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block: make add_partition() return pointer to hd_struct

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Make add_partition() return pointer to the new hd_struct on success
and ERR_PTR() value on failure.  This change will be used to fix md
autodetection bug.

Signed-off-by: Tejun Heo <[email protected]>
Cc: Neil Brown <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Tejun Heo 2008-11-10 15:29:58 +09:00 • committed by Jens Axboe
commit ba32929a91
3 changed files with 19 additions and 17 deletions
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7
block/ioctl.c
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@ -18,7 +18,6 @@ static int blkpg_ioctl(struct block_device *bdev, struct blkpg_ioctl_arg __user
struct disk_part_iter piter;
long long start, length;
int partno;
int err;
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
@ -61,10 +60,10 @@ static int blkpg_ioctl(struct block_device *bdev, struct blkpg_ioctl_arg __user
disk_part_iter_exit(&piter);
/* all seems OK */
err = add_partition(disk, partno, start, length,
ADDPART_FLAG_NONE);
part = add_partition(disk, partno, start, length,
ADDPART_FLAG_NONE);
mutex_unlock(&bdev->bd_mutex);
return err;
return IS_ERR(part) ? PTR_ERR(part) : 0;
case BLKPG_DEL_PARTITION:
part = disk_get_part(disk, partno);
if (!part)