Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1475538

Re: [RFC] fs: add userspace critical mounts event support

Show all headers | View raw

On Fri, Sep 2, 2016 at 9:11 PM, Linus Torvalds
<torvalds@linux-foundation.org> wrote:
> On Fri, Sep 2, 2016 at 5:20 PM, Luis R. Rodriguez <mcgrof@kernel.org> wrote:
>>
>> Thoughts ?
>
> I really think this is a horrible hack.
>
> It's basically the kernel giving up, and relying on user space to give
> a single flag, and it's broken nasty crap.  Worse, it's broken nasty
> crap with a user interface, so we'll be stuck with it forever. Please
> no.

I agree that interface is bad, but I do believe we need something like this...

>
> What are the drivers that need this, and why can't those drivers just
> be fixed to not do braindead things?

Like what? Some devices do need to have firmware loaded so we know
their capabilities, so we really can't push the firmware loading into
"open". If your touch controller for some reason decided to crap over
it's nvram and comes in bootloader mode it is nice for it to slurp in
config data or firmware so use does not have to trigger update
manually. And while the controller is in bootloader mode we can't
create input device because we do not know what capabilities to
declare.

These devices we want to probe asynchronously and simply tell firmware
loader to wait for firmware to become available. The problem we do not
know when to give up, since we do not know where the firmware might
be. But userspace knows and can tel us.

Thanks.

-- 
Dmitry

Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

Re: [PATCH v2 2/5] firmware: annotate thou shalt not request fw on  init or probe Daniel Vetter <daniel.vetter@ffwll.ch> - 2016-08-25 13:10 +0200
  Re: [PATCH v2 2/5] firmware: annotate thou shalt not request fw on  init or probe "Luis R. Rodriguez" <mcgrof@kernel.org> - 2016-08-25 21:50 +0200
    Re: [PATCH v2 2/5] firmware: annotate thou shalt not request fw on  init or probe Daniel Vetter <daniel.vetter@ffwll.ch> - 2016-08-25 22:20 +0200
      Re: [PATCH v2 2/5] firmware: annotate thou shalt not request fw on  init or probe "Luis R. Rodriguez" <mcgrof@kernel.org> - 2016-08-25 22:30 +0200
    Re: [PATCH v2 2/5] firmware: annotate thou shalt not request fw on  init or probe Dmitry Torokhov <dmitry.torokhov@gmail.com> - 2016-08-25 22:40 +0200
    Re: [PATCH v2 2/5] firmware: annotate thou shalt not request fw on  init or probe "Luis R. Rodriguez" <mcgrof@kernel.org> - 2016-09-03 02:00 +0200
      [RFC] fs: add userspace critical mounts event support "Luis R. Rodriguez" <mcgrof@kernel.org> - 2016-09-03 02:30 +0200
        Re: [RFC] fs: add userspace critical mounts event support Linus Torvalds <torvalds@linux-foundation.org> - 2016-09-03 06:20 +0200
          Re: [RFC] fs: add userspace critical mounts event support Dmitry Torokhov <dmitry.torokhov@gmail.com> - 2016-09-03 06:30 +0200
            Re: [RFC] fs: add userspace critical mounts event support Dmitry Torokhov <dmitry.torokhov@gmail.com> - 2016-09-03 20:00 +0200
              Re: [RFC] fs: add userspace critical mounts event support Dmitry Torokhov <dmitry.torokhov@gmail.com> - 2016-09-03 20:20 +0200
                Re: [RFC] fs: add userspace critical mounts event support "Luis R. Rodriguez" <mcgrof@kernel.org> - 2016-09-07 00:00 +0200
                Re: [RFC] fs: add userspace critical mounts event support Bjorn Andersson <bjorn.andersson@linaro.org> - 2016-09-07 00:30 +0200
                Re: [RFC] fs: add userspace critical mounts event support "Luis R. Rodriguez" <mcgrof@kernel.org> - 2016-09-07 01:20 +0200
              Re: [RFC] fs: add userspace critical mounts event support Linus Torvalds <torvalds@linux-foundation.org> - 2016-09-03 20:30 +0200
          Re: [RFC] fs: add userspace critical mounts event support Bjorn Andersson <bjorn.andersson@linaro.org> - 2016-09-06 19:50 +0200
            Re: [RFC] fs: add userspace critical mounts event support Linus Torvalds <torvalds@linux-foundation.org> - 2016-09-06 20:40 +0200
              Re: [RFC] fs: add userspace critical mounts event support Bjorn Andersson <bjorn.andersson@linaro.org> - 2016-09-06 23:20 +0200
                Re: [RFC] fs: add userspace critical mounts event support Linus Torvalds <torvalds@linux-foundation.org> - 2016-09-07 00:00 +0200
                Re: [RFC] fs: add userspace critical mounts event support "Luis R. Rodriguez" <mcgrof@kernel.org> - 2016-09-07 01:10 +0200
              Re: [RFC] fs: add userspace critical mounts event support "Luis R. Rodriguez" <mcgrof@kernel.org> - 2016-09-07 00:40 +0200

csiph-web