Re: [ath5k-devel] [PATCH v3] ath5k: disable ASPM

From: Matthew Garrett
Date: Mon Jul 26 2010 - 17:26:14 EST

On Tue, Jul 27, 2010 at 12:17:13AM +0300, Maxim Levitsky wrote:

> However, it is possible, (and that what I asked you) that some ath5k
> devices aren't 'pre 1.1 pcie devices' so linux won't disable ASPM L0s
> for them.
> So indeed for 'good feeling' it is ok to disable L0s from ath5k
> explicitly, but most of the time (or always) it will be no-op.
> In *addition* to that, since you said that ASPM L1 *does* work, and is
> enabled by BIOS, but linux disables it, that it might be worthy to
> enable it again from ath5k driver explicitly.
> As long as wireless works I don't really care if this done or not.

This may need to be done on a chip by chip basis. Take a look at
and some of the other inf files on that site to see which devices
provide the PciASPMOptIn flag - those should support ASPM states even if
they're pre-1.1 devices.

Matthew Garrett | mjg59@xxxxxxxxxxxxx
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