Hi, Vignesh R <vigneshr@xxxxxx> writes: >> Vignesh R <vigneshr@xxxxxx> writes: >>> On Wednesday 28 June 2017 04:00 PM, Tony Lindgren wrote: >>>> Felipe Balbi <felipe.balbi@xxxxxxxxxxxxxxx> [170628 01:32]: >>>>> Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx> writes: >>>>>> On Tue, Jun 27, 2017 at 02:28:56PM -0400, Carlos Hernandez wrote: >>>>>>> Still seeing AM57xx/DRA72/DRA7x usb-related boot failures on linux-next... >>>>>> >>>>>> Is this a regression? If so, any specific commit that caused it? >>>>> >>>>> I did ask for a bisection last time but nobody from TI replied ;-) >>>>> >>>>> https://marc.info/?i=87h8zi4gmx.fsf@xxxxxxxxxxxxxxx >>>>> >>>>> Can't really help without bisection logs :-) >>>> >>>> Seems this warning got add with 04c848d39879 ("genirq: Warn when >>>> IRQ_NOAUTOEN is used with shared interrupts"). The fix is to get >>>> rid of IRQ_NOAUTOEN and enable_irq for a shared interrupt. Hard >>>> to say as the warning line does not match the version of next I >>>> have so this should be verified. >>>> >>> >>> There seems to be two different problems here. >>> One is what Tony is pointing to above that throws a first warn dump >>> during dwc3_omap_probe(). >>> >>> Second one is the imprecise external abort that happens later: >>> [ 24.809939] Unhandled fault: imprecise external abort (0x1406) at >>> 0x00000000 >>> >>> Bisecting the second issue lead to the first bad commit as: >>> commit f54edb539c1167e7a96073848d0afad100df4580 >>> Author: Felipe Balbi <felipe.balbi@xxxxxxxxxxxxxxx> >>> Date: Mon Jun 5 17:03:18 2017 +0300 >>> >>> usb: dwc3: core: initialize ULPI before trying to get the PHY >>> >>> If don't reorder initialization like this, we will never be able to >>> get a reference to ULPI PHYs. >>> >>> Signed-off-by: Felipe Balbi <felipe.balbi@xxxxxxxxxxxxxxx> >>> >>> >>> >>> Reverting above commit from -next seems to help. >> >> reverting will break other things. Seems like we should move >> pm_runtime_* operations a little earlier to ensure clocks are enabled >> early enough. >> > > Looking at the above commit, I see that call to dwc3_core_get_phy() is > now moved from dwc3_probe() to dwc3_core_init() after > dwc3_core_soft_reset(). But dwc3_core_soft_reset() calls phy_init(), > therefore dwc3_core_get_phy() needs to be called before > dwc3_core_soft_reset(). > > Below diff fixes the issue on DRA7xx platforms. I can submit a formal > patch, if it looks fine. > > > diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c > index 326b302fc440..03474d3575ab 100644 > --- a/drivers/usb/dwc3/core.c > +++ b/drivers/usb/dwc3/core.c > @@ -766,15 +766,15 @@ static int dwc3_core_init(struct dwc3 *dwc) > dwc->maximum_speed = USB_SPEED_HIGH; > } > > - ret = dwc3_core_soft_reset(dwc); > + ret = dwc3_core_get_phy(dwc); > if (ret) > goto err0; > > - ret = dwc3_phy_setup(dwc); > + ret = dwc3_core_soft_reset(dwc); > if (ret) > goto err0; > > - ret = dwc3_core_get_phy(dwc); > + ret = dwc3_phy_setup(dwc); > if (ret) > goto err0; cool, thanks for figuring this one out ;-) -- balbi
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