From: Rakesh Pandit <[email protected]> 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 <[email protected]> Reviewed-by: Javier González <[email protected]> Signed-off-by: Matias Bjørling <[email protected]> --- drivers/lightnvm/pblk-core.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/lightnvm/pblk-core.c b/drivers/lightnvm/pblk-core.c index 8150164..b53bb00 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) -- 2.9.3
