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From: Gerd Hoffmann <kraxel@redhat.com>
Date: Tue, 17 Mar 2015 12:58:57 +0100
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Subject: Re: [Qemu-devel] [PATCH] usb: fix segfault when hot-unplugging usb
	host adapter
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To: arei.gonglei@huawei.com
Cc: qemu-stable <qemu-stable@nongnu.org>, qemu-devel@nongnu.org, peter.huangpeng@huawei.com

> +    qemu_unregister_reset(ehci_reset, s);

We should hook up reset via DeviceClass->reset then (xhci already does
it this way) and drop the qemu_register_reset() calls.

Then qemu will register and unregister the reset handler automatically
for us.

cheers,
  Gerd