[PATCH] nvmem: delete unneeded IS_ERR test

[PATCH] nvmem: delete unneeded IS_ERR test

[Julia Lawall]

devm_kzalloc returns NULL rather than an ERR_PTR value.

The semantic match that finds this problem is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
expression x,e;
@@

* x = devm_kzalloc(...)
... when != x = e
* IS_ERR(x)
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>

---
 drivers/nvmem/rockchip-efuse.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/nvmem/rockchip-efuse.c b/drivers/nvmem/rockchip-efuse.c
index f552134..811c73c 100644
--- a/drivers/nvmem/rockchip-efuse.c
+++ b/drivers/nvmem/rockchip-efuse.c
@@ -136,8 +136,8 @@ static int rockchip_efuse_probe(struct platform_device *pdev)
 
 	context = devm_kzalloc(dev, sizeof(struct rockchip_efuse_context),
 			       GFP_KERNEL);
-	if (IS_ERR(context))
-		return PTR_ERR(context);
+	if (!context)
+		return -ENOMEM;
 
 	clk = devm_clk_get(dev, "pclk_efuse");
 	if (IS_ERR(clk))

[PATCH] nvmem: delete unneeded IS_ERR test

[Caesar Wang]

Hi Julia,

Thanks to check this, but there was a patch fixing it.:-)


? 2015?12?20? 05:19, Julia Lawall ??:
> devm_kzalloc returns NULL rather than an ERR_PTR value.
>
> The semantic match that finds this problem is as follows:
> (http://coccinelle.lip6.fr/)
>
> // <smpl>
> @@
> expression x,e;
> @@
>
> * x = devm_kzalloc(...)
> ... when != x = e
> * IS_ERR(x)
> // </smpl>
>
> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
>
> ---
>   drivers/nvmem/rockchip-efuse.c |    4 ++--
>   1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/nvmem/rockchip-efuse.c b/drivers/nvmem/rockchip-efuse.c
> index f552134..811c73c 100644
> --- a/drivers/nvmem/rockchip-efuse.c
> +++ b/drivers/nvmem/rockchip-efuse.c
> @@ -136,8 +136,8 @@ static int rockchip_efuse_probe(struct platform_device *pdev)
>   
>   	context = devm_kzalloc(dev, sizeof(struct rockchip_efuse_context),
>   			       GFP_KERNEL);
> -	if (IS_ERR(context))
> -		return PTR_ERR(context);
> +	if (!context)
> +		return -ENOMEM;

Fixed in this patch[0].

patch[0]:
https://patchwork.kernel.org/patch/7842821/

Thanks,
Caesar
>   
>   	clk = devm_clk_get(dev, "pclk_efuse");
>   	if (IS_ERR(clk))
>
>
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