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@xxxxxxxxxxxxxx> --- arch/ia64/kernel/setup.c | 5 +++++ 1 files changed, 5 insertions(+) Index: linux-2.6.23-rc3/arch/ia64/kernel/setup.c =================================================================== --- linux-2.6.23-rc3.orig/arch/ia64/kernel/setup.c +++ linux-2.6.23-rc3/arch/ia64/kernel/setup.c @@ -953,6 +953,11 @@ 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 - To unsubscribe from this list: send the line "unsubscribe linux-ia64" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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