diff options
| -rw-r--r-- | drivers/mtd/mtd_blkdevs.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/mtd/mtd_blkdevs.c b/drivers/mtd/mtd_blkdevs.c index 85a52b3c7698..2f8c202dbd86 100644 --- a/drivers/mtd/mtd_blkdevs.c +++ b/drivers/mtd/mtd_blkdevs.c @@ -242,9 +242,12 @@ int add_mtd_blktrans_dev(struct mtd_blktrans_dev *new) if (new->devnum == -1) new->devnum = last_devnum+1; - if ((new->devnum << tr->part_bits) > 256) { + /* Check that the device and any partitions will get valid + * minor numbers and that the disk naming code below can cope + * with this number. */ + if (new->devnum > (MINORMASK >> tr->part_bits) || + (tr->part_bits && new->devnum >= 27 * 26)) return -EBUSY; - } list_add_tail(&new->list, &tr->devs); added: |