diff options
| author | Nathan Fontenot <nfont@linux.vnet.ibm.com> | 2018-01-10 10:40:09 -0600 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-01-11 11:32:25 -0500 |
| commit | 09fb35ead58cd557aa9b20576d15816bc91a4deb (patch) | |
| tree | cd36667bfb63546bb271f8f02b84b35be34c2e4a | |
| parent | 4621ffd604f935bd3c5d989364ef586c5ff79c98 (diff) | |
| download | linux-09fb35ead58cd557aa9b20576d15816bc91a4deb.tar.bz2 | |
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>
| -rw-r--r-- | drivers/net/ethernet/ibm/ibmvnic.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c index 6911b7cc06c5..461014b7ccdd 100644 --- a/drivers/net/ethernet/ibm/ibmvnic.c +++ b/drivers/net/ethernet/ibm/ibmvnic.c @@ -2453,6 +2453,12 @@ static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance) struct ibmvnic_sub_crq_queue *scrq = instance; struct ibmvnic_adapter *adapter = scrq->adapter; + /* When booting a kdump kernel we can hit pending interrupts + * prior to completing driver initialization. + */ + if (unlikely(adapter->state != VNIC_OPEN)) + return IRQ_NONE; + adapter->rx_stats_buffers[scrq->scrq_num].interrupts++; if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) { |