gpiolib: Avoid calling chip->request() for unused gpios
Add a check for unused gpios to avoid chip->request() call to client driver for unused gpios. Signed-off-by: Biju Das <biju.das@bp.renesas.com> Reviewed-by: Fabrizio Castro <fabrizio.castro@bp.renesas.com> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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@ -2267,6 +2267,7 @@ static int gpiod_request_commit(struct gpio_desc *desc, const char *label)
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struct gpio_chip *chip = desc->gdev->chip;
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int status;
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unsigned long flags;
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unsigned offset;
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spin_lock_irqsave(&gpio_lock, flags);
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@ -2285,7 +2286,11 @@ static int gpiod_request_commit(struct gpio_desc *desc, const char *label)
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if (chip->request) {
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/* chip->request may sleep */
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spin_unlock_irqrestore(&gpio_lock, flags);
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status = chip->request(chip, gpio_chip_hwgpio(desc));
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offset = gpio_chip_hwgpio(desc);
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if (gpiochip_line_is_valid(chip, offset))
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status = chip->request(chip, offset);
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else
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status = -EINVAL;
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spin_lock_irqsave(&gpio_lock, flags);
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if (status < 0) {
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