Thread (6 messages) 6 messages, 4 authors, 2018-10-09

Re: [PATCH] backlight: lm3639: Unconditionally call led_classdev_unregister

From: Lee Jones <hidden>
Date: 2018-10-09 09:10:55
Also in: dri-devel, lkml

On Fri, 21 Sep 2018, Nathan Chancellor wrote:
Clang warns that the address of a pointer will always evaluated as true
in a boolean context.

drivers/video/backlight/lm3639_bl.c:403:14: warning: address of
'pchip->cdev_torch' will always evaluate to 'true'
[-Wpointer-bool-conversion]
        if (&pchip->cdev_torch)
        ~~   ~~~~~~~^~~~~~~~~~
drivers/video/backlight/lm3639_bl.c:405:14: warning: address of
'pchip->cdev_flash' will always evaluate to 'true'
[-Wpointer-bool-conversion]
        if (&pchip->cdev_flash)
        ~~   ~~~~~~~^~~~~~~~~~
2 warnings generated.

These statements have been present since 2012, introduced by
commit 0f59858d5119 ("backlight: add new lm3639 backlight
driver"). Given that they have been called unconditionally since
then presumably without any issues, removing the always true if
statements to fix the warnings without any real world changes.

Link: https://github.com/ClangBuiltLinux/linux/issues/119
Signed-off-by: Nathan Chancellor <redacted>
---

Alternatively, it's possible the address wasn't supposed to be taken or
the dev in these structs should be checked instead. I don't have this
hardware to make that call so I would appreciate some review and
opinions on what was intended here.

Thanks!

 drivers/video/backlight/lm3639_bl.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)
Applied, thanks.

-- 
Lee Jones [李琼斯]
Linaro Services Technical Lead
Linaro.org │ Open source software for ARM SoCs
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