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[IA64] Clear pending interrupts at CPU boot up time

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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 <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
This commit is contained in:
Kenji Kaneshige 2007-08-22 19:53:30 +09:00 committed by Tony Luck
parent 17764d2437
commit f740e6c9c5
1 changed files with 5 additions and 0 deletions
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5
arch/ia64/kernel/setup.c
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@ -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