[PATCH] mtd: rawnand: vf610_nfc: Add of_node_put() before goto

[PATCH] mtd: rawnand: vf610_nfc: Add of_node_put() before goto

[Nishka Dasgupta]

Each iteration of for_each_available_child_of_node puts the previous
node, but in the case of a goto from the middle of the loop, there is no
put, thus causing a memory leak. Hence add an of_node_put before the
goto.
Issue found with Coccinelle.

Signed-off-by: Nishka Dasgupta <nishkadg.linux@gmail.com>
---
 drivers/mtd/nand/raw/vf610_nfc.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/mtd/nand/raw/vf610_nfc.c b/drivers/mtd/nand/raw/vf610_nfc.c
index e4fe8c4bc711..6b399a75f9ae 100644
--- a/drivers/mtd/nand/raw/vf610_nfc.c
+++ b/drivers/mtd/nand/raw/vf610_nfc.c
@@ -862,6 +862,7 @@ static int vf610_nfc_probe(struct platform_device *pdev)
 				dev_err(nfc->dev,
 					"Only one NAND chip supported!\n");
 				err = -EINVAL;
+				of_node_put(child);
 				goto err_disable_clk;
 			}
 
-- 
2.19.1


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Re: [PATCH] mtd: rawnand: vf610_nfc: Add of_node_put() before goto

[Stefan Agner]

On 2019-07-09 19:08, Nishka Dasgupta wrote:
> Each iteration of for_each_available_child_of_node puts the previous
> node, but in the case of a goto from the middle of the loop, there is no
> put, thus causing a memory leak. Hence add an of_node_put before the
> goto.
> Issue found with Coccinelle.
> 
> Signed-off-by: Nishka Dasgupta <nishkadg.linux@gmail.com>

Looks good to me:

Reviewed-by: Stefan Agner <stefan@agner.ch>

--
Stefan

> ---
>  drivers/mtd/nand/raw/vf610_nfc.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/mtd/nand/raw/vf610_nfc.c b/drivers/mtd/nand/raw/vf610_nfc.c
> index e4fe8c4bc711..6b399a75f9ae 100644
> --- a/drivers/mtd/nand/raw/vf610_nfc.c
> +++ b/drivers/mtd/nand/raw/vf610_nfc.c
> @@ -862,6 +862,7 @@ static int vf610_nfc_probe(struct platform_device *pdev)
>  				dev_err(nfc->dev,
>  					"Only one NAND chip supported!\n");
>  				err = -EINVAL;
> +				of_node_put(child);
>  				goto err_disable_clk;
>  			}

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Re: [PATCH] mtd: rawnand: vf610_nfc: Add of_node_put() before goto

[Miquel Raynal]

On Tue, 2019-07-09 at 17:08:37 UTC, Nishka Dasgupta wrote:
> Each iteration of for_each_available_child_of_node puts the previous
> node, but in the case of a goto from the middle of the loop, there is no
> put, thus causing a memory leak. Hence add an of_node_put before the
> goto.
> Issue found with Coccinelle.
> 
> Signed-off-by: Nishka Dasgupta <nishkadg.linux@gmail.com>
> Reviewed-by: Stefan Agner <stefan@agner.ch>

Applied to https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git nand/next, thanks.

Miquel

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