RDMA/vmw_pvrdma: Fix usage of user response structures in ABI file
This ensures that we return the right structures back to userspace.
Otherwise, it looks like the reserved fields in the response structures
in userspace might have uninitialized data in them.
Fixes: 8b10ba783c9d ("RDMA/vmw_pvrdma: Add shared receive queue support")
Fixes: 29c8d9eba550 ("IB: Add vmw_pvrdma driver")
Suggested-by: Jason Gunthorpe <jgg@mellanox.com>
Reviewed-by: Bryan Tan <bryantan@vmware.com>
Reviewed-by: Aditya Sarwade <asarwade@vmware.com>
Reviewed-by: Jorgen Hansen <jhansen@vmware.com>
Signed-off-by: Adit Ranadive <aditr@vmware.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
diff --git a/drivers/infiniband/hw/vmw_pvrdma/pvrdma_cq.c b/drivers/infiniband/hw/vmw_pvrdma/pvrdma_cq.c
index faa9478..f95b976 100644
--- a/drivers/infiniband/hw/vmw_pvrdma/pvrdma_cq.c
+++ b/drivers/infiniband/hw/vmw_pvrdma/pvrdma_cq.c
@@ -114,6 +114,7 @@ struct ib_cq *pvrdma_create_cq(struct ib_device *ibdev,
union pvrdma_cmd_resp rsp;
struct pvrdma_cmd_create_cq *cmd = &req.create_cq;
struct pvrdma_cmd_create_cq_resp *resp = &rsp.create_cq_resp;
+ struct pvrdma_create_cq_resp cq_resp = {0};
struct pvrdma_create_cq ucmd;
BUILD_BUG_ON(sizeof(struct pvrdma_cqe) != 64);
@@ -197,6 +198,7 @@ struct ib_cq *pvrdma_create_cq(struct ib_device *ibdev,
cq->ibcq.cqe = resp->cqe;
cq->cq_handle = resp->cq_handle;
+ cq_resp.cqn = resp->cq_handle;
spin_lock_irqsave(&dev->cq_tbl_lock, flags);
dev->cq_tbl[cq->cq_handle % dev->dsr->caps.max_cq] = cq;
spin_unlock_irqrestore(&dev->cq_tbl_lock, flags);
@@ -205,7 +207,7 @@ struct ib_cq *pvrdma_create_cq(struct ib_device *ibdev,
cq->uar = &(to_vucontext(context)->uar);
/* Copy udata back. */
- if (ib_copy_to_udata(udata, &cq->cq_handle, sizeof(__u32))) {
+ if (ib_copy_to_udata(udata, &cq_resp, sizeof(cq_resp))) {
dev_warn(&dev->pdev->dev,
"failed to copy back udata\n");
pvrdma_destroy_cq(&cq->ibcq);