From: Boris BREZILLON Date: Mon, 14 Dec 2015 15:13:31 +0000 (+0100) Subject: mtd: nand: remove unused and buggy get_platform_nandchip() helper function X-Git-Tag: v3.16.35~541 X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=f1b1b603033d86883b8c0cfd591d1ac93c680e5c;p=thirdparty%2Fkernel%2Fstable.git mtd: nand: remove unused and buggy get_platform_nandchip() helper function commit 8142b47ef33c655a34e08efd46b65732fe190675 upstream. Nobody uses the get_platform_nandchip() helper function which is supposed to return a pointer to a platform_nand_chip struct from an mtd_info pointer. Moreover, this function is buggy since the introduction of the plat_nand layer (chip->priv is now storing a pointer to an intermediate plat_nand_data structure allocated in plat_nand_probe(), and we have no way to retrieve a pointer to the provided platform_nand_chip struct from this plat_nand_data pointer). While we are at it, remove the useless (and buggy, since it's pointing to something stored on the stack) data->chip.priv assignment. Signed-off-by: Boris Brezillon Fixes: 711fdf627ce1 ("[MTD] [NAND] platform NAND driver: add driver") Cc: Vitaly Wool Signed-off-by: Brian Norris [ luis: backported to 3.16: adjusted context ] Signed-off-by: Luis Henriques --- diff --git a/drivers/mtd/nand/plat_nand.c b/drivers/mtd/nand/plat_nand.c index 0b068a5c0bff3..d6fe74f5f208b 100644 --- a/drivers/mtd/nand/plat_nand.c +++ b/drivers/mtd/nand/plat_nand.c @@ -59,7 +59,6 @@ static int plat_nand_probe(struct platform_device *pdev) if (IS_ERR(data->io_base)) return PTR_ERR(data->io_base); - data->chip.priv = &data; data->mtd.priv = &data->chip; data->mtd.owner = THIS_MODULE; data->mtd.name = dev_name(&pdev->dev); diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h index 2b468f73f53dd..6ea81247968e3 100644 --- a/include/linux/mtd/nand.h +++ b/include/linux/mtd/nand.h @@ -882,15 +882,6 @@ struct platform_nand_data { struct platform_nand_ctrl ctrl; }; -/* Some helpers to access the data structures */ -static inline -struct platform_nand_chip *get_platform_nandchip(struct mtd_info *mtd) -{ - struct nand_chip *chip = mtd->priv; - - return chip->priv; -} - /* return the supported features. */ static inline int onfi_feature(struct nand_chip *chip) {