Hi,


Since three recent next releases (first on 20160630), on Odroid XU3 board
the USB 3.0 host port (the only one) stopped working.

This is a "samsung,exynos5250-dwusb3" (drivers/usb/dwc3/dwc3-exynos.c).

Two issues here:
1. The port does not show up as USB 3.0 device.
This one device is missing:
	Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub

2. The port does not work even for 2.0 devices (I didn't test 1.0).


config: exynos_defconfig (ARM)
DTS: exynos5422-odroidxu3.dts


Bisect points to merge commit:
# first bad commit: [215db9481814bfae69cde49d82865c74189e435f] Merge tag 'usb-for-v4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-next

Bisect log:
# bad: [d936b5e461b9545fa9a8a3357a40eea17aea5e28] Add linux-next specific files for 20160701
# good: [1a0a02d1efa066001fd315c1b4df583d939fa2c4] Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
git bisect start 'next/master' 'next/stable'
# good: [e3f87b945da70903776e67a549ab3df78c4d6389] Merge remote-tracking branch 'drm/drm-next'
git bisect good e3f87b945da70903776e67a549ab3df78c4d6389
# good: [d71ef0d1368d8d6054ef44765c0f1fe866f4b2e0] Merge remote-tracking branch 'clockevents/clockevents/next'
git bisect good d71ef0d1368d8d6054ef44765c0f1fe866f4b2e0
# bad: [9aff7978ef28c3eb5415c624049c189d48b13dff] Merge remote-tracking branch 'staging/staging-next'
git bisect bad 9aff7978ef28c3eb5415c624049c189d48b13dff
# good: [47feda95152a47aa15091c93ea7ad82869127278] Merge remote-tracking branch 'tty/tty-next'
git bisect good 47feda95152a47aa15091c93ea7ad82869127278
# good: [6f65aa8925f7a908eb4d08339c03c40a300ac461] staging/android: make sw_ioctl info internal to sw_sync.c
git bisect good 6f65aa8925f7a908eb4d08339c03c40a300ac461
# bad: [215db9481814bfae69cde49d82865c74189e435f] Merge tag 'usb-for-v4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-next
git bisect bad 215db9481814bfae69cde49d82865c74189e435f
# good: [f2df679b6c556fd3b0b7ffafea170f1679086455] usb: dwc3: gadget: avoid while(1) in run_stop()
git bisect good f2df679b6c556fd3b0b7ffafea170f1679086455
# good: [0d7995031a8e7a34e5638d57a44a51aae39e321c] usb: renesas_usbhs: show error code when probe failed
git bisect good 0d7995031a8e7a34e5638d57a44a51aae39e321c
# good: [86065c2719a5685cef36945f09def3f0658c7860] xhci: don't rely on precalculated value of needed trbs in the enqueue loop
git bisect good 86065c2719a5685cef36945f09def3f0658c7860
# good: [95b57df45062d7005ff01ed956b69166b6b3481e] usb: dwc3: host: use build-in property instead of platform data
git bisect good 95b57df45062d7005ff01ed956b69166b6b3481e
# good: [4fdef698383db07d829da567e0e405fc41ff3a89] usb: renesas_usbhs: fix NULL pointer dereference in xfer_work()
git bisect good 4fdef698383db07d829da567e0e405fc41ff3a89
# good: [4e84e22195910b315b36eca149febd0a6b02f7c4] usb: early/ehci-dbgp: make it explicitly non-modular
git bisect good 4e84e22195910b315b36eca149febd0a6b02f7c4
# good: [107a4b535b7d1da4203a26949775d67173e96e04] usb: renesas_usbhs: make usbhs_write32() static
git bisect good 107a4b535b7d1da4203a26949775d67173e96e04
# good: [15e4292a2d21e9997fdb2b8c014cc461b3f268f0] usb: renesas_usbhs: protect the CFIFOSEL setting in usbhsg_ep_enable()
git bisect good 15e4292a2d21e9997fdb2b8c014cc461b3f268f0
# first bad commit: [215db9481814bfae69cde49d82865c74189e435f] Merge tag 'usb-for-v4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-next

Attached dmesg - good and bad.


Please let me know if you need more information.

Best regards,
Krzysztof