linux-kernel - Re: [PATCH] staging: ft1000: ft1000-usb: ft1000

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Date:	Mon, 29 Dec 2014 12:16:39 +0530
From:	Sudip Mukherjee <sudipm.mukherjee@...il.com>
To:	Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>
Cc:	Marek Belisko <marek.belisko@...il.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Gulsah Kose <gulsah.1004@...il.com>,
	Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@...el.com>,
	Andrey Utkin <andrey.krieger.utkin@...il.com>,
	Monam Agarwal <monamagarwal123@...il.com>,
	devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] staging: ft1000: ft1000-usb: ft1000_hw.c:  Fix a
 potential memory leak.

On Sat, Dec 27, 2014 at 07:45:07PM +0100, Rickard Strandqvist wrote:
> Avoid allocate memory if we will exit the function.
> 
> Was found by using a static code analysis program called cppcheck.
> 
> Signed-off-by: Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>
> ---
>  drivers/staging/ft1000/ft1000-usb/ft1000_hw.c |    8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/staging/ft1000/ft1000-usb/ft1000_hw.c b/drivers/staging/ft1000/ft1000-usb/ft1000_hw.c
> index 2e13e7b..72b8f03 100644
> --- a/drivers/staging/ft1000/ft1000-usb/ft1000_hw.c
> +++ b/drivers/staging/ft1000/ft1000-usb/ft1000_hw.c
> @@ -331,15 +331,15 @@ int card_send_command(struct ft1000_usb *ft1000dev, void *ptempbuffer,
>  
>  	DEBUG("card_send_command: enter card_send_command... size=%d\n", size);

this is not applying to next-20141226. your tree is not a current one. This DEBUG line was changed by patch "b5d8204d00fa3bcd1f3b4b060fb90675d00baee0"

thanks
sudip

>  
> +	ret = ft1000_read_register(ft1000dev, &temp, FT1000_REG_DOORBELL);
> +	if (ret)
> +		return ret;
> +
>  	commandbuf = kmalloc(size + 2, GFP_KERNEL);
>  	if (!commandbuf)
>  		return -ENOMEM;
>  	memcpy((void *)commandbuf + 2, (void *)ptempbuffer, size);
>  
> -	ret = ft1000_read_register(ft1000dev, &temp, FT1000_REG_DOORBELL);
> -	if (ret)
> -		return ret;
> -
>  	if (temp & 0x0100)
>  		usleep_range(900, 1100);
>  
> -- 
> 1.7.10.4
> 
> --
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