RDMA/hns: Fix incorrect post-send with direct wqe of wr-list in kernel space

driver inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I7A2SA



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Currently, direct wqe is not supported for wr-list. RoCE driver excludes
direct wqe for wr-list by judging whether the number of wr is 1.

For a wr-list where the second wr is a length-error atomic wr, the
post-send driver handles the first wr and adds 1 to the wr number counter
firstly. While handling the second wr, the driver finds out a length error
and terminates the wr handle process, remaining the counter at 1. This
causes the driver mistakenly judges there is only 1 wr and thus enters
the direct wqe process, carrying the current length-error atomic wqe.

This patch fixes the error by adding a judgement whether the current wr
is a bad wr. If so, use the normal doorbell process but not direct wqe
despite the wr number is 1.

Fixes: a77e1f87 ("RDMA/hns: Remove the condition of light load for posting DWQE")
Signed-off-by: Junxian Huang <huangjunxian6@hisilicon.com>