Re: [PATCH] staging: comedi: ii_pci20kc: fix usage of uninit scalar in ii20k_attach()

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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@xxxxxx>
---
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@xxxxxxxxx>

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