6.1-stable review patch. If anyone has any objections, please let me know.
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From: Miquel Raynal miquel.raynal@bootlin.com
[ Upstream commit 81cb3be3261e766a1f8efab9e3154a4f4fd9d03d ]
There are some un-freed resources in one of the error path which would benefit from a helper going through all the registered mtk chips one by one and perform all the necessary cleanup. This is precisely what the remove path does, so let's extract the logic in a helper.
There is no functional change.
Signed-off-by: Miquel Raynal miquel.raynal@bootlin.com Reviewed-by: Pratyush Yadav pratyush@kernel.org Reviewed-by: Matthias Brugger matthias.bgg@kernel.org Link: https://lore.kernel.org/linux-mtd/20240826153019.67106-1-miquel.raynal@bootl... Stable-dep-of: 2073ae37d550 ("mtd: rawnand: mtk: Fix init error path") Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/mtd/nand/raw/mtk_nand.c | 31 ++++++++++++++++++------------- 1 file changed, 18 insertions(+), 13 deletions(-)
diff --git a/drivers/mtd/nand/raw/mtk_nand.c b/drivers/mtd/nand/raw/mtk_nand.c index 537ac81e661fc..3a2b801937398 100644 --- a/drivers/mtd/nand/raw/mtk_nand.c +++ b/drivers/mtd/nand/raw/mtk_nand.c @@ -1456,6 +1456,23 @@ static int mtk_nfc_nand_chip_init(struct device *dev, struct mtk_nfc *nfc, return 0; }
+static void mtk_nfc_nand_chips_cleanup(struct mtk_nfc *nfc) +{ + struct mtk_nfc_nand_chip *mtk_chip; + struct nand_chip *chip; + int ret; + + while (!list_empty(&nfc->chips)) { + mtk_chip = list_first_entry(&nfc->chips, + struct mtk_nfc_nand_chip, node); + chip = &mtk_chip->nand; + ret = mtd_device_unregister(nand_to_mtd(chip)); + WARN_ON(ret); + nand_cleanup(chip); + list_del(&mtk_chip->node); + } +} + static int mtk_nfc_nand_chips_init(struct device *dev, struct mtk_nfc *nfc) { struct device_node *np = dev->of_node; @@ -1601,20 +1618,8 @@ static int mtk_nfc_probe(struct platform_device *pdev) static int mtk_nfc_remove(struct platform_device *pdev) { struct mtk_nfc *nfc = platform_get_drvdata(pdev); - struct mtk_nfc_nand_chip *mtk_chip; - struct nand_chip *chip; - int ret; - - while (!list_empty(&nfc->chips)) { - mtk_chip = list_first_entry(&nfc->chips, - struct mtk_nfc_nand_chip, node); - chip = &mtk_chip->nand; - ret = mtd_device_unregister(nand_to_mtd(chip)); - WARN_ON(ret); - nand_cleanup(chip); - list_del(&mtk_chip->node); - }
+ mtk_nfc_nand_chips_cleanup(nfc); mtk_ecc_release(nfc->ecc); mtk_nfc_disable_clk(&nfc->clk);