Re: [PATCH] phy: marvell: phy-mvebu-a3700-comphy: Add of_node_put() before return

From: Miquel Raynal
Date: Tue Jul 23 2019 - 10:08:22 EST


Hi Nishka,

Nishka Dasgupta <nishkadg.linux@xxxxxxxxx> wrote on Tue, 23 Jul 2019
16:21:08 +0530:

> Each iteration of for_each_available_child_of_node puts the previous
> node, but in the case of a return from the middle of the loop, there is
> no put, thus causing a memory leak. Hence add an of_node_put before the
> return in two places.
> Issue found with Coccinelle.
>
> Signed-off-by: Nishka Dasgupta <nishkadg.linux@xxxxxxxxx>
> ---
> drivers/phy/marvell/phy-mvebu-a3700-comphy.c | 8 ++++++--
> 1 file changed, 6 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/phy/marvell/phy-mvebu-a3700-comphy.c b/drivers/phy/marvell/phy-mvebu-a3700-comphy.c
> index 8812a104c233..0ebac46435bd 100644
> --- a/drivers/phy/marvell/phy-mvebu-a3700-comphy.c
> +++ b/drivers/phy/marvell/phy-mvebu-a3700-comphy.c
> @@ -277,13 +277,17 @@ static int mvebu_a3700_comphy_probe(struct platform_device *pdev)
> }
>
> lane = devm_kzalloc(&pdev->dev, sizeof(*lane), GFP_KERNEL);
> - if (!lane)
> + if (!lane) {
> + of_node_put(child);
> return -ENOMEM;
> + }
>
> phy = devm_phy_create(&pdev->dev, child,
> &mvebu_a3700_comphy_ops);
> - if (IS_ERR(phy))
> + if (IS_ERR(phy)) {
> + of_node_put(child);
> return PTR_ERR(phy);
> + }
>
> lane->dev = &pdev->dev;
> lane->mode = PHY_MODE_INVALID;

Reviewed-by: Miquel Raynal <miquel.raynal@xxxxxxxxxxx>


Thanks,
MiquÃl