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From: Jia-Shiun Li <jiashiun@gmail.com>
Date: Wed, 24 Jul 2013 22:26:08 +0800
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Subject: Re: Panic at USB drive plugging in
To: Alexander Motin <mav@freebsd.org>
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Cc: Hans Petter Selasky <hps@bitfrost.no>, freebsd-current@freebsd.org
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On Wed, Jul 24, 2013 at 4:02 AM, Alexander Motin <mav@freebsd.org> wrote:
> cam.k kernel module includes all existing periph drivers in one bundle.
> Loading cam.ko you are probably getting sg driver also, that triggers
> reported issue. You may try to rip out sg with single line hack to module's
> Makefile. The real fix require looking closer on sg, which I never used.
>

Indeed. Test result did confirm that if sg is not included in cam.ko
USB drives will not cause kernel to panic.

Jia-Shiun.