From: Yu Kuai <yukuai3@xxxxxxxxxx>
The calculation is just wrong, fix it by round_up().
Fixes: 9ead7efc6f3f ("brd: implement discard support")
Signed-off-by: Yu Kuai <yukuai3@xxxxxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
---
drivers/block/brd.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/block/brd.c b/drivers/block/brd.c
index 98c9297beafe..567aee2f882c 100644
--- a/drivers/block/brd.c
+++ b/drivers/block/brd.c
@@ -160,7 +160,7 @@ static void brd_free_one_page(struct rcu_head *head)
static void brd_do_discard(struct brd_device *brd, sector_t sector, u32 size)
{
- sector_t aligned_sector = (sector + PAGE_SECTORS) & ~PAGE_SECTORS;
+ sector_t aligned_sector = round_up(sector, PAGE_SECTORS);
struct page *page;
size -= (aligned_sector - sector) * SECTOR_SIZE;
--
2.39.2
