Re: [linux-pm] [patch 2.6.25-rc6 3/7] pci_choose_state() cleanup and fixes

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Friday 21 March 2008, Rafael J. Wysocki wrote:
> > 
> > You seem to object to letting drivers offload this particular
> > bit of work to infrastructure.
> 
> No, I don't.  I just don't think it's a good idea to change the existing and
> widely used function for this purpose.  If I needed some specific functionality
> at the infrastructure level, I'd add a new function for that with a new
> changelog etc.  Then, made drivers switch to that and remove the old one.

I see that a lot of drivers have at some point, not long ago,
been converted to use this routine.  They previously just
used PCI_D3 in all cases.

It seems to me that your objection boils down to the concern
that those drivers may just have pushed their bug out a level,
rather than actually fixing their bugs.

Which I can sympathize with ... but that doesn't change the
fact that any driver in that position *still* has a bug that
needs to be fixed.  And if that bug is highlighted by this
patch ... well, there's still a driver bug to be fixed.


> > >     [Note that with the new suspend/hibernation callbacks there
> > > won't be the pm_message_t argument to pass to pci_choose_state().]
> >
> > The pm_message_t will necessarily linger until all drivers have
> > been converted and re-tested.  Which can't be an overnight thing.
>
> No, it can't.  Still, suppose a driver is using the new callbacks.  How is
> it supposed to use pci_choose_state()?

Hey, you're the one providing those callbacks.  How were you
going to answer that question *before* I posted this overdue
bugfix patch for pci_choose_state()?

- Dave

--
To unsubscribe from this list: send the line "unsubscribe linux-acpi" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html

[Index of Archives]     [Linux IBM ACPI]     [Linux Power Management]     [Linux Kernel]     [Linux Laptop]     [Kernel Newbies]     [Share Photos]     [Security]     [Netfilter]     [Bugtraq]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Samba]     [Video 4 Linux]     [Device Mapper]     [Linux Resources]

  Powered by Linux