diff options
Diffstat (limited to 'fs/udf/lowlevel.c')
| -rw-r--r-- | fs/udf/lowlevel.c | 33 |
1 files changed, 14 insertions, 19 deletions
diff --git a/fs/udf/lowlevel.c b/fs/udf/lowlevel.c index 08421610766..6583fe9b064 100644 --- a/fs/udf/lowlevel.c +++ b/fs/udf/lowlevel.c @@ -23,46 +23,41 @@ #include <linux/cdrom.h> #include <asm/uaccess.h> -#include <linux/udf_fs.h> #include "udf_sb.h" -unsigned int -udf_get_last_session(struct super_block *sb) +unsigned int udf_get_last_session(struct super_block *sb) { struct cdrom_multisession ms_info; unsigned int vol_desc_start; struct block_device *bdev = sb->s_bdev; int i; - vol_desc_start=0; - ms_info.addr_format=CDROM_LBA; - i = ioctl_by_bdev(bdev, CDROMMULTISESSION, (unsigned long) &ms_info); + vol_desc_start = 0; + ms_info.addr_format = CDROM_LBA; + i = ioctl_by_bdev(bdev, CDROMMULTISESSION, (unsigned long)&ms_info); -#define WE_OBEY_THE_WRITTEN_STANDARDS 1 - - if (i == 0) - { + if (i == 0) { udf_debug("XA disk: %s, vol_desc_start=%d\n", - (ms_info.xa_flag ? "yes" : "no"), ms_info.addr.lba); -#if WE_OBEY_THE_WRITTEN_STANDARDS + ms_info.xa_flag ? "yes" : "no", ms_info.addr.lba); if (ms_info.xa_flag) /* necessary for a valid ms_info.addr */ -#endif vol_desc_start = ms_info.addr.lba; - } - else - { + } else { udf_debug("CDROMMULTISESSION not supported: rc=%d\n", i); } return vol_desc_start; } -unsigned long -udf_get_last_block(struct super_block *sb) +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) |