My static checker complains about this line from dmz_get_zoned_device()
aligned_capacity = dev->capacity & ~(blk_queue_zone_sectors(q) - 1);
The problem is that "aligned_capacity" and "dev->capacity" are sector_t
type (which is a u64) but blk_queue_zone_sectors(q) returns a u32 so the
higher 32 bits in "aligned_capacity" are always cleared to zero. This
patch adds a cast to u64 to address this issue.
Fixes: 114e025968b5 ("dm zoned: ignore last smaller runt zone")
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
---
v2: In v1 I changed blk_queue_zone_sectors() to return a sector_t type,
but in v2 I just add a cast. The v2 fix would end up going through
different maintainers and reviewers so the CC list has grown...
Original discussion: https://marc.info/?l=kernel-janitors&m=155487663405737&w=2
drivers/md/dm-zoned-target.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/md/dm-zoned-target.c b/drivers/md/dm-zoned-target.c
index 8865c1709e16..b6cb44fa946d 100644
--- a/drivers/md/dm-zoned-target.c
+++ b/drivers/md/dm-zoned-target.c
@@ -643,7 +643,8 @@ static int dmz_get_zoned_device(struct dm_target *ti, char *path)
q = bdev_get_queue(dev->bdev);
dev->capacity = i_size_read(dev->bdev->bd_inode) >> SECTOR_SHIFT;
- aligned_capacity = dev->capacity & ~(blk_queue_zone_sectors(q) - 1);
+ aligned_capacity = dev->capacity &
+ ~((u64)blk_queue_zone_sectors(q) - 1);
if (ti->begin ||
((ti->len != dev->capacity) && (ti->len != aligned_capacity))) {
ti->error = "Partial mapping not supported";
--
2.17.1
