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From:   Shunsuke Mie <mie@igel.co.jp>
To:     Zhu Yanjun <zyjzyj2000@gmail.com>
Cc:     Shunsuke Mie <mie@igel.co.jp>,
        =?UTF-8?q?Christian=20K=C3=B6nig?= <christian.koenig@amd.com>,
        Alex Deucher <alexander.deucher@amd.com>,
        Daniel Vetter <daniel.vetter@ffwll.ch>,
        Doug Ledford <dledford@redhat.com>,
        Jason Gunthorpe <jgg@ziepe.ca>,
        Jianxin Xiong <jianxin.xiong@intel.com>,
        Leon Romanovsky <leon@kernel.org>,
        linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org,
        dhobsong@igel.co.jp, taki@igel.co.jp, etom@igel.co.jp
Subject: [RFC PATCH 1/3] RDMA/umem: Change for rdma devices has not dma device
Date:   Wed,  8 Sep 2021 15:16:09 +0900
Message-Id: <20210908061611.69823-2-mie@igel.co.jp>
In-Reply-To: <20210908061611.69823-1-mie@igel.co.jp>
References: <20210908061611.69823-1-mie@igel.co.jp>
Precedence: bulk

To share memory space using dma-buf, a API of the dma-buf requires dma
device, but devices such as rxe do not have a dma device. For those case,
change to specify a device of struct ib instead of the dma device.

Signed-off-by: Shunsuke Mie <mie@igel.co.jp>
---
 drivers/infiniband/core/umem_dmabuf.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/infiniband/core/umem_dmabuf.c b/drivers/infiniband/core/umem_dmabuf.c
index c6e875619fac..58d6ac9cb51a 100644
--- a/drivers/infiniband/core/umem_dmabuf.c
+++ b/drivers/infiniband/core/umem_dmabuf.c
@@ -146,7 +146,7 @@ struct ib_umem_dmabuf *ib_umem_dmabuf_get(struct ib_device *device,
 
 	umem_dmabuf->attach = dma_buf_dynamic_attach(
 					dmabuf,
-					device->dma_device,
+					device->dma_device ? device->dma_device : &device->dev,
 					ops,
 					umem_dmabuf);
 	if (IS_ERR(umem_dmabuf->attach)) {
-- 
2.17.1