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Date:      Mon, 06 Nov 2017 09:26:37 +0000
From:      bugzilla-noreply@freebsd.org
To:        freebsd-usb@FreeBSD.org
Subject:   [Bug 222624] [usb] [panic] thread's sleep queue 0 is not empty at usb_process.c:193
Message-ID:  <bug-222624-17-gh9YS1EpCR@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-222624-17@https.bugs.freebsd.org/bugzilla/>
References:  <bug-222624-17@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D222624

Hans Petter Selasky <hselasky@FreeBSD.org> changed:

           What    |Removed                     |Added
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                 CC|                            |mjg@FreeBSD.org

--- Comment #13 from Hans Petter Selasky <hselasky@FreeBSD.org> ---
Do you have a core dump of the last crash?

Can you run gdb:

gdb
file /boot/kernel/ehci.ko
info line *(void *)(ehci_check_transfer+0x94)

In my system this leads to the xfer->td_transfer_cache is NULL.
This variable should not be NULL during regular usage. This might be an
indication of another memory problem or maybe a mutex issue.

It would be interesting to dump some structures to see if their contents is
valid.

--HPS

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