diff options
Diffstat (limited to 'drivers/mtd/nand/nand_base.c')
| -rw-r--r-- | drivers/mtd/nand/nand_base.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c index ce7b2cab5762..3ff583f165cd 100644 --- a/drivers/mtd/nand/nand_base.c +++ b/drivers/mtd/nand/nand_base.c @@ -3979,6 +3979,7 @@ static int nand_dt_init(struct mtd_info *mtd, struct nand_chip *chip, * This is the first phase of the normal nand_scan() function. It reads the * flash ID and sets up MTD fields accordingly. * + * The mtd->owner field must be set to the module of the caller. */ int nand_scan_ident(struct mtd_info *mtd, int maxchips, struct nand_flash_dev *table) @@ -4402,12 +4403,19 @@ EXPORT_SYMBOL(nand_scan_tail); * * This fills out all the uninitialized function pointers with the defaults. * The flash ID is read and the mtd/chip structures are filled with the - * appropriate values. + * appropriate values. The mtd->owner field must be set to the module of the + * caller. */ int nand_scan(struct mtd_info *mtd, int maxchips) { int ret; + /* Many callers got this wrong, so check for it for a while... */ + if (!mtd->owner && caller_is_module()) { + pr_crit("%s called with NULL mtd->owner!\n", __func__); + BUG(); + } + ret = nand_scan_ident(mtd, maxchips, NULL); if (!ret) ret = nand_scan_tail(mtd); |