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hc

2024-02-19 1c055e55a242a33e574e48be530e06770a210dcd

 kernel/net/9p/trans_rdma.c
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@@ -386,6 +386,7 @@
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 	struct p9_trans_rdma *rdma = client->trans;
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 	struct ib_recv_wr wr;
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 	struct ib_sge sge;
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+	int ret;
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 	c->busa = ib_dma_map_single(rdma->cm_id->device,
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 				    c->rc.sdata, client->msize,
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@@ -403,7 +404,12 @@
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 	wr.wr_cqe = &c->cqe;
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 	wr.sg_list = &sge;
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 	wr.num_sge = 1;
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-	return ib_post_recv(rdma->qp, &wr, NULL);
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+
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+	ret = ib_post_recv(rdma->qp, &wr, NULL);
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+	if (ret)
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+		ib_dma_unmap_single(rdma->cm_id->device, c->busa,
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+				    client->msize, DMA_FROM_DEVICE);
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+	return ret;
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  error:
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 	p9_debug(P9_DEBUG_ERROR, "EIO\n");
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@@ -500,7 +506,7 @@
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 	if (down_interruptible(&rdma->sq_sem)) {
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 		err = -EINTR;
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-		goto send_error;
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+		goto dma_unmap;
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 	}
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 	/* Mark request as `sent' *before* we actually send it,
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@@ -510,11 +516,14 @@
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 	req->status = REQ_STATUS_SENT;
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 	err = ib_post_send(rdma->qp, &wr, NULL);
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 	if (err)
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-		goto send_error;
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+		goto dma_unmap;
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 	/* Success */
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 	return 0;
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+dma_unmap:
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+	ib_dma_unmap_single(rdma->cm_id->device, c->busa,
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+			    c->req->tc.size, DMA_TO_DEVICE);
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  /* Handle errors that happened during or while preparing the send: */
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  send_error:
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 	req->status = REQ_STATUS_ERROR;