[PATCH for-next] RDMA/core: Fix user CQ creation for drivers without create_cq

[PATCH for-next] RDMA/core: Fix user CQ creation for drivers without create_cq

[Michael Margolin]

CQ creation is failing for drivers that only implement create_user_cq
(e.g. EFA), when buffer isn't provided by userspace. This because of a
leftover check that requires create_cq existence in such case.

Remove the create_cq existence check from the no-buffer path. The
buffer is optional and drivers that handle their own memory should work
through create_user_cq regardless.

Fixes: 584ec74748e6 ("RDMA/core: Prepare create CQ path for API unification")
Signed-off-by: Michael Margolin <mrgolin@amazon.com>
---
 drivers/infiniband/core/uverbs_std_types_cq.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/infiniband/core/uverbs_std_types_cq.c b/drivers/infiniband/core/uverbs_std_types_cq.c
index d2c8f71f934c..79b51f60ce2a 100644
--- a/drivers/infiniband/core/uverbs_std_types_cq.c
+++ b/drivers/infiniband/core/uverbs_std_types_cq.c
@@ -172,8 +172,7 @@ static int UVERBS_HANDLER(UVERBS_METHOD_CQ_CREATE)(
 		}
 		umem = &umem_dmabuf->umem;
 	} else if (uverbs_attr_is_valid(attrs, UVERBS_ATTR_CREATE_CQ_BUFFER_OFFSET) ||
-		   uverbs_attr_is_valid(attrs, UVERBS_ATTR_CREATE_CQ_BUFFER_LENGTH) ||
-		   !ib_dev->ops.create_cq) {
+		   uverbs_attr_is_valid(attrs, UVERBS_ATTR_CREATE_CQ_BUFFER_LENGTH)) {
 		ret = -EINVAL;
 		goto err_event_file;
 	}
-- 
2.47.3