linux-kernel - Re: First kernel patch (optimization)

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Message-ID: <CANpvso5hPny-1kMxpZB8wXDctwpAQEyQHWwG6Pxx6K0Nm84PEQ@mail.gmail.com>
Date:	Sat, 26 Sep 2015 14:28:04 +0100
From:	Eric Curtin <ericcurtin17@...il.com>
To:	Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Valentina Manea <valentina.manea.m@...il.com>,
	Shuah Khan <shuah.kh@...sung.com>,
	USB list <linux-usb@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: First kernel patch (optimization)

Hi Dimitry,

> Is it Debian-derivative by any chance? Their capslock setup is wonky
> because CapsLock key does no actually set up as a CapsLock but another
> modifier. Also is it in X or is it on text console? Because X handles
> led state on its own...

I'm on Fedora 22. Yeah, you're correct X is handling this, the led does
not turn on at all in text console. Tried Wayland also for the first time
to see if it occurred there also, it does. Does this mean I should not be
looking at kernel code all to fix this issue and I should be looking at
X/Wayland?

>> I think it is something to do with the LED_CAPSL variable
>> in here:
>>
>> drivers/hid/usbhid/usbkbd.c
>
> I do not think you are using usbkbd driver - it is for keyboards in
> "boot protocol" and barely anyone users them in such mode. You need to
> look into drivers/hid/hid-input.c.

Yeah, I realize this now (see "Problems with printk logs and my driver"
email thread), they are talking about renaming this file now as I am not
the first one to make this mistake.
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