From: Denis V. Lunev <den@openvz.org>
Date: Tue, 7 Aug 2007 09:13:18 +0000 (+0400)
Subject: PCI: pci_get_device call from interrupt in reboot fixups
X-Git-Tag: v2.6.24-rc1~1393^2~22
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3d034aecd8b70d34388a4e40ca50af0d014223e1;p=pandora-kernel.git

PCI: pci_get_device call from interrupt in reboot fixups

The following calltrace is possible now:
 handle_sysrq
   machine_emergency_restart
     mach_reboot_fixups
       pci_get_device
         pci_get_subsys
	   down_read
The patch skips reboot fixup if called from sysrq-B code.

Signed-off-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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