linux-kernel - Re: [PATCH] staging: comedi: ii_pci20kc: fix usage of uninit scalar in ii20k

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Date:	Sun, 4 May 2014 11:16:48 +0100
From:	Ian Abbott <abbotti@....co.uk>
To:	Christian Engelmayer <cengelma@....at>,
	<devel@...verdev.osuosl.org>
CC:	<hsweeten@...ionengravers.com>, <gregkh@...uxfoundation.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] staging: comedi: ii_pci20kc: fix usage of uninit scalar
 in ii20k_attach()

On 04/05/14 01:26, Christian Engelmayer wrote:
> This driver supports the PCI-20001C-1a and PCI-20001C-2a carrier boards.
> The -2a version has 32 on-board DIO channels. In case this variant is
> detected, local variable 'has_dio' is set accordingly. Otherwise it is
> left uninitialized and the following subdevice instantiation depends on
> the stack. Detected by Coverity - CID 1077830.
>
> Signed-off-by: Christian Engelmayer <cengelma@....at>
> ---
> Compile tested and applies against branch staging-next of tree
> git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git
> ---
>   drivers/staging/comedi/drivers/ii_pci20kc.c | 1 +
>   1 file changed, 1 insertion(+)
>
> diff --git a/drivers/staging/comedi/drivers/ii_pci20kc.c b/drivers/staging/comedi/drivers/ii_pci20kc.c
> index 3558ab3..2516ce8 100644
> --- a/drivers/staging/comedi/drivers/ii_pci20kc.c
> +++ b/drivers/staging/comedi/drivers/ii_pci20kc.c
> @@ -461,6 +461,7 @@ static int ii20k_attach(struct comedi_device *dev,
>   	id = readb(devpriv->ioaddr + II20K_ID_REG);
>   	switch (id & II20K_ID_MASK) {
>   	case II20K_ID_PCI20001C_1A:
> +		has_dio = false;
>   		break;
>   	case II20K_ID_PCI20001C_2A:
>   		has_dio = true;
>

Thanks¬

Reviewed-by: Ian Abbott <abbotti@....co.uk>

-- 
-=( Ian Abbott @ MEV Ltd.    E-mail: <abbotti@....co.uk>        )=-
-=( Tel: +44 (0)161 477 1898   FAX: +44 (0)161 718 3587         )=-
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