linux-kernel - RE: [PATCH RESEND] ARM: pxa: fix error handling in pxa2xx_drv_pcmcia

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Date:	Tue, 27 Dec 2011 01:18:59 -0800
From:	Haojian Zhuang <hzhuang1@...vell.com>
To:	Eric Miao <eric.y.miao@...il.com>, Axel Lin <axel.lin@...il.com>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Russell King <linux@....linux.org.uk>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-pcmcia@...ts.infradead.org" <linux-pcmcia@...ts.infradead.org>
Subject: RE: [PATCH RESEND] ARM: pxa: fix error handling in
 pxa2xx_drv_pcmcia_probe


________________________________________
From: Eric Miao [eric.y.miao@...il.com]
Sent: Tuesday, December 27, 2011 5:11 PM
To: Axel Lin
Cc: linux-kernel@...r.kernel.org; Haojian Zhuang; Russell King; linux-arm-kernel@...ts.infradead.org; linux-pcmcia@...ts.infradead.org
Subject: Re: [PATCH RESEND] ARM: pxa: fix error handling in pxa2xx_drv_pcmcia_probe

On Tue, Dec 27, 2011 at 4:25 PM, Axel Lin <axel.lin@...il.com> wrote:
> If pxa2xx_drv_pcmcia_add_one fails, it will go to err1 error path.
> Add a missing clk_put in the error path.
>
> Checking the ret value after the for loop is redundant, it is always false.
> Thus remove the redundant checking.
>
> Signed-off-by: Axel Lin <axel.lin@...il.com>

Acked-by: Eric Miao <eric.y.miao@...il.com>

> ---
>  drivers/pcmcia/pxa2xx_base.c |   12 +++---------
>  1 files changed, 3 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/pcmcia/pxa2xx_base.c b/drivers/pcmcia/pxa2xx_base.c
> index a87e272..64d433e 100644
> --- a/drivers/pcmcia/pxa2xx_base.c
> +++ b/drivers/pcmcia/pxa2xx_base.c
> @@ -328,21 +328,15 @@ static int pxa2xx_drv_pcmcia_probe(struct platform_device *dev)
>                        goto err1;
>        }
>
> -       if (ret) {
> -               while (--i >= 0)
> -                       soc_pcmcia_remove_one(&sinfo->skt[i]);
> -               kfree(sinfo);
> -               clk_put(clk);
> -       } else {
> -               pxa2xx_configure_sockets(&dev->dev);
> -               dev_set_drvdata(&dev->dev, sinfo);
> -       }
> +       pxa2xx_configure_sockets(&dev->dev);
> +       dev_set_drvdata(&dev->dev, sinfo);
>
>        return 0;
>
>  err1:
>        while (--i >= 0)
>                soc_pcmcia_remove_one(&sinfo->skt[i]);
> +       clk_put(clk);
>        kfree(sinfo);
>  err0:
>        return ret;
> --
> 1.7.5.4
>
>
>
Wait a minute.

The original code will check whether pxa2xx_drv_pcmcia_add_one() successful. If it fails, we'll remove all devices that we registered.

But Axel removed these code. Why?

Thanks
Haojian
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