From: Jan Kara jack@suse.cz
commit cba22d86e0a10b7070d2e6a7379dbea51aa0883c upstream.
Currently, block device size in not updated on second and further open for block devices where partition scan is disabled. This is particularly annoying for example for DVD drives as that means block device size does not get updated once the media is inserted into a drive if the device is already open when inserting the media. This is actually always the case for example when pktcdvd is in use.
Fix the problem by revalidating block device size on every open even for devices with partition scan disabled.
Signed-off-by: Jan Kara jack@suse.cz Signed-off-by: Jens Axboe axboe@kernel.dk Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- fs/block_dev.c | 19 ++++++++++--------- 1 file changed, 10 insertions(+), 9 deletions(-)
--- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -1328,11 +1328,7 @@ static void flush_disk(struct block_devi "resized disk %s\n", bdev->bd_disk ? bdev->bd_disk->disk_name : ""); } - - if (!bdev->bd_disk) - return; - if (disk_part_scan_enabled(bdev->bd_disk)) - bdev->bd_invalidated = 1; + bdev->bd_invalidated = 1; }
/** @@ -1432,10 +1428,15 @@ static void __blkdev_put(struct block_de
static void bdev_disk_changed(struct block_device *bdev, bool invalidate) { - if (invalidate) - invalidate_partitions(bdev->bd_disk, bdev); - else - rescan_partitions(bdev->bd_disk, bdev); + if (disk_part_scan_enabled(bdev->bd_disk)) { + if (invalidate) + invalidate_partitions(bdev->bd_disk, bdev); + else + rescan_partitions(bdev->bd_disk, bdev); + } else { + check_disk_size_change(bdev->bd_disk, bdev, !invalidate); + bdev->bd_invalidated = 0; + } }
/*