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Re: [PATCH v3 00/19] Report power supply from hid-logitech-hidpp

From Dave Hansen <dave.hansen@intel.com>
Newsgroups linux.kernel
Subject Re: [PATCH v3 00/19] Report power supply from hid-logitech-hidpp
Date 2017-06-05 17:00 +0200
Message-ID <tP1E6-4e8-11@gated-at.bofh.it> (permalink)
References (2 earlier) <tNE6T-6SI-25@gated-at.bofh.it> <tNPbY-6hW-17@gated-at.bofh.it> <tNVAK-2ht-5@gated-at.bofh.it> <tOVfk-kl-17@gated-at.bofh.it> <tOZVE-3jm-29@gated-at.bofh.it>
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On 06/05/2017 06:09 AM, Bastien Nocera wrote:
>> I agree with Dave. If there is no solution found in time for -rc5, 
>> reverting to previous state would be the proper way to go.
> I don't see how it's possible to retroactively fix user-space.

It's not possible to retroactively change userspace.  That why the
kernel tries so hard not to break it in the first place.  Although this
is in "minor annoyance" territory for me at the moment, this patch
causes a clear, user-visible issue with new kernels.

The right way to do this is to have the kernel export the data in a way
that does not confuse old userspace.  Perhaps we should separate out
"power supplies that run the system" from "power supplies in a perihperal".

And, no, a config option isn't the right thing either.

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Thread

Re: [PATCH v3 00/19] Report power supply from hid-logitech-hidpp Dave Hansen <dave.hansen@intel.com> - 2017-06-01 20:10 +0200
  Re: [PATCH v3 00/19] Report power supply from hid-logitech-hidpp Bastien Nocera <hadess@hadess.net> - 2017-06-01 21:40 +0200
    Re: [PATCH v3 00/19] Report power supply from hid-logitech-hidpp Benjamin Tissoires <benjamin.tissoires@redhat.com> - 2017-06-02 09:30 +0200
      Re: [PATCH v3 00/19] Report power supply from hid-logitech-hidpp Bastien Nocera <hadess@hadess.net> - 2017-06-02 15:00 +0200
        Re: [PATCH v3 00/19] Report power supply from hid-logitech-hidpp Benjamin Tissoires <benjamin.tissoires@redhat.com> - 2017-06-02 15:50 +0200
      Re: [PATCH v3 00/19] Report power supply from hid-logitech-hidpp Dave Hansen <dave.hansen@intel.com> - 2017-06-02 16:20 +0200
        Re: [PATCH v3 00/19] Report power supply from hid-logitech-hidpp Jiri Kosina <jikos@kernel.org> - 2017-06-05 10:10 +0200
          Re: [PATCH v3 00/19] Report power supply from hid-logitech-hidpp Bastien Nocera <hadess@hadess.net> - 2017-06-05 15:10 +0200
            Re: [PATCH v3 00/19] Report power supply from hid-logitech-hidpp Dave Hansen <dave.hansen@intel.com> - 2017-06-05 17:00 +0200
              Re: [PATCH v3 00/19] Report power supply from hid-logitech-hidpp Bastien Nocera <hadess@hadess.net> - 2017-06-05 19:20 +0200
          Re: [PATCH v3 00/19] Report power supply from hid-logitech-hidpp Benjamin Tissoires <benjamin.tissoires@redhat.com> - 2017-06-06 09:30 +0200
            Re: [PATCH v3 00/19] Report power supply from hid-logitech-hidpp Bastien Nocera <hadess@hadess.net> - 2017-06-06 09:50 +0200

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