2.6.30-stable review patch. If anyone has any objections, please let us know. ------------------ From: Jan Kara commit 24a5d59f3477bcff4c069ff4d0ca9a3e037d0235 upstream. Some drives report 0 as the number of written blocks when there are some blocks recorded. Use device size in such case so that we can automagically mount such media. Signed-off-by: Jan Kara Signed-off-by: Greg Kroah-Hartman --- fs/udf/lowlevel.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) --- a/fs/udf/lowlevel.c +++ b/fs/udf/lowlevel.c @@ -56,7 +56,12 @@ unsigned long udf_get_last_block(struct struct block_device *bdev = sb->s_bdev; unsigned long lblock = 0; - if (ioctl_by_bdev(bdev, CDROM_LAST_WRITTEN, (unsigned long) &lblock)) + /* + * ioctl failed or returned obviously bogus value? + * Try using the device size... + */ + if (ioctl_by_bdev(bdev, CDROM_LAST_WRITTEN, (unsigned long) &lblock) || + lblock == 0) lblock = bdev->bd_inode->i_size >> sb->s_blocksize_bits; if (lblock) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/