From f740e6c9c55cac6ab0a7d44a464b54467cca4f4f Mon Sep 17 00:00:00 2001 From: Kenji Kaneshige Date: Wed, 22 Aug 2007 19:53:30 +0900 Subject: [PATCH] [IA64] Clear pending interrupts at CPU boot up time The pending interrupts can be remaining at boot up time on some platform. This will cause spurious interrupts when interrupt is enabled for the first time. This patch clears IVR at the CPU initialization to eliminate such spurious interrupts. Signed-off-by: Kenji Kaneshige Signed-off-by: Tony Luck --- arch/ia64/kernel/setup.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/ia64/kernel/setup.c b/arch/ia64/kernel/setup.c index 407efea04bf5..1f9b1d818dcd 100644 --- a/arch/ia64/kernel/setup.c +++ b/arch/ia64/kernel/setup.c @@ -960,6 +960,11 @@ cpu_init (void) /* clear TPR & XTP to enable all interrupt classes: */ ia64_setreg(_IA64_REG_CR_TPR, 0); + + /* Clear any pending interrupts left by SAL/EFI */ + while (ia64_get_ivr() != IA64_SPURIOUS_INT_VECTOR) + ia64_eoi(); + #ifdef CONFIG_SMP normal_xtp(); #endif -- 2.39.5