diff options
| author | Zhengchao Shao <shaozhengchao@huawei.com> | 2023-01-04 10:04:24 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-03-11 16:44:12 +0100 |
| commit | 4b71f2b54332a4a08e40cca2e6d1d2b713039dea (patch) | |
| tree | 889ea5442ea862e5fb67efb2e1417396b0e48b44 /net | |
| parent | 7cc9dbae8a5f73bd555130384ea256018d28f283 (diff) | |
| download | linux-4b71f2b54332a4a08e40cca2e6d1d2b713039dea.tar.gz linux-4b71f2b54332a4a08e40cca2e6d1d2b713039dea.tar.bz2 linux-4b71f2b54332a4a08e40cca2e6d1d2b713039dea.zip | |
9p/rdma: unmap receive dma buffer in rdma_request()/post_recv()
[ Upstream commit 74a25e6e916cb57dab4267a96fbe8864ed21abdb ]
When down_interruptible() or ib_post_send() failed in rdma_request(),
receive dma buffer is not unmapped. Add unmap action to error path.
Also if ib_post_recv() failed in post_recv(), dma buffer is not unmapped.
Add unmap action to error path.
Link: https://lkml.kernel.org/r/20230104020424.611926-1-shaozhengchao@huawei.com
Fixes: fc79d4b104f0 ("9p: rdma: RDMA Transport Support for 9P")
Signed-off-by: Zhengchao Shao <shaozhengchao@huawei.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Dominique Martinet <asmadeus@codewreck.org>
Signed-off-by: Eric Van Hensbergen <ericvh@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/9p/trans_rdma.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/net/9p/trans_rdma.c b/net/9p/trans_rdma.c index b21c3c209815..c00e965c082b 100644 --- a/net/9p/trans_rdma.c +++ b/net/9p/trans_rdma.c @@ -385,6 +385,7 @@ post_recv(struct p9_client *client, struct p9_rdma_context *c) struct p9_trans_rdma *rdma = client->trans; struct ib_recv_wr wr; struct ib_sge sge; + int ret; c->busa = ib_dma_map_single(rdma->cm_id->device, c->rc.sdata, client->msize, @@ -402,7 +403,12 @@ post_recv(struct p9_client *client, struct p9_rdma_context *c) wr.wr_cqe = &c->cqe; wr.sg_list = &sge; wr.num_sge = 1; - return ib_post_recv(rdma->qp, &wr, NULL); + + ret = ib_post_recv(rdma->qp, &wr, NULL); + if (ret) + ib_dma_unmap_single(rdma->cm_id->device, c->busa, + client->msize, DMA_FROM_DEVICE); + return ret; error: p9_debug(P9_DEBUG_ERROR, "EIO\n"); @@ -499,7 +505,7 @@ dont_need_post_recv: if (down_interruptible(&rdma->sq_sem)) { err = -EINTR; - goto send_error; + goto dma_unmap; } /* Mark request as `sent' *before* we actually send it, @@ -509,11 +515,14 @@ dont_need_post_recv: req->status = REQ_STATUS_SENT; err = ib_post_send(rdma->qp, &wr, NULL); if (err) - goto send_error; + goto dma_unmap; /* Success */ return 0; +dma_unmap: + ib_dma_unmap_single(rdma->cm_id->device, c->busa, + c->req->tc.size, DMA_TO_DEVICE); /* Handle errors that happened during or while preparing the send: */ send_error: req->status = REQ_STATUS_ERROR; |