When hidden gendisk is revalidated, there's no point in revalidating associated block device as there's none. We would thus just create new bdev inode, report "detected capacity change from 0 to XXX" message and evict the bdev inode again. Avoid this pointless dance and confusing message in the kernel log.
Signed-off-by: Jan Kara <[email protected]> --- fs/block_dev.c | 25 ++++++++++++++++--------- 1 file changed, 16 insertions(+), 9 deletions(-) diff --git a/fs/block_dev.c b/fs/block_dev.c index 0f7552a87d54..9e671bbf7362 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -1405,20 +1405,27 @@ void check_disk_size_change(struct gendisk *disk, struct block_device *bdev, */ int revalidate_disk(struct gendisk *disk) { - struct block_device *bdev; int ret = 0; if (disk->fops->revalidate_disk) ret = disk->fops->revalidate_disk(disk); - bdev = bdget_disk(disk, 0); - if (!bdev) - return ret; - mutex_lock(&bdev->bd_mutex); - check_disk_size_change(disk, bdev, ret == 0); - bdev->bd_invalidated = 0; - mutex_unlock(&bdev->bd_mutex); - bdput(bdev); + /* + * Hidden disks don't have associated bdev so there's no point in + * revalidating it. + */ + if (!(disk->flags & GENHD_FL_HIDDEN)) { + struct block_device *bdev = bdget_disk(disk, 0); + + if (!bdev) + return ret; + + mutex_lock(&bdev->bd_mutex); + check_disk_size_change(disk, bdev, ret == 0); + bdev->bd_invalidated = 0; + mutex_unlock(&bdev->bd_mutex); + bdput(bdev); + } return ret; } EXPORT_SYMBOL(revalidate_disk); -- 2.16.4
