Merge branch 'for-linus' of git://git.infradead.org/users/sameo/mfd-2.6

[pandora-kernel.git] / drivers / md / md.c

diff --git a/drivers/md/md.c b/drivers/md/md.c
index 3742ce8..5404b22 100644 (file)
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -1138,8 +1138,11 @@ static int super_90_load(mdk_rdev_t *rdev, mdk_rdev_t *refdev, int minor_version
                        ret = 0;
        }
        rdev->sectors = rdev->sb_start;
+       /* Limit to 4TB as metadata cannot record more than that */
+       if (rdev->sectors >= (2ULL << 32))
+               rdev->sectors = (2ULL << 32) - 2;
 
-       if (rdev->sectors < sb->size * 2 && sb->level > 1)
+       if (rdev->sectors < ((sector_t)sb->size) * 2 && sb->level >= 1)
                /* "this cannot possibly happen" ... */
                ret = -EINVAL;
 
@@ -1173,7 +1176,7 @@ static int super_90_validate(mddev_t *mddev, mdk_rdev_t *rdev)
                mddev->clevel[0] = 0;
                mddev->layout = sb->layout;
                mddev->raid_disks = sb->raid_disks;
-               mddev->dev_sectors = sb->size * 2;
+               mddev->dev_sectors = ((sector_t)sb->size) * 2;
                mddev->events = ev1;
                mddev->bitmap_info.offset = 0;
                mddev->bitmap_info.default_offset = MD_SB_BYTES >> 9;
@@ -1415,6 +1418,11 @@ super_90_rdev_size_change(mdk_rdev_t *rdev, sector_t num_sectors)
        rdev->sb_start = calc_dev_sboffset(rdev);
        if (!num_sectors || num_sectors > rdev->sb_start)
                num_sectors = rdev->sb_start;
+       /* Limit to 4TB as metadata cannot record more than that.
+        * 4TB == 2^32 KB, or 2*2^32 sectors.
+        */
+       if (num_sectors >= (2ULL << 32))
+               num_sectors = (2ULL << 32) - 2;
        md_super_write(rdev->mddev, rdev, rdev->sb_start, rdev->sb_size,
                       rdev->sb_page);
        md_super_wait(rdev->mddev);