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mtd: rawnand: jz4780: fix possible object reference leak

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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: ae02ab00aa ("mtd: nand: jz4780: driver for NAND devices on JZ4780 SoCs")
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 14:01:23 +00:00 committed by Miquel Raynal
parent a12085d139
commit 11493f2685
1 changed files with 6 additions and 3 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

9
drivers/mtd/nand/raw/jz4780_bch.c
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@ -281,12 +281,15 @@ static struct jz4780_bch *jz4780_bch_get(struct device_node *np)
struct jz4780_bch *bch; struct jz4780_bch *bch;
pdev = of_find_device_by_node(np); pdev = of_find_device_by_node(np);
if (!pdev || !platform_get_drvdata(pdev)) if (!pdev)
return ERR_PTR(-EPROBE_DEFER); return ERR_PTR(-EPROBE_DEFER);
get_device(&pdev->dev);
bch = platform_get_drvdata(pdev); bch = platform_get_drvdata(pdev);
if (!bch) {
put_device(&pdev->dev);
return ERR_PTR(-EPROBE_DEFER);
}
clk_prepare_enable(bch->clk); clk_prepare_enable(bch->clk);
return bch; return bch;