linux-kernel - Re: [PATCH 1/3] net: dsa: Use devm

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Message-ID: <560E86BC.3090104@cogentembedded.com>
Date:	Fri, 2 Oct 2015 16:29:32 +0300
From:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:	Neil Armstrong <narmstrong@...libre.com>,
	"David S. Miller" <davem@...emloft.net>,
	Jesper Dangaard Brouer <brouer@...hat.com>
Cc:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3] net: dsa: Use devm_ prefixed allocations

On 10/2/2015 1:48 PM, Neil Armstrong wrote:

> To simplify and prevent memory leakage when unbinding, use
> the devm_ memory allocation calls.
>
> Tested-by: Andrew Lunn <andrew@...n.ch>
> Tested-by: Florian Fainelli <f.fainelli@...il.com>
> Signed-off-by: Neil Armstrong <narmstrong@...libre.com>
> ---
>   net/dsa/dsa.c | 6 +++---
>   1 file changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/net/dsa/dsa.c b/net/dsa/dsa.c
> index c59fa5d..98f94c2 100644
> --- a/net/dsa/dsa.c
> +++ b/net/dsa/dsa.c
> @@ -305,7 +305,7 @@ static int dsa_switch_setup_one(struct dsa_switch *ds, struct device *parent)
>   	if (ret < 0)
>   		goto out;
>
> -	ds->slave_mii_bus = mdiobus_alloc();
> +	ds->slave_mii_bus = devm_mdiobus_alloc(parent);
>   	if (ds->slave_mii_bus == NULL) {
>   		ret = -ENOMEM;
>   		goto out;
> @@ -400,7 +400,7 @@ dsa_switch_setup(struct dsa_switch_tree *dst, int index,
>   	/*
>   	 * Allocate and initialise switch state.
>   	 */
> -	ds = kzalloc(sizeof(*ds) + drv->priv_size, GFP_KERNEL);
> +	ds = devm_kzalloc(parent, sizeof(*ds) + drv->priv_size, GFP_KERNEL);
>   	if (ds == NULL)
>   		return ERR_PTR(-ENOMEM);
>
> @@ -883,7 +883,7 @@ static int dsa_probe(struct platform_device *pdev)
>   		goto out;
>   	}
>
> -	dst = kzalloc(sizeof(*dst), GFP_KERNEL);
> +	dst = devm_kzalloc(&pdev->dev, sizeof(*dst), GFP_KERNEL);
>   	if (dst == NULL) {
>   		dev_put(dev);
>   		ret = -ENOMEM;
>

    Shouldn't you remove the correspoding kfree(), etc. calls?

MBR, Sergei

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