Commit 8520e443 authored by Phileas Fogg's avatar Phileas Fogg Committed by Benjamin Herrenschmidt

powerpc/kexec: Disable hard IRQ before kexec

Disable hard IRQ before kexec a new kernel image.
Not doing it can result in corrupted data in the memory segments
reserved for the new kernel.
Signed-off-by: default avatarPhileas Fogg <phileas-fogg@mail.ru>
CC: <stable@vger.kernel.org>
Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
parent dffff02a
......@@ -162,6 +162,8 @@ static int kexec_all_irq_disabled = 0;
static void kexec_smp_down(void *arg)
{
local_irq_disable();
hard_irq_disable();
mb(); /* make sure our irqs are disabled before we say they are */
get_paca()->kexec_state = KEXEC_STATE_IRQS_OFF;
while(kexec_all_irq_disabled == 0)
......@@ -244,6 +246,8 @@ static void kexec_prepare_cpus(void)
wake_offline_cpus();
smp_call_function(kexec_smp_down, NULL, /* wait */0);
local_irq_disable();
hard_irq_disable();
mb(); /* make sure IRQs are disabled before we say they are */
get_paca()->kexec_state = KEXEC_STATE_IRQS_OFF;
......@@ -281,6 +285,7 @@ static void kexec_prepare_cpus(void)
if (ppc_md.kexec_cpu_down)
ppc_md.kexec_cpu_down(0, 0);
local_irq_disable();
hard_irq_disable();
}
#endif /* SMP */
......
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