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Commit 24a5d59f authored by Jan Kara's avatar Jan Kara
Browse files

udf: Use device size when drive reported bogus number of written blocks 



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: default avatarJan Kara <jack@suse.cz>
parent 1d89b30c

fs/udf/lowlevel.c

+6 −1
Original line number Diff line number Diff line
@@ -56,7 +56,12 @@ unsigned long udf_get_last_block(struct super_block *sb) 
	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)