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RDMA/rtrs-srv: Pass the correct number of entries for dma mapped SGL

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[ Upstream commit 56c310de0b ]

ib_dma_map_sg() augments the SGL into a 'dma mapped SGL'. This process
may change the number of entries and the lengths of each entry.

Code that touches dma_address is iterating over the 'dma mapped SGL'
and must use dma_nents which returned from ib_dma_map_sg().

We should use the return count from ib_dma_map_sg for futher usage.

Fixes: 9cb8374804 ("RDMA/rtrs: server: main functionality")
Link: https://lore.kernel.org/r/20220818105355.110344-4-haris.iqbal@ionos.com
Signed-off-by: Jack Wang <jinpu.wang@ionos.com>
Reviewed-by: Aleksei Marov <aleksei.marov@ionos.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Jack Wang 2022-08-18 12:53:55 +02:00 committed by Greg Kroah-Hartman
parent ad69caa478
commit ae8e70e317
1 changed files with 7 additions and 7 deletions
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14
drivers/infiniband/ulp/rtrs/rtrs-srv.c
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@ -600,7 +600,7 @@ static int map_cont_bufs(struct rtrs_srv_path *srv_path)
struct sg_table *sgt = &srv_mr->sgt;
struct scatterlist *s;
struct ib_mr *mr;
int nr, chunks;
int nr, nr_sgt, chunks;
chunks = chunks_per_mr * mri;
if (!always_invalidate)
@ -615,19 +615,19 @@ static int map_cont_bufs(struct rtrs_srv_path *srv_path)
sg_set_page(s, srv->chunks[chunks + i],
max_chunk_size, 0);
nr = ib_dma_map_sg(srv_path->s.dev->ib_dev, sgt->sgl,
nr_sgt = ib_dma_map_sg(srv_path->s.dev->ib_dev, sgt->sgl,
sgt->nents, DMA_BIDIRECTIONAL);
if (nr < sgt->nents) {
err = nr < 0 ? nr : -EINVAL;
if (!nr_sgt) {
err = -EINVAL;
goto free_sg;
}
mr = ib_alloc_mr(srv_path->s.dev->ib_pd, IB_MR_TYPE_MEM_REG,
sgt->nents);
nr_sgt);
if (IS_ERR(mr)) {
err = PTR_ERR(mr);
goto unmap_sg;
}
nr = ib_map_mr_sg(mr, sgt->sgl, sgt->nents,
nr = ib_map_mr_sg(mr, sgt->sgl, nr_sgt,
NULL, max_chunk_size);
if (nr < 0 || nr < sgt->nents) {
err = nr < 0 ? nr : -EINVAL;
@ -646,7 +646,7 @@ static int map_cont_bufs(struct rtrs_srv_path *srv_path)
}
}
/* Eventually dma addr for each chunk can be cached */
for_each_sg(sgt->sgl, s, sgt->orig_nents, i)
for_each_sg(sgt->sgl, s, nr_sgt, i)
srv_path->dma_addr[chunks + i] = sg_dma_address(s);
ib_update_fast_reg_key(mr, ib_inc_rkey(mr->rkey));