diff options
| author | Rakesh Pandit <rakesh@tuxera.com> | 2017-10-13 15:45:56 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2017-10-13 17:34:57 +0300 |
| commit | e57903fd972a398b7140d0bc055714e13a0e58c5 (patch) | |
| tree | 588abe3834761bd39dd27abbb437369e130256a1 /drivers/lightnvm/pblk-core.c | |
| parent | 32c662c58a9b9d0c99e713a14ca323a9a91c73a0 (diff) | |
| download | linux-e57903fd972a398b7140d0bc055714e13a0e58c5.tar.xz | |
lightnvm: pblk: protect line bitmap while submitting meta io
It seems pblk_dealloc_page would race against pblk_alloc_pages for
line bitmap for sector allocation.The chances are very low but might
as well protect the bitmap properly.
Signed-off-by: Rakesh Pandit <rakesh@tuxera.com>
Reviewed-by: Javier González <javier@cnexlabs.com>
Signed-off-by: Matias Bjørling <m@bjorling.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/lightnvm/pblk-core.c')
| -rw-r--r-- | drivers/lightnvm/pblk-core.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/lightnvm/pblk-core.c b/drivers/lightnvm/pblk-core.c index 81501644fb15..b53bb00a9918 100644 --- a/drivers/lightnvm/pblk-core.c +++ b/drivers/lightnvm/pblk-core.c @@ -486,12 +486,14 @@ void pblk_dealloc_page(struct pblk *pblk, struct pblk_line *line, int nr_secs) u64 addr; int i; + spin_lock(&line->lock); addr = find_next_zero_bit(line->map_bitmap, pblk->lm.sec_per_line, line->cur_sec); line->cur_sec = addr - nr_secs; for (i = 0; i < nr_secs; i++, line->cur_sec--) WARN_ON(!test_and_clear_bit(line->cur_sec, line->map_bitmap)); + spin_unlock(&line->lock); } u64 __pblk_alloc_page(struct pblk *pblk, struct pblk_line *line, int nr_secs) |