ibmvnic: Don't handle RX interrupts when not up.
Initiating a kdump via the command line can cause a pending interrupt to be handled by the ibmvnic driver when initializing the sub-CRQ irqs during driver initialization. NIP [d000000000ca34f0] ibmvnic_interrupt_rx+0x40/0xd0 [ibmvnic] LR [c000000008132ef0] __handle_irq_event_percpu+0xa0/0x2f0 Call Trace: [c000000047fcfde0] [c000000008132ef0] __handle_irq_event_percpu+0xa0/0x2f0 [c000000047fcfea0] [c00000000813317c] handle_irq_event_percpu+0x3c/0x90 [c000000047fcfee0] [c00000000813323c] handle_irq_event+0x6c/0xd0 [c000000047fcff10] [c0000000081385e0] handle_fasteoi_irq+0xf0/0x250 [c000000047fcff40] [c0000000081320a0] generic_handle_irq+0x50/0x80 [c000000047fcff60] [c000000008014984] __do_irq+0x84/0x1d0 [c000000047fcff90] [c000000008027564] call_do_irq+0x14/0x24 [c00000003c92af00] [c000000008014b70] do_IRQ+0xa0/0x120 [c00000003c92af50] [c000000008002594] hardware_interrupt_common+0x114/0x180 Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -2453,6 +2453,12 @@ static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
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struct ibmvnic_sub_crq_queue *scrq = instance;
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struct ibmvnic_adapter *adapter = scrq->adapter;
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/* When booting a kdump kernel we can hit pending interrupts
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* prior to completing driver initialization.
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*/
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if (unlikely(adapter->state != VNIC_OPEN))
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return IRQ_NONE;
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adapter->rx_stats_buffers[scrq->scrq_num].interrupts++;
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if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
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