diff options
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/kernel/exceptions-64s.S | 19 | ||||
| -rw-r--r-- | arch/powerpc/kernel/irq.c | 13 |
2 files changed, 13 insertions, 19 deletions
diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S index 18bbce143084..728ccb0f560c 100644 --- a/arch/powerpc/kernel/exceptions-64s.S +++ b/arch/powerpc/kernel/exceptions-64s.S @@ -3121,22 +3121,3 @@ handle_dabr_fault: li r5,SIGSEGV bl bad_page_fault b interrupt_return - -/* - * When doorbell is triggered from system reset wakeup, the message is - * not cleared, so it would fire again when EE is enabled. - * - * When coming from local_irq_enable, there may be the same problem if - * we were hard disabled. - * - * Execute msgclr to clear pending exceptions before handling it. - */ -h_doorbell_common_msgclr: - LOAD_REG_IMMEDIATE(r3, PPC_DBELL_MSGTYPE << (63-36)) - PPC_MSGCLR(3) - b h_doorbell_common_virt - -doorbell_super_common_msgclr: - LOAD_REG_IMMEDIATE(r3, PPC_DBELL_MSGTYPE << (63-36)) - PPC_MSGCLRP(3) - b doorbell_super_common_virt 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 |