diff options
| author | Artemy Kovalyov <artemyko@mellanox.com> | 2017-11-14 14:51:59 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-03-24 11:00:24 +0100 |
| commit | 37c704e0ec7f33599866d41921379ffa8d8a7a9e (patch) | |
| tree | ef474ae3c1493077af97b78e5b8c3997ef557b88 | |
| parent | 211a1e9f5efc7eafbe24ddb5601c71e5325db435 (diff) | |
IB/umem: Fix use of npages/nmap fields
[ Upstream commit edf1a84fe37c51290e2c88154ecaf48dadff3d27 ]
In ib_umem structure npages holds original number of sg entries, while
nmap is number of DMA blocks returned by dma_map_sg.
Fixes: c5d76f130b28 ('IB/core: Add umem function to read data from user-space')
Signed-off-by: Artemy Kovalyov <artemyko@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/infiniband/core/umem.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/infiniband/core/umem.c b/drivers/infiniband/core/umem.c index 8e973a2993a6..e74aa1d60fdb 100644 --- a/drivers/infiniband/core/umem.c +++ b/drivers/infiniband/core/umem.c @@ -357,7 +357,7 @@ int ib_umem_copy_from(void *dst, struct ib_umem *umem, size_t offset, return -EINVAL; } - ret = sg_pcopy_to_buffer(umem->sg_head.sgl, umem->nmap, dst, length, + ret = sg_pcopy_to_buffer(umem->sg_head.sgl, umem->npages, dst, length, offset + ib_umem_offset(umem)); if (ret < 0) |