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pwm: Remove set but not set variable 'pwm'

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[ Upstream commit 9871abffc81048e20f02e15d6aa4558a44ad53ea ]

Fixes gcc '-Wunused-but-set-variable' warning:

	drivers/pwm/pwm-pca9685.c: In function ‘pca9685_pwm_gpio_free’:
	drivers/pwm/pwm-pca9685.c:162:21: warning: variable ‘pwm’ set but not used [-Wunused-but-set-variable]

It is never used, and so can be removed. In that case, hold and release
the lock 'pca->lock' can be removed since nothing will be done between
them.

Fixes: e926b12c611c ("pwm: Clear chip_data in pwm_put()")
Signed-off-by: yu kuai <yukuai3@huawei.com>
Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
yu kuai 2020-01-20 19:51:43 +08:00 committed by Greg Kroah-Hartman
parent 3c353d7649
commit 8e1b704461
1 changed files with 0 additions and 4 deletions
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4
drivers/pwm/pwm-pca9685.c
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@ -170,13 +170,9 @@ static void pca9685_pwm_gpio_set(struct gpio_chip *gpio, unsigned int offset,
static void pca9685_pwm_gpio_free(struct gpio_chip *gpio, unsigned int offset)
{
struct pca9685 *pca = gpiochip_get_data(gpio);
struct pwm_device *pwm;
pca9685_pwm_gpio_set(gpio, offset, 0);
pm_runtime_put(pca->chip.dev);
mutex_lock(&pca->lock);
pwm = &pca->chip.pwms[offset];
mutex_unlock(&pca->lock);
}
static int pca9685_pwm_gpio_get_direction(struct gpio_chip *chip,