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| author | Li Zhong <zhong@linux.vnet.ibm.com> | 2014-04-28 08:29:51 +0800 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2014-04-28 13:08:47 +1000 |
| commit | 4fb8d027dca0236c811272d342cf185569d91311 (patch) | |
| tree | 8bdad33ed82cad9b0947a9974f1d6b694d721cfd /arch/powerpc/platforms/pseries/hotplug-cpu.c | |
| parent | 28ea3c7529388c1e4177336a0e655c6c7272fd1c (diff) | |
| download | linux-4fb8d027dca0236c811272d342cf185569d91311.tar.gz linux-4fb8d027dca0236c811272d342cf185569d91311.tar.bz2 linux-4fb8d027dca0236c811272d342cf185569d91311.zip | |
powerpc: Fix Oops in rtas_stop_self()
commit 41dd03a9 may cause Oops in rtas_stop_self().
The reason is that the rtas_args was moved into stack space. For a box
with more that 4GB RAM, the stack could easily be outside 32bit range,
but RTAS is 32bit.
So the patch moves rtas_args away from stack by adding static before
it.
Signed-off-by: Li Zhong <zhong@linux.vnet.ibm.com>
Signed-off-by: Anton Blanchard <anton@samba.org>
Cc: stable@vger.kernel.org # 3.14+
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/platforms/pseries/hotplug-cpu.c')
| -rw-r--r-- | arch/powerpc/platforms/pseries/hotplug-cpu.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/powerpc/platforms/pseries/hotplug-cpu.c b/arch/powerpc/platforms/pseries/hotplug-cpu.c index 9b8e05078a63..20d62975856f 100644 --- a/arch/powerpc/platforms/pseries/hotplug-cpu.c +++ b/arch/powerpc/platforms/pseries/hotplug-cpu.c @@ -88,13 +88,14 @@ void set_default_offline_state(int cpu) static void rtas_stop_self(void) { - struct rtas_args args = { - .token = cpu_to_be32(rtas_stop_self_token), + static struct rtas_args args = { .nargs = 0, .nret = 1, .rets = &args.args[0], }; + args.token = cpu_to_be32(rtas_stop_self_token); + local_irq_disable(); BUG_ON(rtas_stop_self_token == RTAS_UNKNOWN_SERVICE); |