On 08/18/2016 09:20 AM, Mathias Nyman wrote: > On 18.08.2016 09:27, Felipe Balbi wrote: >> >> Hi, >> >> Greg KH <gre...@linuxfoundation.org> writes: >>> On Wed, Aug 17, 2016 at 09:56:02PM +0200, Filip Ayazi wrote: >>>> Forwarding bug report from bugzilla #153211 as requested: >>>> >>>> System crashes completely during or immediately after installing APK to >>>> android >>>> phone over usb using android studio. I was unable to reproduce this bug any >>>> other way. >>> >>> So the crash is on the host device, or the gadget device (the phone)? >> >> Seems like host side gets stuck :-) That is correct, my apologies for not making it clear. >> >>>> The only way to recover after the crash is a hard restart, netconsole >>>> captures >>>> the following at the time: >>>> [10592.718753] NMI watchdog: BUG: soft lockup - CPU#2 stuck for 23s! >>>> [java:18908] >>>> [10620.720015] NMI watchdog: BUG: soft lockup - CPU#2 stuck for 23s! >>>> [java:18908] >>>> [10648.721278] NMI watchdog: BUG: soft lockup - CPU#2 stuck for 22s! >>>> [java:18908] >>>> [10676.722541] NMI watchdog: BUG: soft lockup - CPU#2 stuck for 22s! >>>> [java:18908] >>>> [10704.723804] NMI watchdog: BUG: soft lockup - CPU#2 stuck for 22s! >>>> [java:18908] >>>> [10732.725067] NMI watchdog: BUG: soft lockup - CPU#2 stuck for 22s! >>>> [java:18908] >>>> [10760.726330] NMI watchdog: BUG: soft lockup - CPU#2 stuck for 22s! >>>> [java:18908] >>>> [10788.727594] NMI watchdog: BUG: soft lockup - CPU#2 stuck for 22s! >>>> [java:18908] >>>> [10816.728857] NMI watchdog: BUG: soft lockup - CPU#2 stuck for 22s! >>>> [java:18908] >>>> [10844.730120] NMI watchdog: BUG: soft lockup - CPU#2 stuck for 22s! >>>> [java:18908] >>>> Bisecting shown that commit >>>> 86065c2719 "xhci: don't rely on precalculated value of needed trbs in the >>>> enqueue loop" >>>> somehow introduced the issue, but I can't find how. >>>> Please let me know how I can help to fix this. >> >> Can you test this commit? >> >> https://git.kernel.org/cgit/linux/kernel/git/mnyman/xhci.git/commit/?h=for-usb-linus&id=5be1233bacedbeb166c4f7a8136c03cec18bf1ee >> >> It's a patch mentioning the same situation >> This patch does indeed fix the problem, thanks. > > The patch is in Greg's usb-linus branch, and on it's way to Linus tree. > 0d2daad xhci: really enqueue zero length TRBs. > > -Mathias > Filip Ayazi
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