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block: allow deleting zero length partition

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delete_partition() was noop for zero length partition.  As the
addition code allows creating zero lenght partition and deletion is
assumed to always succeed, this causes memory leak for zero length
partitions.  Allow zero length partitions to end their meaningless
lives.

While at it, allow deleting zero lenght partition via
BLKPG_DEL_PARTITION ioctl too.

Signed-off-by: Tejun Heo <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Tejun Heo 2008-08-25 19:30:15 +09:00 • committed by Jens Axboe
commit ec2cdedf79
2 changed files with 0 additions and 4 deletions
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2
block/ioctl.c
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@ -68,8 +68,6 @@ static int blkpg_ioctl(struct block_device *bdev, struct blkpg_ioctl_arg __user
case BLKPG_DEL_PARTITION:
if (!disk->part[part-1])
return -ENXIO;
if (disk->part[part - 1]->nr_sects == 0)
return -ENXIO;
bdevp = bdget_disk(disk, part);
if (!bdevp)
return -ENOMEM;