diff options
author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2013-06-15 12:13:40 +1000 |
---|---|---|
committer | Xavier Boudet <x-boudet@ti.com> | 2013-07-02 08:28:40 +0200 |
commit | b5de64a0478ae0eb3f940d4ddc0a5dad0fa264a8 (patch) | |
tree | 2a8d5420a6a248a692248e6a0d2ec595e4384a6a /arch | |
parent | c912c48a3102b7f7ab53f6068833d2a648ae3a22 (diff) |
powerpc: Fix missing/delayed calls to irq_work
commit 230b3034793247f61e6a0b08c44cf415f6d92981 upstream.
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.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Tested-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch')
-rw-r--r-- | arch/powerpc/kernel/irq.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c index d7ebc58c907b..071592bbe025 100644 --- a/arch/powerpc/kernel/irq.c +++ b/arch/powerpc/kernel/irq.c @@ -162,7 +162,7 @@ notrace unsigned int __check_irq_replay(void) * in case we also had a rollover while hard disabled */ local_paca->irq_happened &= ~PACA_IRQ_DEC; - if (decrementer_check_overflow()) + if ((happened & PACA_IRQ_DEC) || decrementer_check_overflow()) return 0x900; /* Finally check if an external interrupt happened */ |