From 540cffbab8b8e6c52a4121666ca18d6e94586ed2 Mon Sep 17 00:00:00 2001 From: Andrey Gusakov Date: Thu, 23 Sep 2021 20:22:16 +0300 Subject: [PATCH] gpio: pca953x: do not ignore i2c errors Per gpio_chip interface, error shall be proparated to the caller. Attempt to silent diagnostics by returning zero (as written in the comment) is plain wrong, because the zero return can be interpreted by the caller as the gpio value. Cc: stable@vger.kernel.org Signed-off-by: Andrey Gusakov Signed-off-by: Nikita Yushchenko Signed-off-by: Bartosz Golaszewski --- drivers/gpio/gpio-pca953x.c | 11 ++--------- 1 file changed, 2 insertions(+), 9 deletions(-) diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c index f5cfc0698799..8ebf369b3ba0 100644 --- a/drivers/gpio/gpio-pca953x.c +++ b/drivers/gpio/gpio-pca953x.c @@ -468,15 +468,8 @@ static int pca953x_gpio_get_value(struct gpio_chip *gc, unsigned off) mutex_lock(&chip->i2c_lock); ret = regmap_read(chip->regmap, inreg, ®_val); mutex_unlock(&chip->i2c_lock); - if (ret < 0) { - /* - * NOTE: - * diagnostic already emitted; that's all we should - * do unless gpio_*_value_cansleep() calls become different - * from their nonsleeping siblings (and report faults). - */ - return 0; - } + if (ret < 0) + return ret; return !!(reg_val & bit); } -- 2.20.1