lkml.org 
[lkml]   [2011]   [Nov]   [1]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    SubjectRe: [RFC] Input: Remove unsafe device module references
    From
    On Tue, Nov 1, 2011 at 7:00 PM, Greg KH <gregkh@suse.de> wrote:
    > On Tue, Nov 01, 2011 at 06:52:11PM +0100, David Herrmann wrote:
    >> My solution: Some parent subsystem of us must take and release this
    >> module-refcnt instead of us, so this bug doesn't occur.
    >
    > Yes, that is the ultimate solution for something like this.
    >
    > But, in reality, we don't care about module unloading races as there are
    > plenty of other issues involved there where things can go bad, so we
    > just try the best we can :)

    Ah, I am kind of relieved that I got this right. I almost started
    thinking I am insane.. ;)

    So your answer is that this is so unlikely that it won't be fixed? I
    am fine with that, even though I wonder why stuff like "struct
    file_operations" include "owner" fields to protect callbacks but
    "struct device_type" does *not* include any protection of it's
    "release" callback.
    This is why I thought calling module_get/put() inside the driver-core
    would be just consistent with other subsystems.

    But if this race is fine, I will simply copy it.

    > thanks,
    >
    > greg k-h

    Sorry for the confusion and thanks for your answers.
    Regards
    David


    \
     
     \ /
      Last update: 2011-11-01 19:11    [W:3.875 / U:0.208 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site