diff options
| author | Keith Busch <keith.busch@intel.com> | 2018-10-31 13:15:29 -0600 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2018-11-02 08:14:46 -0600 |
| commit | 9fe5c59ff6a1e5e26a39b75489a1420e7eaaf0b1 (patch) | |
| tree | 4e5a5edf35e507d531ee778d75930e51df696b59 /mm/page_io.c | |
| parent | d19b8bc82fc232d17ec45ca148388e4ba05ac4b9 (diff) | |
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>
Diffstat (limited to 'mm/page_io.c')
0 files changed, 0 insertions, 0 deletions