staging: comedi: vmk80xx: remove "firmware version" kernel messages

During the attach of this driver a couple commands are sent to the hardware
with usb_bulk_msg() to read the firmware version information. This information
is then dumped as dev_info() kernel messages. Thee messages are just added
noise and don't effect the operation of the driver.

For simplicity, remove the messages as well as the then unused functions
vmk80xx_read_eeprom() and vmk80xx_check_data_link().

This also fixes an issue reported by coverity about an out-of-bounds write
in vmk80xx_read_eeprom().

Reported-by: coverity (CID 711413)
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/comedi/drivers/vmk80xx.c b/drivers/staging/comedi/drivers/vmk80xx.c
index e371183..a090668 100644 (file)
--- a/drivers/staging/comedi/drivers/vmk80xx.c
+++ b/drivers/staging/comedi/drivers/vmk80xx.c
@@ -103,11 +103,6 @@ enum vmk80xx_model {
        VMK8061_MODEL
 };
 
-struct firmware_version {
-       unsigned char ic3_vers[32];     /* USB-Controller */
-       unsigned char ic6_vers[32];     /* CPU */
-};
-
 static const struct comedi_lrange vmk8061_range = {
        2, {
                UNI_RANGE(5),
@@ -156,68 +151,12 @@ static const struct vmk80xx_board vmk80xx_boardinfo[] = {
 struct vmk80xx_private {
        struct usb_endpoint_descriptor *ep_rx;
        struct usb_endpoint_descriptor *ep_tx;
-       struct firmware_version fw;
        struct semaphore limit_sem;
        unsigned char *usb_rx_buf;
        unsigned char *usb_tx_buf;
        enum vmk80xx_model model;
 };
 
-static int vmk80xx_check_data_link(struct comedi_device *dev)
-{
-       struct vmk80xx_private *devpriv = dev->private;
-       struct usb_device *usb = comedi_to_usb_dev(dev);
-       unsigned int tx_pipe;
-       unsigned int rx_pipe;
-       unsigned char tx[1];
-       unsigned char rx[2];
-
-       tx_pipe = usb_sndbulkpipe(usb, 0x01);
-       rx_pipe = usb_rcvbulkpipe(usb, 0x81);
-
-       tx[0] = VMK8061_CMD_RD_PWR_STAT;
-
-       /*
-        * Check that IC6 (PIC16F871) is powered and
-        * running and the data link between IC3 and
-        * IC6 is working properly
-        */
-       usb_bulk_msg(usb, tx_pipe, tx, 1, NULL, devpriv->ep_tx->bInterval);
-       usb_bulk_msg(usb, rx_pipe, rx, 2, NULL, HZ * 10);
-
-       return (int)rx[1];
-}
-
-static void vmk80xx_read_eeprom(struct comedi_device *dev, int flag)
-{
-       struct vmk80xx_private *devpriv = dev->private;
-       struct usb_device *usb = comedi_to_usb_dev(dev);
-       unsigned int tx_pipe;
-       unsigned int rx_pipe;
-       unsigned char tx[1];
-       unsigned char rx[64];
-       int cnt;
-
-       tx_pipe = usb_sndbulkpipe(usb, 0x01);
-       rx_pipe = usb_rcvbulkpipe(usb, 0x81);
-
-       tx[0] = VMK8061_CMD_RD_VERSION;
-
-       /*
-        * Read the firmware version info of IC3 and
-        * IC6 from the internal EEPROM of the IC
-        */
-       usb_bulk_msg(usb, tx_pipe, tx, 1, NULL, devpriv->ep_tx->bInterval);
-       usb_bulk_msg(usb, rx_pipe, rx, 64, &cnt, HZ * 10);
-
-       rx[cnt] = '\0';
-
-       if (flag & IC3_VERSION)
-               strncpy(devpriv->fw.ic3_vers, rx + 1, 24);
-       else                    /* IC6_VERSION */
-               strncpy(devpriv->fw.ic6_vers, rx + 25, 24);
-}
-
 static void vmk80xx_do_bulk_msg(struct comedi_device *dev)
 {
        struct vmk80xx_private *devpriv = dev->private;
@@ -878,16 +817,6 @@ static int vmk80xx_auto_attach(struct comedi_device *dev,
 
        usb_set_intfdata(intf, devpriv);
 
-       if (devpriv->model == VMK8061_MODEL) {
-               vmk80xx_read_eeprom(dev, IC3_VERSION);
-               dev_info(&intf->dev, "%s\n", devpriv->fw.ic3_vers);
-
-               if (vmk80xx_check_data_link(dev)) {
-                       vmk80xx_read_eeprom(dev, IC6_VERSION);
-                       dev_info(&intf->dev, "%s\n", devpriv->fw.ic6_vers);
-               }
-       }
-
        if (devpriv->model == VMK8055_MODEL)
                vmk80xx_reset_device(dev);