linux-kernel - Re: [PATCH 06/16] nuc900fb: don't treat NULL clk as an error

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Message-ID: <AANLkTingg+wm8jy4kRL=ubLFrCDXq17jZQkD3v3M4h+Y@mail.gmail.com>
Date:	Wed, 12 Jan 2011 09:24:47 +0800
From:	Wan ZongShun <mcuos.com@...il.com>
To:	Jamie Iles <jamie@...ieiles.com>
Cc:	linux-kernel@...r.kernel.org, linux-fbdev@...r.kernel.org,
	linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 06/16] nuc900fb: don't treat NULL clk as an error

2011/1/11 Jamie Iles <jamie@...ieiles.com>:
> clk_get() returns a struct clk cookie to the driver and some platforms
> may return NULL if they only support a single clock.  clk_get() has only
> failed if it returns a ERR_PTR() encoded pointer.
>
> Cc: Wan ZongShun <mcuos.com@...il.com>
> Cc: linux-fbdev@...r.kernel.org
> Signed-off-by: Jamie Iles <jamie@...ieiles.com>
> ---
>  drivers/video/nuc900fb.c |    5 +++--
>  1 files changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/video/nuc900fb.c b/drivers/video/nuc900fb.c
> index 81687ed..62498bd 100644
> --- a/drivers/video/nuc900fb.c
> +++ b/drivers/video/nuc900fb.c
> @@ -15,6 +15,7 @@
>  */
>  #include <linux/module.h>
>  #include <linux/kernel.h>
> +#include <linux/err.h>
>  #include <linux/errno.h>
>  #include <linux/string.h>
>  #include <linux/mm.h>
> @@ -597,9 +598,9 @@ static int __devinit nuc900fb_probe(struct platform_device *pdev)
>        }
>
>        fbi->clk = clk_get(&pdev->dev, NULL);
> -       if (!fbi->clk || IS_ERR(fbi->clk)) {
> +       if (IS_ERR(fbi->clk)) {
>                printk(KERN_ERR "nuc900-lcd:failed to get lcd clock source\n");
> -               ret = -ENOENT;
> +               ret = PTR_ERR(fbi->clk);
>                goto release_irq;
>        }
>
Hi,

Thanks for your patch.

Acked-by: Wan ZongShun <mcuos.com@...il.com>

> --
> 1.7.3.4
>
>

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