renegade-project/linux-next
2
0
Fork 0
mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-27 06:34:11 +08:00
Code

RDMA/umem: Use correct value for SG entries in sg_copy_to_buffer()

Browse Source 
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: d10bcf947a ("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>
This commit is contained in:
Shiraz Saleem 2019-04-04 10:22:47 -05:00 committed by Jason Gunthorpe
parent e1c9a0dc29
commit d0b5c01bb4
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/infiniband/core/umem.c
View File

@ -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;