[SPDK] Helloworld program fails during device initialization.

[Sreeni (Sreenivasa) Busam (Stellus) <s.busam at stellus.com>]

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I was testing the helloworld program on ubuntu with NVMe SSD and the probe() is failing. Please let me know if this is a known problem.
Let me know if there is workaround.
The perf program did not have any problem.
I have attached the output for both tests.
lspci| grep Non
ad:00.0 Non-Volatile memory controller: Samsung Electronics Co Ltd NVMe SSD Controller (rev 01)
ae:00.0 Non-Volatile memory controller: Samsung Electronics Co Ltd NVMe SSD Controller (rev 01)
uname -a
Linux sjca5radevct13 4.10.0-38-generic #42~16.04.1-Ubuntu SMP Tue Oct 10 16:32:20 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
1. helloworld output:
---------------------------
Attached to 0000:ad:00.0
Using controller SAMSUNG MZQWV480HCGM (S1TRNYAFA00148      ) with 1 namespaces.
  Namespace ID: 1 size: 480GB
nvme_ctrlr.c:1475:nvme_ctrlr_process_init: *ERROR*: Initialization timed out in state 1
nvme_ctrlr.c: 523:nvme_ctrlr_shutdown: *ERROR*: did not shutdown within 5 seconds
spdk_nvme_probe() failed

2. perf output:
sudo ./perf -q 1 -s 4096 -t 10 -w read -r "trtype:PCIe traddr:0000:ad:00.0"
---------------
Starting DPDK 17.08.0 initialization...
[ DPDK EAL parameters: perf -c 0x1 --file-prefix=spdk_pid7647 ]
EAL: Detected 32 lcore(s)
EAL: No free hugepages reported in hugepages-1048576kB
Attached to NVMe Controller at 0000:ad:00.0 [144d:a802]
Associating SAMSUNG MZQWV480HCGM (S1TRNYAFA00148      ) with lcore 0
Initialization complete. Launching workers.
Starting thread on core 0
========================================================
                                                                                            Latency(us)
Device Information                                     :       IOPS       MB/s    Average        min        max
SAMSUNG MZQWV480HCGM (S1TRNYAFA00148      ) from core 0:   13773.50      53.80      72.59      60.20     243.82
========================================================
Total                                                  :   13773.50      53.80      72.59      60.20     243.82

Thanks for your help,
Sreeni

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