it will require too much of additional churn to make this to be series.
>

It seems I have misunderstood your "too much of additional churn". Can
you explain it?
The gpio-mmio.c and driver.h here are the basics of other gpio
drivers. In my opinion, these two files
belong to the basic code of gpio, and functions such as bgpio_init are
declared in
include/linux/gpio/driver.h and implemented in
drivers/gpio/gpio-mmio.c. So there is no churn.

--
Schspa Shi
BRs

2022-04-18 11:28:53

by Schspa Shi

[permalink] [raw]

On Tue, Apr 19, 2022 at 3:28 AM Schspa Shi <[email protected]> wrote:

> In case of PREEMPT_RT, there is a raw_spinlock -> spinlock dependency
> as the lockdep report shows.
>
> __irq_set_handler
> irq_get_desc_buslock
> __irq_get_desc_lock
> raw_spin_lock_irqsave(&desc->lock, *flags); // raw spinlock get here
> __irq_do_set_handler
> mask_ack_irq
> dwapb_irq_ack
> spin_lock_irqsave(&gc->bgpio_lock, flags); // sleep able spinlock
> irq_put_desc_busunlock
>
> Replace with a raw lock to avoid BUGs. This lock is only used to access
> registers, and It's safe to replace with the raw lock without bad
> influence.
>
> [ 15.090359][ T1] =============================
> [ 15.090365][ T1] [ BUG: Invalid wait context ]
> [ 15.090373][ T1] 5.10.59-rt52-00983-g186a6841c682-dirty #3 Not tainted
> [ 15.090386][ T1] -----------------------------
> [ 15.090392][ T1] swapper/0/1 is trying to lock:
> [ 15.090402][ T1] 70ff00018507c188 (&gc->bgpio_lock){....}-{3:3}, at: _raw_spin_lock_irqsave+0x1c/0x28
> [ 15.090470][ T1] other info that might help us debug this:
> [ 15.090477][ T1] context-{5:5}
> [ 15.090485][ T1] 3 locks held by swapper/0/1:
> [ 15.090497][ T1] #0: c2ff0001816de1a0 (&dev->mutex){....}-{4:4}, at: __device_driver_lock+0x98/0x104
> [ 15.090553][ T1] #1: ffff90001485b4b8 (irq_domain_mutex){+.+.}-{4:4}, at: irq_domain_associate+0xbc/0x6d4
> [ 15.090606][ T1] #2: 4bff000185d7a8e0 (lock_class){....}-{2:2}, at: _raw_spin_lock_irqsave+0x1c/0x28
> [ 15.090654][ T1] stack backtrace:
> [ 15.090661][ T1] CPU: 4 PID: 1 Comm: swapper/0 Not tainted 5.10.59-rt52-00983-g186a6841c682-dirty #3
> [ 15.090682][ T1] Hardware name: Horizon Robotics Journey 5 DVB (DT)
> [ 15.090692][ T1] Call trace:
> ......
> [ 15.090811][ T1] _raw_spin_lock_irqsave+0x1c/0x28
> [ 15.090828][ T1] dwapb_irq_ack+0xb4/0x300
> [ 15.090846][ T1] __irq_do_set_handler+0x494/0xb2c
> [ 15.090864][ T1] __irq_set_handler+0x74/0x114
> [ 15.090881][ T1] irq_set_chip_and_handler_name+0x44/0x58
> [ 15.090900][ T1] gpiochip_irq_map+0x210/0x644
>
> Signed-off-by: Schspa Shi <[email protected]>

LGTM
Acked-by: Linus Walleij <[email protected]>

Mostly hits drivers/gpio so this seems like something Bartosz
should merge.

Yours,
Linus Walleij

2022-04-25 14:00:09

by Bartosz Golaszewski

[permalink] [raw]

Subject: Re: [PATCH v3] gpio: use raw spinlock for gpio chip shadowed data

On Tue, Apr 19, 2022 at 3:28 AM Schspa Shi <[email protected]> wrote:
>
> In case of PREEMPT_RT, there is a raw_spinlock -> spinlock dependency
> as the lockdep report shows.
>
> __irq_set_handler
> irq_get_desc_buslock
> __irq_get_desc_lock
> raw_spin_lock_irqsave(&desc->lock, *flags); // raw spinlock get here
> __irq_do_set_handler
> mask_ack_irq
> dwapb_irq_ack
> spin_lock_irqsave(&gc->bgpio_lock, flags); // sleep able spinlock
> irq_put_desc_busunlock
>
> Replace with a raw lock to avoid BUGs. This lock is only used to access
> registers, and It's safe to replace with the raw lock without bad
> influence.
>
> [ 15.090359][ T1] =============================
> [ 15.090365][ T1] [ BUG: Invalid wait context ]
> [ 15.090373][ T1] 5.10.59-rt52-00983-g186a6841c682-dirty #3 Not tainted
> [ 15.090386][ T1] -----------------------------
> [ 15.090392][ T1] swapper/0/1 is trying to lock:
> [ 15.090402][ T1] 70ff00018507c188 (&gc->bgpio_lock){....}-{3:3}, at: _raw_spin_lock_irqsave+0x1c/0x28
> [ 15.090470][ T1] other info that might help us debug this:
> [ 15.090477][ T1] context-{5:5}
> [ 15.090485][ T1] 3 locks held by swapper/0/1:
> [ 15.090497][ T1] #0: c2ff0001816de1a0 (&dev->mutex){....}-{4:4}, at: __device_driver_lock+0x98/0x104
> [ 15.090553][ T1] #1: ffff90001485b4b8 (irq_domain_mutex){+.+.}-{4:4}, at: irq_domain_associate+0xbc/0x6d4
> [ 15.090606][ T1] #2: 4bff000185d7a8e0 (lock_class){....}-{2:2}, at: _raw_spin_lock_irqsave+0x1c/0x28
> [ 15.090654][ T1] stack backtrace:
> [ 15.090661][ T1] CPU: 4 PID: 1 Comm: swapper/0 Not tainted 5.10.59-rt52-00983-g186a6841c682-dirty #3
> [ 15.090682][ T1] Hardware name: Horizon Robotics Journey 5 DVB (DT)
> [ 15.090692][ T1] Call trace:
> ......
> [ 15.090811][ T1] _raw_spin_lock_irqsave+0x1c/0x28
> [ 15.090828][ T1] dwapb_irq_ack+0xb4/0x300
> [ 15.090846][ T1] __irq_do_set_handler+0x494/0xb2c
> [ 15.090864][ T1] __irq_set_handler+0x74/0x114
> [ 15.090881][ T1] irq_set_chip_and_handler_name+0x44/0x58
> [ 15.090900][ T1] gpiochip_irq_map+0x210/0x644
>
> Signed-off-by: Schspa Shi <[email protected]>
>
> ---

Applied, thanks!

Bart