[PATCH] clk: samsung: exynos5420: Remove useless check for return value of samsung_clk_init

[PATCH] clk: samsung: exynos5420: Remove useless check for return value of samsung_clk_init

[Krzysztof Kozlowski]

The samsung_clk_init() cannot return NULL. Either it returns allocated
memory or it panics.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
---
 drivers/clk/samsung/clk-exynos5420.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/clk/samsung/clk-exynos5420.c b/drivers/clk/samsung/clk-exynos5420.c
index 92382cef9f90..770c0f007c6b 100644
--- a/drivers/clk/samsung/clk-exynos5420.c
+++ b/drivers/clk/samsung/clk-exynos5420.c
@@ -1356,8 +1356,6 @@ static void __init exynos5x_clk_init(struct device_node *np,
 	exynos5x_soc = soc;
 
 	ctx = samsung_clk_init(np, reg_base, CLK_NR_CLKS);
-	if (!ctx)
-		panic("%s: unable to allocate context.\n", __func__);
 
 	samsung_clk_of_register_fixed_ext(ctx, exynos5x_fixed_rate_ext_clks,
 			ARRAY_SIZE(exynos5x_fixed_rate_ext_clks),
-- 
2.5.0

Re: [PATCH] clk: samsung: exynos5420: Remove useless check for return value of samsung_clk_init

[Javier Martinez Canillas]

Hello Krzysztof,

On 05/08/2016 05:24 AM, Krzysztof Kozlowski wrote:
> The samsung_clk_init() cannot return NULL. Either it returns allocated
> memory or it panics.
> 
> Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
> ---
>  drivers/clk/samsung/clk-exynos5420.c | 2 --
>  1 file changed, 2 deletions(-)
> 
> diff --git a/drivers/clk/samsung/clk-exynos5420.c b/drivers/clk/samsung/clk-exynos5420.c
> index 92382cef9f90..770c0f007c6b 100644
> --- a/drivers/clk/samsung/clk-exynos5420.c
> +++ b/drivers/clk/samsung/clk-exynos5420.c
> @@ -1356,8 +1356,6 @@ static void __init exynos5x_clk_init(struct device_node *np,
>  	exynos5x_soc = soc;
>  
>  	ctx = samsung_clk_init(np, reg_base, CLK_NR_CLKS);
> -	if (!ctx)
> -		panic("%s: unable to allocate context.\n", __func__);
>

Indeed, the check is superfluous. I see that most callers [0] currently
do the same, so probably makes sense to remove those too in this patch.

Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>

[0]:
drivers/clk/samsung/clk-exynos4.c
drivers/clk/samsung/clk-exynos5250.c
drivers/clk/samsung/clk-exynos5440.c
drivers/clk/samsung/clk-s3c2410.c
drivers/clk/samsung/clk-s3c2412.c
drivers/clk/samsung/clk-s3c2443.c
drivers/clk/samsung/clk-s3c64xx.c
drivers/clk/samsung/clk-s5pv210.c

Best regards,
-- 
Javier Martinez Canillas
Open Source Group
Samsung Research America

Re: [PATCH] clk: samsung: exynos5420: Remove useless check for return value of samsung_clk_init

[Krzysztof Kozlowski]

On Mon, May 09, 2016 at 09:32:47AM -0400, Javier Martinez Canillas wrote:
> Hello Krzysztof,
> 
> On 05/08/2016 05:24 AM, Krzysztof Kozlowski wrote:
> > The samsung_clk_init() cannot return NULL. Either it returns allocated
> > memory or it panics.
> > 
> > Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
> > ---
> >  drivers/clk/samsung/clk-exynos5420.c | 2 --
> >  1 file changed, 2 deletions(-)
> > 
> > diff --git a/drivers/clk/samsung/clk-exynos5420.c b/drivers/clk/samsung/clk-exynos5420.c
> > index 92382cef9f90..770c0f007c6b 100644
> > --- a/drivers/clk/samsung/clk-exynos5420.c
> > +++ b/drivers/clk/samsung/clk-exynos5420.c
> > @@ -1356,8 +1356,6 @@ static void __init exynos5x_clk_init(struct device_node *np,
> >  	exynos5x_soc = soc;
> >  
> >  	ctx = samsung_clk_init(np, reg_base, CLK_NR_CLKS);
> > -	if (!ctx)
> > -		panic("%s: unable to allocate context.\n", __func__);
> >
> 
> Indeed, the check is superfluous. I see that most callers [0] currently
> do the same, so probably makes sense to remove those too in this patch.
> 
> Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>

Thanks, I'll change this everywhere.


Best regards,
Krzysztof