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Message-ID: <5652D290.8090705@lightnvm.io>
Date: Mon, 23 Nov 2015 09:47:12 +0100
From: Matias Bjørling <mb@...htnvm.io>
To: Wenwei Tao <ww.tao0320@...il.com>
CC: linux-kernel@...r.kernel.org, linux-block@...r.kernel.org
Subject: Re: [PATCH] lightnvm: free allocated memory when gennvm register
fails
On 11/23/2015 09:29 AM, Wenwei Tao wrote:
> free allocated nvm block and gennvm lun structures when
> gennvm register fails, otherwise it will cause memory leak.
>
> Signed-off-by: Wenwei Tao <ww.tao0320@...il.com>
> ---
> drivers/lightnvm/gennvm.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/drivers/lightnvm/gennvm.c b/drivers/lightnvm/gennvm.c
> index ae1fb2b..03fc7a5 100644
> --- a/drivers/lightnvm/gennvm.c
> +++ b/drivers/lightnvm/gennvm.c
> @@ -211,12 +211,15 @@ static int gennvm_register(struct nvm_dev *dev)
> ret = gennvm_blocks_init(dev, gn);
> if (ret) {
> pr_err("gennvm: could not initialize blocks\n");
> + gennvm_blocks_free(dev);
> + gennvm_luns_free(dev);
> goto err;
> }
>
> return 1;
> err:
> kfree(gn);
> + dev->mp = NULL;
> return ret;
> }
>
>
Thanks Tao, would it be okay with you if I apply the patch like this:
diff --git i/drivers/lightnvm/gennvm.c w/drivers/lightnvm/gennvm.c
index e20e74e..3969a98 100644
--- i/drivers/lightnvm/gennvm.c
+++ w/drivers/lightnvm/gennvm.c
@@ -207,6 +207,14 @@ static int gennvm_blocks_init(struct nvm_dev *dev,
struct gen_nvm *gn)
return 0;
}
+static void gennvm_free(struct nvm_dev *dev)
+{
+ gennvm_blocks_free(dev);
+ gennvm_luns_free(dev);
+ kfree(dev->mp);
+ dev->mp = NULL;
+}
+
static int gennvm_register(struct nvm_dev *dev)
{
struct gen_nvm *gn;
@@ -234,16 +242,13 @@ static int gennvm_register(struct nvm_dev *dev)
return 1;
err:
- kfree(gn);
+ gennvm_free(dev);
return ret;
}
static void gennvm_unregister(struct nvm_dev *dev)
{
- gennvm_blocks_free(dev);
- gennvm_luns_free(dev);
- kfree(dev->mp);
- dev->mp = NULL;
+ gennvm_free(dev);
}
--
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