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| author |   Shiraz Saleem <shiraz.saleem@intel.com> | 2019-04-04 10:22:47 -0500 |
|---|---|---|
| committer |   Jason Gunthorpe <jgg@mellanox.com> | 2019-04-08 13:05:25 -0300 |
| commit | d0b5c01bb446f87e94265b172c00f4e89829116d (patch) | |
| tree | 0c8c764b7b0f8f84e8f7498b149ce0be6711f99f /drivers/infiniband/core/umem.c | |
| parent | RDMA/hns: Dump detailed driver-specific CQ (diff) | |
| download | linux-dev-d0b5c01bb446f87e94265b172c00f4e89829116d.tar.xz linux-dev-d0b5c01bb446f87e94265b172c00f4e89829116d.zip | |
RDMA/umem: Use correct value for SG entries in sg_copy_to_buffer()
With page combining, the assumption that number of SG entries in umem SGL
equal to number of system pages in umem no longer holds.
umem->sg_nents tracks the SG entries in umem SGL. Use it in
sg_pcopy_to_buffer() as opposed to ib_umem_num_pages(umem).
Fixes: d10bcf947a3e ("RDMA/umem: Combine contiguous PAGE_SIZE regions in SGEs")
Reported-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'drivers/infiniband/core/umem.c')
| -rw-r--r-- | drivers/infiniband/core/umem.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/infiniband/core/umem.c b/drivers/infiniband/core/umem.c index d31f5e386c7d..7e912a91ec8e 100644 --- a/drivers/infiniband/core/umem.c +++ b/drivers/infiniband/core/umem.c @@ -381,8 +381,8 @@ 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, ib_umem_num_pages(umem), - dst, length, offset + ib_umem_offset(umem)); + ret = sg_pcopy_to_buffer(umem->sg_head.sgl, umem->sg_nents, dst, length, + offset + ib_umem_offset(umem)); if (ret < 0) return ret; |