[U-Boot] Regression due to 020bbcb "usb: hub: Power-cycle on root-hub ports"

[Marek Vasut]

Dear Stephen Warren,

> On 07/08/2013 11:03 AM, Marek Vasut wrote:
> > Dear Stephen Warren,
> > 
> >> On 07/08/2013 07:25 AM, Vivek Gautam wrote:
> >>> On Mon, Jul 8, 2013 at 6:33 PM, Marek Vasut <marex at denx.de> wrote:
> >>>>> On Mon, Jul 1, 2013 at 10:11 PM, Stephen Warren
> >>>>> <swarren at wwwdotorg.org>
> > 
> > wrote:
> >>>>>> On 07/01/2013 07:49 AM, Vivek Gautam wrote:
> >>>>>>> On Sun, Jun 30, 2013 at 10:08 PM, Marek Vasut <marex at denx.de> wrote:
> >>>>>>>>> (Sorry to those on to/cc; I'm resending this so it goes to the
> >>>>>>>>> correct mailing list)
> >>>>>>> 
> >>>>>>> Dear Stephen,
> >>>>>>> sorry for the delay in responding to this.
> >>>>>>> 
> >>>>>>>>> Commit 020bbcb "usb: hub: Power-cycle on root-hub ports" causes a
> >>>>>>>>> regression on Tegra systems.
> 
> ...
> 
> >>>> Vivek, what do I have to revert to fix this flub? I will do that now,
> >>>> since this discussion is stalled.
> >>> 
> >>> 0bf796f usb: hub: Parallelize power-cycling of root-hub ports
> >>> 020bbcb usb: hub: Power-cycle on root-hub ports
> >>> 
> >>> Above two patches are the one which changed the hub_power_on()
> >>> functionality. If Stephen can confirm that reverting these patches
> >>> really solves the problem on Tegra,
> >>> we can revert them.
> >> 
> >> Yes, I have been reverting those two commits locally for a while, and it
> >> solves the problem for me.
> > 
> > Reverted, please test u-boot-usb/master .
> 
> Well, it works, but it turns out the reverts aren't needed. Simon Glass
> already found the problem, and fixed it with:
> 
> ed10e66 usb: Correct CLEAR_FEATURE code in ehci-hcd
> 
> Sorry for not noticing this earlier, but since there hadn't been any
> news in this thread, and there weren't any relevant changes to the
> power-cycling code affected by the problematic patches, it didn't occur
> to me that the problem may have already been fixed elsewhere, so I
> didn't ever retest the issue with a newer commit than that one where I
> originally found the problem:-(

OK, I dropped the reverts, retest again please.

Best regards,
Marek Vasut