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Staging: comedi: Added some validation of comedi module parameter values. 

Cc: Ian Abbott <abbotti@mev.co.uk>
Cc: David Schleef <ds@schleef.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Frank Mori Hess 2008-12-15 13:44:45 +00:00 committed by Greg Kroah-Hartman
parent 4c41f3ae3b
commit a3cb729ef4
2 changed files with 16 additions and 1 deletions
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16
drivers/staging/comedi/comedi_fops.c
View File

@ -1911,6 +1911,22 @@ static int __init comedi_init(void)
printk(KERN_INFO "comedi: version " COMEDI_RELEASE
" - http://www.comedi.org\n");
if (comedi_num_legacy_minors < 0 ||
comedi_num_legacy_minors > COMEDI_NUM_BOARD_MINORS) {
printk(KERN_ERR "comedi: error: invalid value for module "
"parameter \"comedi_num_legacy_minors\". Valid values "
"are 0 through %i.\n", COMEDI_NUM_BOARD_MINORS);
return -EINVAL;
}
/*
* comedi is unusable if both comedi_autoconfig and
* comedi_num_legacy_minors are zero, so we might as well adjust the
* defaults in that case
*/
if (comedi_autoconfig == 0 && comedi_num_legacy_minors == 0)
comedi_num_legacy_minors = 16;
memset(comedi_file_info_table, 0,
sizeof(struct comedi_device_file_info *) * COMEDI_NUM_MINORS);

1
drivers/staging/comedi/comedidev.h
View File

@ -119,7 +119,6 @@
#define PCI_VENDOR_ID_MEILHAUS 0x1402
#define COMEDI_NUM_MINORS 0x100
#define COMEDI_NUM_LEGACY_MINORS 0x10
#define COMEDI_NUM_BOARD_MINORS 0x30
#define COMEDI_FIRST_SUBDEVICE_MINOR COMEDI_NUM_BOARD_MINORS