Re: [patch 2.6.23-rc3 1/4] EHCI restart speedup

On Wed, Sep 12, 2007 at 12:01:52AM -0700, Geoff Levand wrote:
> Geoff Levand wrote:
> > David Brownell wrote:
> >> From: Marcelo Tosatti <[email protected]>
> >> 
> >> It is not necessary to powerdown the ports on ehci_pci_reinit() when the
> >> chip reset already did that.  Removing this saves 20ms during restart
> >> after poweroff paths (which OLPC uses a lot).
> >> 
> >> To ensure driver startup then behaves consistently, force a reset during
> >> driver startup.  (Not doing this was an accident of some previous changes
> >> to the init sequence.)
> >> 
> >> Make the corresponding change in the PS3 support.  It's not clear what
> >> ehci-fsl should do here; it has similar code to the PS3.
> >> 
> >> Signed-off-by: Marcelo Tosatti <[email protected]>
> >> Signed-off-by: David Brownell <[email protected]>
> >> Cc: [email protected]
> >> Cc: [email protected]
> >> ---
> >>  drivers/usb/host/ehci-pci.c |    5 +----
> >>  drivers/usb/host/ehci-ps3.c |    2 +-
> >>  2 files changed, 2 insertions(+), 5 deletions(-)
> > 
> > I tested this on PS3 with kernels both programed into flash, and
> > booted via kexec. Seems to work OK.
> > 
> > Acked-by: Geoff Levand <[email protected]>
> 
> Hi Dave,
> 
> I was expecting to see this go into 2.6.23, but it seems to be missing.
> Could you let me know the status?

It's in my queue to go into 2.6.24, I didn't realize that it was
something needed for 2.6.23.  If you want, I can queue it up to go into
the first 2.6.23-stable release.

thanks,

greg k-h

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