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powerpc: Fix missing/delayed calls to irq_work
When replaying interrupts (as a result of the interrupt occurring while soft-disabled), in the case of the decrementer, we are exclusively testing for a pending timer target. However we also use decrementer interrupts to trigger the new "irq_work", which in this case would be missed. This change the logic to force a replay in both cases of a timer boundary reached and a decrementer interrupt having actually occurred while disabled. The former test is still useful to catch cases where a CPU having been hard-disabled for a long time completely misses the interrupt due to a decrementer rollover. CC: <stable@vger.kernel.org> [v3.4+] Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Tested-by: Steven Rostedt <rostedt@goodmis.org>
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@ -162,7 +162,7 @@ notrace unsigned int __check_irq_replay(void)
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* in case we also had a rollover while hard disabled
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* in case we also had a rollover while hard disabled
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*/
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*/
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local_paca->irq_happened &= ~PACA_IRQ_DEC;
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local_paca->irq_happened &= ~PACA_IRQ_DEC;
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if (decrementer_check_overflow())
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if ((happened & PACA_IRQ_DEC) || decrementer_check_overflow())
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return 0x900;
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return 0x900;
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/* Finally check if an external interrupt happened */
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/* Finally check if an external interrupt happened */
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