CMDQ may fail during HNS ROCEE initialization. The following is the log
when the execution fails:

  hns3 0000:bd:00.2: In reset process RoCE client reinit.
  hns3 0000:bd:00.2: CMDQ move tail from 840 to 839
  hns3 0000:bd:00.2 hns_2: failed to set gid, ret = -11!
  hns3 0000:bd:00.2: CMDQ move tail from 840 to 839
  <...>
  hns3 0000:bd:00.2: CMDQ move tail from 840 to 839
  hns3 0000:bd:00.2: CMDQ move tail from 840 to 0
  hns3 0000:bd:00.2: [cmd]token 14e mailbox 20 timeout.
  hns3 0000:bd:00.2 hns_2: set HEM step 0 failed!
  hns3 0000:bd:00.2 hns_2: set HEM address to HW failed!
  hns3 0000:bd:00.2 hns_2: failed to alloc mtpt, ret = -16.
  infiniband hns_2: Couldn't create ib_mad PD
  infiniband hns_2: Couldn't open port 1
  hns3 0000:bd:00.2: Reset done, RoCE client reinit finished.

However, even if ib_mad client registration failed, ib_register_device()
still returns success to the driver.

In the device initialization process, CMDQ execution fails because HW/FW
is abnormal. Therefore, if CMDQ fails, the initialization function should
set CMDQ to a fatal error state and return a failure to the caller.

Fixes: 9a443537 ("IB/hns: Add driver files for hns RoCE driver")
Link: https://lore.kernel.org/r/20220429093104.26687-1-liangwenpeng@huawei.comSigned-off-by: Yangyang Li <liyangyang20@huawei.com>
Signed-off-by: Wenpeng Liang <liangwenpeng@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>