RDMA/hns: Add vendor_err info to error WC

mainline inclusion
from mainline-v5.12-rc1
commit d5d182ea
category: bugfix
bugzilla: 174002
CVE:NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d5d182ea5aa2ae3cb20f98dddcfeaf263b802c07

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ULP can get more error information of CQ through verbs instead of prints.

Link: https://lore.kernel.org/r/1624362836-11631-1-git-send-email-liweihang@huawei.comSigned-off-by: NLang Cheng <chenglang@huawei.com>
Signed-off-by: NWeihang Li <liweihang@huawei.com>
Signed-off-by: NJason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Nwangsirong <wangsirong@huawei.com>
Reviewed-by: NChunZhi Hu <huchunzhi@huawei.com>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

drivers/infiniband/hw/hns/hns_roce_hw_v2.c

@@ -3506,6 +3506,7 @@ static void get_cqe_status(struct hns_roce_dev *hr_dev, struct hns_roce_qp *qp,
 	ibdev_err(&hr_dev->ib_dev, "error cqe status 0x%x:\n", cqe_status);
 	print_hex_dump(KERN_ERR, "", DUMP_PREFIX_NONE, 16, 4, cqe,
 		       cq->cqe_size, false);
+	wc->vendor_err = hr_reg_read(cqe, CQE_SUB_STATUS);
 
 	/*
 	 * For hns ROCEE, GENERAL_ERR is an error type that is not defined in