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-rw-r--r--arch/powerpc/kernel/irq.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
index a25ed47087ee..1f1169856dc8 100644
--- a/arch/powerpc/kernel/irq.c
+++ b/arch/powerpc/kernel/irq.c
@@ -527,6 +527,19 @@ void irq_set_pending_from_srr1(unsigned long srr1)
return;
}
+ if (reason == PACA_IRQ_DBELL) {
+ /*
+ * When doorbell triggers a system reset wakeup, the message
+ * is not cleared, so if the doorbell interrupt is replayed
+ * and the IPI handled, the doorbell interrupt would still
+ * fire when EE is enabled.
+ *
+ * To avoid taking the superfluous doorbell interrupt,
+ * execute a msgclr here before the interrupt is replayed.
+ */
+ ppc_msgclr(PPC_DBELL_MSGTYPE);
+ }
+
/*
* The 0 index (SRR1[42:45]=b0000) must always evaluate to 0,
* so this can be called unconditionally with the SRR1 wake