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nvme-rdma: fix error flow during mapping request data

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After dma mapping the sgl, we map the sgl to nvme sgl descriptor. In case
of failure during the last mapping we never dma unmap the sgl.

Signed-off-by: Max Gurtovoy <maxg@mellanox.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Max Gurtovoy 2018-06-10 16:58:29 +03:00 committed by Christoph Hellwig
parent 2796b56959
commit 94423a8f89
1 changed files with 24 additions and 7 deletions
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31
drivers/nvme/host/rdma.c
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@ -1189,21 +1189,38 @@ static int nvme_rdma_map_data(struct nvme_rdma_queue *queue,
count = ib_dma_map_sg(ibdev, req->sg_table.sgl, req->nents,
rq_data_dir(rq) == WRITE ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
if (unlikely(count <= 0)) {
sg_free_table_chained(&req->sg_table, true);
return -EIO;
ret = -EIO;
goto out_free_table;
}
if (count == 1) {
if (rq_data_dir(rq) == WRITE && nvme_rdma_queue_idx(queue) &&
blk_rq_payload_bytes(rq) <=
nvme_rdma_inline_data_size(queue))
return nvme_rdma_map_sg_inline(queue, req, c);
nvme_rdma_inline_data_size(queue)) {
ret = nvme_rdma_map_sg_inline(queue, req, c);
goto out;
}
if (dev->pd->flags & IB_PD_UNSAFE_GLOBAL_RKEY)
return nvme_rdma_map_sg_single(queue, req, c);
if (dev->pd->flags & IB_PD_UNSAFE_GLOBAL_RKEY) {
ret = nvme_rdma_map_sg_single(queue, req, c);
goto out;
}
}
return nvme_rdma_map_sg_fr(queue, req, c, count);
ret = nvme_rdma_map_sg_fr(queue, req, c, count);
out:
if (unlikely(ret))
goto out_unmap_sg;
return 0;
out_unmap_sg:
ib_dma_unmap_sg(ibdev, req->sg_table.sgl,
req->nents, rq_data_dir(rq) ==
WRITE ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
out_free_table:
sg_free_table_chained(&req->sg_table, true);
return ret;
}
static void nvme_rdma_send_done(struct ib_cq *cq, struct ib_wc *wc)