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mtd: rawnand: mtk: fix possible object reference leak 

of_find_device_by_node() takes a reference to the struct device
when it finds a match via get_device, there is no need to call
get_device() twice.
We also should make sure to drop the reference to the device
taken by of_find_device_by_node() on driver unbind.

Fixes: 1d6b1e4649 ("mtd: mediatek: driver for MTK Smart Device")
Signed-off-by: Wen Yang <yellowriver2010@hotmail.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
This commit is contained in:
Wen Yang 2019-02-07 14:01:32 +00:00 committed by Miquel Raynal
parent 11493f2685
commit 0119720a00
1 changed files with 6 additions and 2 deletions
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8
drivers/mtd/nand/raw/mtk_ecc.c
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@ -267,11 +267,15 @@ static struct mtk_ecc *mtk_ecc_get(struct device_node *np)
struct mtk_ecc *ecc;
pdev = of_find_device_by_node(np);
if (!pdev || !platform_get_drvdata(pdev))
if (!pdev)
return ERR_PTR(-EPROBE_DEFER);
get_device(&pdev->dev);
ecc = platform_get_drvdata(pdev);
if (!ecc) {
put_device(&pdev->dev);
return ERR_PTR(-EPROBE_DEFER);
}
clk_prepare_enable(ecc->clk);
mtk_ecc_hw_init(ecc);