From: Arnd Bergmann Date: Wed, 25 Jan 2017 22:22:36 +0000 (+0100) Subject: leds: ktd2692: avoid harmless maybe-uninitialized warning X-Git-Tag: v4.11-rc1~152^2~3 X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=cbe99c538d1776009e8710755bb6e726f7fffa9b;p=linux.git leds: ktd2692: avoid harmless maybe-uninitialized warning gcc gets confused about the control flow in ktd2692_parse_dt(), causing it to warn about what seems like a potential bug: drivers/leds/leds-ktd2692.c: In function 'ktd2692_probe': drivers/leds/leds-ktd2692.c:244:15: error: '*((void *)&led_cfg+8)' may be used uninitialized in this function [-Werror=maybe-uninitialized] drivers/leds/leds-ktd2692.c:225:7: error: 'led_cfg.flash_max_microamp' may be used uninitialized in this function [-Werror=maybe-uninitialized] drivers/leds/leds-ktd2692.c:232:3: error: 'led_cfg.movie_max_microamp' may be used uninitialized in this function [-Werror=maybe-uninitialized] The code is fine, and slightly reworking it in an equivalent way lets gcc figure that out too, which gets rid of the warning. Fixes: 77e7915b15bb ("leds: ktd2692: Add missing of_node_put") Signed-off-by: Arnd Bergmann Acked-by: Pavel Machek Signed-off-by: Jacek Anaszewski --- diff --git a/drivers/leds/leds-ktd2692.c b/drivers/leds/leds-ktd2692.c index bf23ba191ad0..45296aaca9da 100644 --- a/drivers/leds/leds-ktd2692.c +++ b/drivers/leds/leds-ktd2692.c @@ -270,15 +270,15 @@ static int ktd2692_parse_dt(struct ktd2692_context *led, struct device *dev, return -ENXIO; led->ctrl_gpio = devm_gpiod_get(dev, "ctrl", GPIOD_ASIS); - if (IS_ERR(led->ctrl_gpio)) { - ret = PTR_ERR(led->ctrl_gpio); + ret = PTR_ERR_OR_ZERO(led->ctrl_gpio); + if (ret) { dev_err(dev, "cannot get ctrl-gpios %d\n", ret); return ret; } led->aux_gpio = devm_gpiod_get(dev, "aux", GPIOD_ASIS); - if (IS_ERR(led->aux_gpio)) { - ret = PTR_ERR(led->aux_gpio); + ret = PTR_ERR_OR_ZERO(led->aux_gpio); + if (ret) { dev_err(dev, "cannot get aux-gpios %d\n", ret); return ret; }