[PATCH 6.6 002/444] gpio: pca953x: Simplify code with cleanup helpers

6.6-stable review patch. If anyone has any objections, please let me know.

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From: Andy Shevchenko andriy.shevchenko@linux.intel.com

[ Upstream commit 8e471b784a720f6f34f9fb449ba0744359dcaccb ]

Use macros defined in linux/cleanup.h to automate resource lifetime control in gpio-pca953x.

Signed-off-by: Andy Shevchenko andriy.shevchenko@linux.intel.com Signed-off-by: Bartosz Golaszewski bartosz.golaszewski@linaro.org Stable-dep-of: 3e38f946062b ("gpio: pca953x: fix IRQ storm on system wake up") Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpio/gpio-pca953x.c | 77 ++++++++++++++----------------------- 1 file changed, 29 insertions(+), 48 deletions(-)

diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c index fddf0cf031007..a39c8ebd410e4 100644 --- a/drivers/gpio/gpio-pca953x.c +++ b/drivers/gpio/gpio-pca953x.c @@ -10,6 +10,7 @@

#include <linux/acpi.h> #include <linux/bitmap.h> +#include <linux/cleanup.h> #include <linux/gpio/consumer.h> #include <linux/gpio/driver.h> #include <linux/i2c.h> @@ -519,12 +520,10 @@ static int pca953x_gpio_direction_input(struct gpio_chip *gc, unsigned off) struct pca953x_chip *chip = gpiochip_get_data(gc); u8 dirreg = chip->recalc_addr(chip, chip->regs->direction, off); u8 bit = BIT(off % BANK_SZ); - int ret;

- mutex_lock(&chip->i2c_lock); - ret = regmap_write_bits(chip->regmap, dirreg, bit, bit); - mutex_unlock(&chip->i2c_lock); - return ret; + guard(mutex)(&chip->i2c_lock); + + return regmap_write_bits(chip->regmap, dirreg, bit, bit); }

static int pca953x_gpio_direction_output(struct gpio_chip *gc, @@ -536,17 +535,15 @@ static int pca953x_gpio_direction_output(struct gpio_chip *gc, u8 bit = BIT(off % BANK_SZ); int ret;

- mutex_lock(&chip->i2c_lock); + guard(mutex)(&chip->i2c_lock); + /* set output level */ ret = regmap_write_bits(chip->regmap, outreg, bit, val ? bit : 0); if (ret) - goto exit; + return ret;

/* then direction */ - ret = regmap_write_bits(chip->regmap, dirreg, bit, 0); -exit: - mutex_unlock(&chip->i2c_lock); - return ret; + return regmap_write_bits(chip->regmap, dirreg, bit, 0); }

static int pca953x_gpio_get_value(struct gpio_chip *gc, unsigned off) @@ -557,9 +554,8 @@ static int pca953x_gpio_get_value(struct gpio_chip *gc, unsigned off) u32 reg_val; int ret;

- mutex_lock(&chip->i2c_lock); - ret = regmap_read(chip->regmap, inreg, &reg_val); - mutex_unlock(&chip->i2c_lock); + scoped_guard(mutex, &chip->i2c_lock) + ret = regmap_read(chip->regmap, inreg, &reg_val); if (ret < 0) return ret;

@@ -572,9 +568,9 @@ static void pca953x_gpio_set_value(struct gpio_chip *gc, unsigned off, int val) u8 outreg = chip->recalc_addr(chip, chip->regs->output, off); u8 bit = BIT(off % BANK_SZ);

- mutex_lock(&chip->i2c_lock); + guard(mutex)(&chip->i2c_lock); + regmap_write_bits(chip->regmap, outreg, bit, val ? bit : 0); - mutex_unlock(&chip->i2c_lock); }

static int pca953x_gpio_get_direction(struct gpio_chip *gc, unsigned off) @@ -585,9 +581,8 @@ static int pca953x_gpio_get_direction(struct gpio_chip *gc, unsigned off) u32 reg_val; int ret;

- mutex_lock(&chip->i2c_lock); - ret = regmap_read(chip->regmap, dirreg, &reg_val); - mutex_unlock(&chip->i2c_lock); + scoped_guard(mutex, &chip->i2c_lock) + ret = regmap_read(chip->regmap, dirreg, &reg_val); if (ret < 0) return ret;

