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staging: vt6656: [BUG] iwctl_siwencodeext return if device not open

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Don't allow entry to iwctl_siwencodeext if device not open.

This fixes a race condition where wpa supplicant/network manager
enters the function when the device is already closed.

Signed-off-by: Malcolm Priestley <tvboxspy@gmail.com>
Cc: stable@vger.kernel.org # 3.8+
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Malcolm Priestley 2013-09-23 20:30:42 +01:00 committed by Greg Kroah-Hartman
parent e3eb270fab
commit 5e8c3d3e41
1 changed files with 3 additions and 0 deletions
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3
drivers/staging/vt6656/iwctl.c
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@ -1634,6 +1634,9 @@ int iwctl_siwencodeext(struct net_device *dev, struct iw_request_info *info,
if (pMgmt == NULL)
return -EFAULT;
if (!(pDevice->flags & DEVICE_FLAGS_OPENED))
return -ENODEV;
buf = kzalloc(sizeof(struct viawget_wpa_param), GFP_KERNEL);
if (buf == NULL)
return -ENOMEM;