Staging: comedi: fix read past end of array in cb_pcidda_attach()

There are only 6 elements in the cb_pcidda_boards[] array so the
original code read past the end.  After this change nothing uses N_BOARDS
so I removed the definition.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/staging/comedi/drivers/cb_pcidda.c b/drivers/staging/comedi/drivers/cb_pcidda.c
index 81829d6fd2878bb07f2ca53caf2c11f050aee533..c374bee250687597a8c196e8a8823b44f2ea3aaa 100644 (file)
--- a/drivers/staging/comedi/drivers/cb_pcidda.c
+++ b/drivers/staging/comedi/drivers/cb_pcidda.c
@@ -52,7 +52,6 @@ Please report success/failure with other different cards to
 #include "8255.h"
 
 #define PCI_VENDOR_ID_CB       0x1307  /*  PCI vendor number of ComputerBoards */
-#define N_BOARDS       10      /*  Number of boards in cb_pcidda_boards */
 #define EEPROM_SIZE    128     /*  number of entries in eeprom */
 #define MAX_AO_CHANNELS 8      /*  maximum number of ao channels for supported boards */
 
@@ -307,7 +306,7 @@ static int cb_pcidda_attach(struct comedi_device *dev,
                                        continue;
                                }
                        }
-                       for (index = 0; index < N_BOARDS; index++) {
+                       for (index = 0; index < ARRAY_SIZE(cb_pcidda_boards); index++) {
                                if (cb_pcidda_boards[index].device_id ==
                                    pcidev->device) {
                                        goto found;