@@ -604,9 +599,8 @@ static int pca953x_gpio_get_multiple(struct gpio_chip *gc, DECLARE_BITMAP(reg_val, MAX_LINE); int ret;

- mutex_lock(&chip->i2c_lock); - ret = pca953x_read_regs(chip, chip->regs->input, reg_val); - mutex_unlock(&chip->i2c_lock); + scoped_guard(mutex, &chip->i2c_lock) + ret = pca953x_read_regs(chip, chip->regs->input, reg_val); if (ret) return ret;

@@ -621,16 +615,15 @@ static void pca953x_gpio_set_multiple(struct gpio_chip *gc, DECLARE_BITMAP(reg_val, MAX_LINE); int ret;

- mutex_lock(&chip->i2c_lock); + guard(mutex)(&chip->i2c_lock); + ret = pca953x_read_regs(chip, chip->regs->output, reg_val); if (ret) - goto exit; + return;

bitmap_replace(reg_val, reg_val, bits, mask, gc->ngpio);

pca953x_write_regs(chip, chip->regs->output, reg_val); -exit: - mutex_unlock(&chip->i2c_lock); }

static int pca953x_gpio_set_pull_up_down(struct pca953x_chip *chip, @@ -638,7 +631,6 @@ static int pca953x_gpio_set_pull_up_down(struct pca953x_chip *chip, unsigned long config) { enum pin_config_param param = pinconf_to_config_param(config); - u8 pull_en_reg = chip->recalc_addr(chip, PCAL953X_PULL_EN, offset); u8 pull_sel_reg = chip->recalc_addr(chip, PCAL953X_PULL_SEL, offset); u8 bit = BIT(offset % BANK_SZ); @@ -651,7 +643,7 @@ static int pca953x_gpio_set_pull_up_down(struct pca953x_chip *chip, if (!(chip->driver_data & PCA_PCAL)) return -ENOTSUPP;

- mutex_lock(&chip->i2c_lock); + guard(mutex)(&chip->i2c_lock);

/* Configure pull-up/pull-down */ if (param == PIN_CONFIG_BIAS_PULL_UP) @@ -661,17 +653,13 @@ static int pca953x_gpio_set_pull_up_down(struct pca953x_chip *chip, else ret = 0; if (ret) - goto exit; + return ret;

/* Disable/Enable pull-up/pull-down */ if (param == PIN_CONFIG_BIAS_DISABLE) - ret = regmap_write_bits(chip->regmap, pull_en_reg, bit, 0); + return regmap_write_bits(chip->regmap, pull_en_reg, bit, 0); else - ret = regmap_write_bits(chip->regmap, pull_en_reg, bit, bit); - -exit: - mutex_unlock(&chip->i2c_lock); - return ret; + return regmap_write_bits(chip->regmap, pull_en_reg, bit, bit); }

static int pca953x_gpio_set_config(struct gpio_chip *gc, unsigned int offset, @@ -883,10 +871,8 @@ static irqreturn_t pca953x_irq_handler(int irq, void *devid)

bitmap_zero(pending, MAX_LINE);

- mutex_lock(&chip->i2c_lock); - ret = pca953x_irq_pending(chip, pending); - mutex_unlock(&chip->i2c_lock); - + scoped_guard(mutex, &chip->i2c_lock) + ret = pca953x_irq_pending(chip, pending); if (ret) { ret = 0;

@@ -1221,26 +1207,21 @@ static int pca953x_restore_context(struct pca953x_chip *chip) { int ret;

- mutex_lock(&chip->i2c_lock); + guard(mutex)(&chip->i2c_lock);

regcache_cache_only(chip->regmap, false); regcache_mark_dirty(chip->regmap); ret = pca953x_regcache_sync(chip); - if (ret) { - mutex_unlock(&chip->i2c_lock); + if (ret) return ret; - }

- ret = regcache_sync(chip->regmap); - mutex_unlock(&chip->i2c_lock); - return ret; + return regcache_sync(chip->regmap); }

static void pca953x_save_context(struct pca953x_chip *chip) { - mutex_lock(&chip->i2c_lock); + guard(mutex)(&chip->i2c_lock); regcache_cache_only(chip->regmap, true); - mutex_unlock(&chip->i2c_lock); }

static int pca953x_suspend(struct device *dev)