From 24c9cd8f8d26194aa1a4077c62df90d657766235 Mon Sep 17 00:00:00 2001 From: Arvind Yadav Date: Tue, 1 Aug 2017 17:07:27 +0530 Subject: [PATCH] mtd: oxnas_nand: Handle clk_prepare_enable/clk_disable_unprepare. - clk_prepare_enable() can fail here and we must check its return value. - oxnas_nand_probe() can fail here and we must disable clock. Signed-off-by: Arvind Yadav Acked-by: Neil Armstrong Signed-off-by: Boris Brezillon --- drivers/mtd/nand/oxnas_nand.c | 25 ++++++++++++++++++------- 1 file changed, 18 insertions(+), 7 deletions(-) diff --git a/drivers/mtd/nand/oxnas_nand.c b/drivers/mtd/nand/oxnas_nand.c index 1b207aa..7061bb2 100644 --- a/drivers/mtd/nand/oxnas_nand.c +++ b/drivers/mtd/nand/oxnas_nand.c @@ -112,14 +112,19 @@ static int oxnas_nand_probe(struct platform_device *pdev) if (count > 1) return -EINVAL; - clk_prepare_enable(oxnas->clk); + err = clk_prepare_enable(oxnas->clk); + if (err) + return err; + device_reset_optional(&pdev->dev); for_each_child_of_node(np, nand_np) { chip = devm_kzalloc(&pdev->dev, sizeof(struct nand_chip), GFP_KERNEL); - if (!chip) - return -ENOMEM; + if (!chip) { + err = -ENOMEM; + goto err_clk_unprepare; + } chip->controller = &oxnas->base; @@ -139,12 +144,12 @@ static int oxnas_nand_probe(struct platform_device *pdev) /* Scan to find existence of the device */ err = nand_scan(mtd, 1); if (err) - return err; + goto err_clk_unprepare; err = mtd_device_register(mtd, NULL, 0); if (err) { nand_release(mtd); - return err; + goto err_clk_unprepare; } oxnas->chips[nchips] = chip; @@ -152,12 +157,18 @@ static int oxnas_nand_probe(struct platform_device *pdev) } /* Exit if no chips found */ - if (!nchips) - return -ENODEV; + if (!nchips) { + err = -ENODEV; + goto err_clk_unprepare; + } platform_set_drvdata(pdev, oxnas); return 0; + +err_clk_unprepare: + clk_disable_unprepare(oxnas->clk); + return err; } static int oxnas_nand_remove(struct platform_device *pdev) -- 2.7.4