->meta_bdev is optional and not set for most arrays. Add a
rdev_read_only helper that calls bdev_read_only for both devices
in a safe way.
Fixes: 6f0d9689b670 ("block: remove the NULL bdev check in bdev_read_only")
Reported-by: Guoqing Jiang <guoqing.jiang@xxxxxxxxxxxxxxx>
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
drivers/md/md.c | 13 ++++++++-----
1 file changed, 8 insertions(+), 5 deletions(-)
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 399c81bddc1ae1..7c0f6107865383 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -2399,6 +2399,12 @@ int md_integrity_add_rdev(struct md_rdev *rdev, struct mddev *mddev)
}
EXPORT_SYMBOL(md_integrity_add_rdev);
+static bool rdev_read_only(struct md_rdev *rdev)
+{
+ return bdev_read_only(rdev->bdev) ||
+ (rdev->meta_bdev && bdev_read_only(rdev->meta_bdev));
+}
+
static int bind_rdev_to_array(struct md_rdev *rdev, struct mddev *mddev)
{
char b[BDEVNAME_SIZE];
@@ -2408,8 +2414,7 @@ static int bind_rdev_to_array(struct md_rdev *rdev, struct mddev *mddev)
if (find_rdev(mddev, rdev->bdev->bd_dev))
return -EEXIST;
- if ((bdev_read_only(rdev->bdev) || bdev_read_only(rdev->meta_bdev)) &&
- mddev->pers)
+ if (rdev_read_only(rdev) && mddev->pers)
return -EROFS;
/* make sure rdev->sectors exceeds mddev->dev_sectors */
@@ -5843,9 +5848,7 @@ int md_run(struct mddev *mddev)
continue;
sync_blockdev(rdev->bdev);
invalidate_bdev(rdev->bdev);
- if (mddev->ro != 1 &&
- (bdev_read_only(rdev->bdev) ||
- bdev_read_only(rdev->meta_bdev))) {
+ if (mddev->ro != 1 && rdev_read_only(rdev)) {
mddev->ro = 1;
if (mddev->gendisk)
set_disk_ro(mddev->gendisk, 1);
--
2.29.2
