Re: [PATCH] input&tty: Fix the keyboard led light display problem

[gregkh <gregkh@linuxfoundation.org>]

On Thu, Oct 14, 2021 at 12:50:31PM +0800, changlianzhi@uniontech.com wrote:
> Subject: [PATCH] input&tty: Fix the keyboard led light display problem
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> 
> Switching from the desktop environment to the tty environment,
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> the state of the keyboard led lights and the state of the keyboard
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> lock are inconsistent. This is because the attribute kb->kbdmode
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> of the tty bound in the desktop environment (xorg) is set to
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> VC_OFF, which causes the ledstate and kb->ledflagstate
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> values of the bound tty to always be 0, which causes the switch
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> from the desktop When to the tty environment, the LED light
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> status is inconsistent with the keyboard lock status.
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>  
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> Signed-off-by: lianzhi chang <changlianzhi@uniontech.com>
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> 
> ---
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> 
> 
> drivers/input/input.c     |  7 ++++++-
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> 
> drivers/tty/vt/keyboard.c | 30 +++++++++++++++++++++++++++++-
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> include/linux/kbd_kern.h  |  2 ++
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> 3 files changed, 37 insertions(+), 2 deletions(-)
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>  
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> diff --git a/drivers/input/input.c b/drivers/input/input.c
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> index ccaeb2426385..43c09700bf68 100644
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> --- a/drivers/input/input.c
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> +++ b/drivers/input/input.c
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> @@ -25,6 +25,7 @@
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> #include <linux/rcupdate.h>
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> #include "input-compat.h"
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> #include "input-poller.h"
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> +#include <linux/kbd_kern.h>
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> MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>");
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> MODULE_DESCRIPTION("Input core");
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> 
> @@ -472,8 +473,12 @@ void input_inject_event(struct input_handle *handle,
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> rcu_read_lock();
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> grab = rcu_dereference(dev->grab);
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> - if (!grab || grab == handle)
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> + if (!grab || grab == handle) {
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> input_handle_event(dev, type, code, value);
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> +
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> + if (type == EV_LED && code < LED_SCROLLL)
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> + update_value_ledstate(code, value);
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> + }
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> rcu_read_unlock();
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> spin_unlock_irqrestore(&dev->event_lock, flags);
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> diff --git a/drivers/tty/vt/keyboard.c b/drivers/tty/vt/keyboard.c
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> index c7fbbcdcc346..0240915cdfef 100644
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> --- a/drivers/tty/vt/keyboard.c
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> +++ b/drivers/tty/vt/keyboard.c
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> @@ -1140,6 +1140,31 @@ static unsigned char getledstate(void)
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> return ledstate & 0xff;
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> }
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> +void update_value_ledstate(unsigned int flag, unsigned int value)
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> +{
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> + unsigned int bit;
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> +
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> + switch (flag) {
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> + case LED_NUML:
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> + bit = VC_NUMLOCK;
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> + break;
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> + case LED_CAPSL:
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> 

<snip>

Something went very wrong with this patch submission :(

Please fix up your email client and try again, or just use 'git
send-email' directly, as that should be all that you need here.

thanks,

greg k-h