From 20c07a5bf094198ff2382aa5e7c930b3c9807792 Mon Sep 17 00:00:00 2001 From: Ezequiel García Date: Fri, 1 Apr 2016 18:29:23 -0300 Subject: mtd: nand: Drop mtd.owner requirement in nand_scan Since commit 807f16d4db95 ("mtd: core: set some defaults when dev.parent is set"), it's now legal for drivers to call nand_scan and nand_scan_ident without setting mtd.owner. Drop the check and while at it remove the BUG() abuse. Fixes: 807f16d4db95 ("mtd: core: set some defaults when dev.parent is set") Signed-off-by: Ezequiel Garcia Acked-by: Boris Brezillon [Brian: editorial note - while commit 807f16d4db95 wasn't explicitly broken, some follow-up commits in the v4.4 release broke a few drivers, since they would hit this BUG() if they used nand_scan() and were built as modules] Signed-off-by: Brian Norris --- drivers/mtd/nand/nand_base.c | 10 +--------- 1 file changed, 1 insertion(+), 9 deletions(-) diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c index b6facac54fc0..557b8462f55e 100644 --- a/drivers/mtd/nand/nand_base.c +++ b/drivers/mtd/nand/nand_base.c @@ -4009,7 +4009,6 @@ static int nand_dt_init(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) @@ -4429,19 +4428,12 @@ 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. The mtd->owner field must be set to the module of the - * caller. + * appropriate values. */ 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); -- cgit v1.2.3