IB/hifi1: add a null check of kzalloc_node in hfi1_ipoib_txreq_init

kzalloc_node may fails, check it and do the cleanup.

Fixes: b1151b74 ("IB/hfi1: Fix alloc failure with larger txqueuelen")
Signed-off-by: Kang Chen <void0red@gmail.com>
Link: https://lore.kernel.org/r/20230227100212.910820-1-void0red@gmail.comSigned-off-by: Leon Romanovsky <leon@kernel.org>

drivers/infiniband/hw/hfi1/ipoib_tx.c

@@ -737,10 +737,13 @@ int hfi1_ipoib_txreq_init(struct hfi1_ipoib_dev_priv *priv)
 		txq->tx_ring.shift = ilog2(tx_item_size);
 		txq->tx_ring.avail = hfi1_ipoib_ring_hwat(txq);
 		tx_ring = &txq->tx_ring;
-		for (j = 0; j < tx_ring_size; j++)
+		for (j = 0; j < tx_ring_size; j++) {
 			hfi1_txreq_from_idx(tx_ring, j)->sdma_hdr =
 				kzalloc_node(sizeof(*tx->sdma_hdr),
 					     GFP_KERNEL, priv->dd->node);
+			if (!hfi1_txreq_from_idx(tx_ring, j)->sdma_hdr)
+				goto free_txqs;
+		}
 
 		netif_napi_add_tx(dev, &txq->napi, hfi1_ipoib_poll_tx_ring);
 	}