From: Hugh Daschbach <hdasch@broadcom.com>
Date: Mon, 22 Mar 2010 17:36:37 +0000 (-0700)
Subject: Driver core: Protect device shutdown from hot unplug events.
X-Git-Tag: v2.6.35-rc1~459^2~22
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6245838fe4d2ce4aab52f543224f7d1212d9155c;p=pandora-kernel.git

Driver core: Protect device shutdown from hot unplug events.

While device_shutdown() walks through devices_kset to shutdown all
devices, device unplug events may race to shutdown individual devices.
Specifically, sd_shutdown(), on behalf of fc_starget_delete(), has
been observed deleting devices during device_shutdown()'s list
traversal.  So we factor out list_for_each_entry_safe_reverse(...) in
favor of while (!list_empty(...)).

Signed-off-by: Hugh Daschbach <hdasch@broadcom.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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