RDMA/rxe: Generate a completion for unsupported/invalid opcode

stable inclusion
from stable-v5.10.121
commit bb55ca1612923b06c4d86ab28b8dd8fdca55ced1
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I5L6CQ

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=bb55ca1612923b06c4d86ab28b8dd8fdca55ced1

--------------------------------

commit 2f917af7 upstream.

Current rxe_requester() doesn't generate a completion when processing an
unsupported/invalid opcode. If rxe driver doesn't support a new opcode
(e.g. RDMA Atomic Write) and RDMA library supports it, an application
using the new opcode can reproduce this issue. Fix the issue by calling
"goto err;".

Fixes: 8700e3e7 ("Soft RoCE driver")
Link: https://lore.kernel.org/r/20220410113513.27537-1-yangx.jy@fujitsu.comSigned-off-by: NXiao Yang <yangx.jy@fujitsu.com>
Signed-off-by: NJason Gunthorpe <jgg@nvidia.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>
Acked-by: NXie XiuQi <xiexiuqi@huawei.com>

drivers/infiniband/sw/rxe/rxe_req.c

@@ -650,7 +650,7 @@ int rxe_requester(void *arg)
 	opcode = next_opcode(qp, wqe, wqe->wr.opcode);
 	if (unlikely(opcode < 0)) {
 		wqe->status = IB_WC_LOC_QP_OP_ERR;
-		goto exit;
+		goto err;
 	}
 
 	mask = rxe_opcode[opcode].mask;