[lkml]   [2009]   [Feb]   [25]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: [linux-pm] [RFC][PATCH 2/2] PM: Rework handling of interrupts during suspend-resume

    On Wed, 25 Feb 2009, Alan Stern wrote:

    > On Tue, 24 Feb 2009, Rafael J. Wysocki wrote:
    > > I think the most important source of level triggered interrupts are PCI
    > > devices, so perhaps we can make the PCI PM core use bit 10 of the PCI Device
    > > Control register to prevent devices from generating INTx after the drivers'
    > > suspend routines have been executed?
    > I wish that were true. As I recall, the original PCI specification did
    > not define this bit, and older PCI devices don't support it. So you
    > can't count on being able to supress interrupt generation this way.

    It's definitely a new feature. In fact, I think even the current one makes
    it optional, so even for "new" devices it's very unclear how many of them
    actually support that bit.


     \ /
      Last update: 2009-02-25 17:23    [W:0.019 / U:16.276 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site