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

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]>


-------------------------------------------------------------------------
This SF.net email is sponsored by: Splunk Inc.
Still grepping through log files to find problems?  Stop.
Now Search log events and configuration files using AJAX and a browser.
Download your FREE copy of Splunk now >>  http://get.splunk.com/
_______________________________________________
[email protected]
To unsubscribe, use the last form field at:
https://lists.sourceforge.net/lists/listinfo/linux-usb-devel