SPEFloatingPointException() is the only exception handler which 'forgets' to
re-enable interrupts. This patch makes sure it does.
Suggested-by: Benjamin Herrenschmidt <b...@kernel.crashing.org>
Signed-off-by: Christophe Leroy <christophe.le...@c-s.fr>
---
arch/powerpc/kernel/traps.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index 040b60293613..ea552793fe44 100644
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
@@ -1997,6 +1997,10 @@ void SPEFloatingPointException(struct pt_regs *regs)
int code = FPE_FLTUNK;
int err;
+ /* We restore the interrupt state now */
+ if (!arch_irq_disabled_regs(regs))
+ local_irq_enable();
+
flush_spe_to_thread(current);
spefscr = current->thread.spefscr;
@@ -2042,6 +2046,10 @@ void SPEFloatingPointRoundException(struct pt_regs *regs)
extern int speround_handler(struct pt_regs *regs);
int err;
+ /* We restore the interrupt state now */
+ if (!arch_irq_disabled_regs(regs))
+ local_irq_enable();
+
preempt_disable();
if (regs->msr & MSR_SPE)
giveup_spe(current);
--
2.13.3
