linux/drivers/nvme/host
Keith Busch 9fe5c59ff6 nvme-pci: fix conflicting p2p resource adds
The nvme pci driver had been adding its CMB resource to the P2P DMA
subsystem everytime on on a controller reset. This results in the
following warning:

    ------------[ cut here ]------------
    nvme 0000:00:03.0: Conflicting mapping in same section
    WARNING: CPU: 7 PID: 81 at kernel/memremap.c:155 devm_memremap_pages+0xa6/0x380
    ...
    Call Trace:
     pci_p2pdma_add_resource+0x153/0x370
     nvme_reset_work+0x28c/0x17b1 [nvme]
     ? add_timer+0x107/0x1e0
     ? dequeue_entity+0x81/0x660
     ? dequeue_entity+0x3b0/0x660
     ? pick_next_task_fair+0xaf/0x610
     ? __switch_to+0xbc/0x410
     process_one_work+0x1cf/0x350
     worker_thread+0x215/0x3d0
     ? process_one_work+0x350/0x350
     kthread+0x107/0x120
     ? kthread_park+0x80/0x80
     ret_from_fork+0x1f/0x30
    ---[ end trace f7ea76ac6ee72727 ]---
    nvme nvme0: failed to register the CMB

This patch fixes this by registering the CMB with P2P only once.

Signed-off-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-11-02 08:14:46 -06:00
..
Kconfig IB: Revert "remove redundant INFINIBAND kconfig dependencies" 2018-05-28 10:40:16 -06:00
Makefile nvme: Add fault injection feature 2018-03-26 08:53:43 -06:00
core.c pci-v4.20-changes 2018-10-25 06:50:48 -07:00
fabrics.c nvme-fabrics: move controller options matching to fabrics 2018-10-19 14:22:24 +02:00
fabrics.h nvme-fabrics: move controller options matching to fabrics 2018-10-19 14:22:24 +02:00
fault_inject.c nvme: Add fault injection feature 2018-03-26 08:53:43 -06:00
fc.c nvme-fc: fix request private initialization 2018-11-02 08:14:45 -06:00
lightnvm.c lightnvm: do no update csecs and sos on 1.2 2018-10-09 08:25:08 -06:00
multipath.c nvme: update node paths after adding new path 2018-10-17 08:58:22 +02:00
nvme.h pci-v4.20-changes 2018-10-25 06:50:48 -07:00
pci.c nvme-pci: fix conflicting p2p resource adds 2018-11-02 08:14:46 -06:00
rdma.c nvme-fabrics: move controller options matching to fabrics 2018-10-19 14:22:24 +02:00
trace.c nvme: add disk name to trace events 2018-07-24 15:55:48 +02:00
trace.h nvme-core: add async event trace helper 2018-10-01 14:16:12 -07:00