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staging: comedi: vmk80xx: zero buffers on allocation

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Zero out `devpriv->usb_tx_buf` and `devpriv->usb_rx_buf` on allocation.
When sending data to the USB device, this ensures any unused part of the
buffer will not contain random crap.

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ian Abbott 2013-02-14 16:42:13 +00:00 committed by Greg Kroah-Hartman
parent d489082ac6
commit 0cbfc8269b
1 changed files with 2 additions and 2 deletions
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4
drivers/staging/comedi/drivers/vmk80xx.c
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@ -994,12 +994,12 @@ static int vmk80xx_alloc_usb_buffers(struct comedi_device *dev)
size_t size;
size = le16_to_cpu(devpriv->ep_rx->wMaxPacketSize);
devpriv->usb_rx_buf = kmalloc(size, GFP_KERNEL);
devpriv->usb_rx_buf = kzalloc(size, GFP_KERNEL);
if (!devpriv->usb_rx_buf)
return -ENOMEM;
size = le16_to_cpu(devpriv->ep_tx->wMaxPacketSize);
devpriv->usb_tx_buf = kmalloc(size, GFP_KERNEL);
devpriv->usb_tx_buf = kzalloc(size, GFP_KERNEL);
if (!devpriv->usb_tx_buf) {
kfree(devpriv->usb_rx_buf);
return -ENOMEM;