MIPS: Fix poweroff failure when HOTPLUG_CPU configured.
authorHuacai Chen <chenhc@lemote.com>
Mon, 13 Aug 2012 12:52:24 +0000 (20:52 +0800)
committerBen Hutchings <ben@decadent.org.uk>
Thu, 3 Jan 2013 03:33:40 +0000 (03:33 +0000)
commitdd24f9ce652b321ce1c25182bca37feb813c7ee8
tree53e82a22de6b42edaee327811e58596b310dbc58
parent8c1792be40e41e2ca4102fe003c46650cd4dab4a
MIPS: Fix poweroff failure when HOTPLUG_CPU configured.

commit 8add1ecb81f541ef2fcb0b85a5470ad9ecfb4a84 upstream.

When poweroff machine, kernel_power_off() call disable_nonboot_cpus().
And if we have HOTPLUG_CPU configured, disable_nonboot_cpus() is not an
empty function but attempt to actually disable the nonboot cpus. Since
system state is SYSTEM_POWER_OFF, play_dead() won't be called and thus
disable_nonboot_cpus() hangs. Therefore, we make this patch to avoid
poweroff failure.

Signed-off-by: Huacai Chen <chenhc@lemote.com>
Signed-off-by: Hongliang Tao <taohl@lemote.com>
Signed-off-by: Hua Yan <yanh@lemote.com>
Cc: Yong Zhang <yong.zhang@windriver.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: Fuxin Zhang <zhangfx@lemote.com>
Cc: Zhangjin Wu <wuzhangjin@gmail.com>
Patchwork: https://patchwork.linux-mips.org/patch/4211/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
arch/mips/kernel/process.c