disable kernel build waring

hc

2024-05-10 093a6c67005148ae32a5c9e4553491b9f5c2457b

 kernel/drivers/infiniband/ulp/rtrs/rtrs.c
..
..
@@ -37,8 +37,10 @@
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 			goto err;
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 		iu->dma_addr = ib_dma_map_single(dma_dev, iu->buf, size, dir);
40
-		if (ib_dma_mapping_error(dma_dev, iu->dma_addr))
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+		if (ib_dma_mapping_error(dma_dev, iu->dma_addr)) {
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+			kfree(iu->buf);
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 			goto err;
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+		}
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 		iu->cqe.done  = done;
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 		iu->size      = size;