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

mainline inclusion
from mainline-v6.6-rc1
commit 706efac4
category: bugfix
bugzilla: https://gitee.com/lujunhuaHW/kernel_1/issues/I828SY
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=706efac4477cdb8be857f6322457de524acc02ff



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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: 01584a5e ("RDMA/hns: Add support of direct wqe")
Signed-off-by: Junxian Huang <huangjunxian6@hisilicon.com>
Link: https://lore.kernel.org/r/20230804012711.808069-3-huangjunxian6@hisilicon.com


Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Juan Zhou <zhoujuan51@h-partners.com>