diff options
| author | Maor Gottlieb <maorg@nvidia.com> | 2021-08-24 17:25:30 +0300 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@nvidia.com> | 2021-08-25 01:52:40 +0300 |
| commit | 3e302dbc6774a27edaea39a1d5107f0c12e35cf2 (patch) | |
| tree | 082ed97d3a748ff89836ba6a2d7954a16fb029c8 /lib/sg_pool.c | |
| parent | 90e7a6de62781c27d6a111fccfb19b807f9b6887 (diff) | |
| download | linux-3e302dbc6774a27edaea39a1d5107f0c12e35cf2.tar.xz | |
lib/scatterlist: Fix wrong update of orig_nents
orig_nents should represent the number of entries with pages,
but __sg_alloc_table_from_pages sets orig_nents as the number of
total entries in the table. This is wrong when the API is used for
dynamic allocation where not all the table entries are mapped with
pages. It wasn't observed until now, since RDMA umem who uses this
API in the dynamic form doesn't use orig_nents implicit or explicit
by the scatterlist APIs.
Fix it by changing the append API to track the SG append table
state and have an API to free the append table according to the
total number of entries in the table.
Now all APIs set orig_nents as number of enries with pages.
Fixes: 07da1223ec93 ("lib/scatterlist: Add support in dynamic allocation of SG table from pages")
Link: https://lore.kernel.org/r/20210824142531.3877007-3-maorg@nvidia.com
Signed-off-by: Maor Gottlieb <maorg@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'lib/sg_pool.c')
| -rw-r--r-- | lib/sg_pool.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/sg_pool.c b/lib/sg_pool.c index db29e5c1f790..a0b1a52cd6f7 100644 --- a/lib/sg_pool.c +++ b/lib/sg_pool.c @@ -90,7 +90,8 @@ void sg_free_table_chained(struct sg_table *table, if (nents_first_chunk == 1) nents_first_chunk = 0; - __sg_free_table(table, SG_CHUNK_SIZE, nents_first_chunk, sg_pool_free); + __sg_free_table(table, SG_CHUNK_SIZE, nents_first_chunk, sg_pool_free, + table->orig_nents); } EXPORT_SYMBOL_GPL(sg_free_table_chained); |