[PATCH RFC] RDMA/irdma: check vport device allocation

[Slavin Liu]

An existing RDMA function does not guarantee allocation of the new
vport device. Return -ENOMEM before initializing a NULL iwdev.

Detected by static analysis and reviewed with AI-assisted source auditing.

Fixes: 2ad49ae7330b ("RDMA/irdma: Introduce GEN3 vPort driver support")
Assisted-by: LLM
Signed-off-by: Slavin Liu <bolin.liu@xxxxxxxxxx>
---
 drivers/infiniband/hw/irdma/main.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/infiniband/hw/irdma/main.c b/drivers/infiniband/hw/irdma/main.c
index 95957d52883d..106915b51e7c 100644
--- a/drivers/infiniband/hw/irdma/main.c
+++ b/drivers/infiniband/hw/irdma/main.c
@@ -80,6 +80,8 @@ static int ig3rdma_vport_probe(struct auxiliary_device *aux_dev,
 		return -ENOMEM;
 	}
 	iwdev = ib_alloc_device(irdma_device, ibdev);
+	if (!iwdev)
+		return -ENOMEM;
 	/* Fill iwdev info */
 	iwdev->is_vport = true;
 	iwdev->rf = rf;