src/patches/suse-2.6.27.25/patches.fixes/udf-last_block_fix.patch

   1 From: Jan Kara <jack@suse.cz>
   2 Subject: udf: Use device size when drive reported bogus number of written blocks
   3 References: bnc#501663
   4 Patch-mainline: 2.6.31
   5
   6 Some drives report 0 as the number of written blocks when there are some blocks
   7 recorded. Use device size in such case so that we can automagically mount such
   8 media.
   9
  10 Signed-off-by: Jan Kara <jack@suse.cz>
  11
  12 diff -rupX /home/jack/.kerndiffexclude linux-2.6.27-SLE11_BRANCH/fs/udf/lowlevel.c linux-2.6.27-SLE11_BRANCH-1-udf_last_block_fix//fs/udf/lowlevel.c
  13 --- linux-2.6.27-SLE11_BRANCH/fs/udf/lowlevel.c 2008-10-10 00:13:53.000000000 +0200
  14 +++ linux-2.6.27-SLE11_BRANCH-1-udf_last_block_fix//fs/udf/lowlevel.c   2009-06-18 12:08:11.000000000 +0200
  15 @@ -56,7 +56,12 @@ unsigned long udf_get_last_block(struct
  16         struct block_device *bdev = sb->s_bdev;
  17         unsigned long lblock = 0;
  18
  19 -       if (ioctl_by_bdev(bdev, CDROM_LAST_WRITTEN, (unsigned long) &lblock))
  20 +       /*
  21 +        * ioctl failed or returned obviously bogus value?
  22 +        * Try using the device size...
  23 +        */
  24 +       if (ioctl_by_bdev(bdev, CDROM_LAST_WRITTEN, (unsigned long) &lblock) ||
  25 +           lblock == 0)
  26                 lblock = bdev->bd_inode->i_size >> sb->s_blocksize_bits;
  27
  28         if (lblock)