This is a note to let you know that I've just added the patch titled
leds: ktd2692: avoid harmless maybe-uninitialized warning
to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
leds-ktd2692-avoid-harmless-maybe-uninitialized-warning.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From cbe99c538d1776009e8710755bb6e726f7fffa9b Mon Sep 17 00:00:00 2001
From: Arnd Bergmann <arnd@xxxxxxxx>
Date: Wed, 25 Jan 2017 23:22:36 +0100
Subject: leds: ktd2692: avoid harmless maybe-uninitialized warning
From: Arnd Bergmann <arnd@xxxxxxxx>
commit cbe99c538d1776009e8710755bb6e726f7fffa9b upstream.
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 <arnd@xxxxxxxx>
Acked-by: Pavel Machek <pavel@xxxxxx>
Signed-off-by: Jacek Anaszewski <jacek.anaszewski@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/leds/leds-ktd2692.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
--- a/drivers/leds/leds-ktd2692.c
+++ b/drivers/leds/leds-ktd2692.c
@@ -296,15 +296,15 @@ static int ktd2692_parse_dt(struct ktd26
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;
}
Patches currently in stable-queue which might be from arnd@xxxxxxxx are
queue-4.4/arm-8452-3-pj4-make-coprocessor-access-sequences-buildable-in-thumb2-mode.patch
queue-4.4/leds-ktd2692-avoid-harmless-maybe-uninitialized-warning.patch