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Date: Thu, 11 Nov 2010 15:50:50 +0000 From: Alan Cox <alan@...rguk.ukuu.org.uk> To: x86@...nel.org, linux-kernel@...r.kernel.org Subject: [PATCH] x86/mrst: set vRTC's IRQ to level trigger type From: Feng Tang <feng.tang@...el.com> When setting up the mpc_intsrc structure for vRTC's IRQ, we need to set its irqflag to level trigger, otherwise it will be taken as edge triggered and the vRTC IRQ will fire only once, as there is never a EOI issued from the IA core for it. The original code worked in previous kernel. This is because it was configured to level trigger type by luck. It fell into the default PCI trigger category which is level triggered. Signed-off-by: Feng Tang <feng.tang@...el.com> Signed-off-by: Alan Cox <alan@...ux.intel.com> --- arch/x86/platform/mrst/mrst.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/arch/x86/platform/mrst/mrst.c b/arch/x86/platform/mrst/mrst.c index f2bc945..9ad8f57 100644 --- a/arch/x86/platform/mrst/mrst.c +++ b/arch/x86/platform/mrst/mrst.c @@ -195,7 +195,7 @@ int __init sfi_parse_mrtc(struct sfi_table_header *table) totallen, (u32)pentry->phys_addr, pentry->irq); mp_irq.type = MP_IOAPIC; mp_irq.irqtype = mp_INT; - mp_irq.irqflag = 0; + mp_irq.irqflag = 0xf; /* level trigger and active low */ mp_irq.srcbus = 0; mp_irq.srcbusirq = pentry->irq; /* IRQ */ mp_irq.dstapic = MP_APIC_ALL; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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