Re: [PATCH v4 1/3] leds: Introduce userspace leds driver

From: Pavel Machek
Date: Wed Nov 09 2016 - 02:05:24 EST


Hi!

> >+struct uleds_device {
> >+ struct uleds_user_dev user_dev;
> >+ struct led_classdev led_cdev;
> >+ struct mutex mutex;
> >+ enum uleds_state state;
> >+ wait_queue_head_t waitq;
> >+ unsigned char brightness;
>
> I've just noticed that this is wrong, since LED subsystem
> brightness type is enum led_brightness, i.e. int.
> LED_FULL (255) value is a legacy enum value that can be overridden
> by max_brightness property.
>
> Please submit a fix so that I could merge it with the original
> patch before sending it upstream.

Actually... perhaps you want to wait with merging the userspace driver
till the locking is solved in the LED subsystem? Maybe I'm wrong, but
I have feeling that userspace driver will have unusual requirements
w.r.t. locking, and that it would be good to have that solved,
first...

Best regards,
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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