change otg to host mode

hc

2024-05-11 04dd17822334871b23ea2862f7798fb0e0007777

 kernel/net/9p/trans_rdma.c
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@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * linux/fs/9p/trans_rdma.c
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  *
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@@ -8,22 +9,6 @@
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  *  Copyright (C) 2004-2005 by Latchesar Ionkov <lucho@ionkov.net>
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  *  Copyright (C) 2004-2008 by Eric Van Hensbergen <ericvh@gmail.com>
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  *  Copyright (C) 1997-2002 by Ron Minnich <rminnich@sarnoff.com>
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- *
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- *  This program is free software; you can redistribute it and/or modify
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- *  it under the terms of the GNU General Public License version 2
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- *  as published by the Free Software Foundation.
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- *
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- *  This program is distributed in the hope that it will be useful,
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- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
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- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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- *  GNU General Public License for more details.
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- *
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- *  You should have received a copy of the GNU General Public License
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- *  along with this program; if not, write to:
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- *  Free Software Foundation
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- *  51 Franklin Street, Fifth Floor
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- *  Boston, MA  02111-1301  USA
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- *
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  */
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13
 
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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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@@ -109,14 +94,15 @@
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 	struct completion cm_done;
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 };
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+struct p9_rdma_req;
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+
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 /**
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- * p9_rdma_context - Keeps track of in-process WR
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+ * struct p9_rdma_context - Keeps track of in-process WR
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  *
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  * @busa: Bus address to unmap when the WR completes
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  * @req: Keeps track of requests (send)
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  * @rc: Keepts track of replies (receive)
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  */
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-struct p9_rdma_req;
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 struct p9_rdma_context {
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 	struct ib_cqe cqe;
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 	dma_addr_t busa;
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@@ -127,7 +113,7 @@
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 };
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 /**
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- * p9_rdma_opts - Collection of mount options
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+ * struct p9_rdma_opts - Collection of mount options
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  * @port: port of connection
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  * @sq_depth: The requested depth of the SQ. This really doesn't need
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  * to be any deeper than the number of threads used in the client
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@@ -400,6 +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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@@ -417,7 +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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@@ -514,7 +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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@@ -524,11 +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;
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@@ -700,9 +695,9 @@
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 		goto error;
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 	/* Create the Completion Queue */
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-	rdma->cq = ib_alloc_cq(rdma->cm_id->device, client,
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-			opts.sq_depth + opts.rq_depth + 1,
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-			0, IB_POLL_SOFTIRQ);
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+	rdma->cq = ib_alloc_cq_any(rdma->cm_id->device, client,
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+				   opts.sq_depth + opts.rq_depth + 1,
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+				   IB_POLL_SOFTIRQ);
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 	if (IS_ERR(rdma->cq))
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 		goto error;
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