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V4L/DVB (11927): em28xx: provide module option to disable USB speed check 

Add an em28xx module option that allows a user to override the USB speed check.
Intended for advanced users who understand the consequences of trying to use
the device with a 12Mbps bus.

Signed-off-by: Devin Heitmueller <dheitmueller@kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Devin Heitmueller 2009-05-27 23:44:10 -03:00 committed by Mauro Carvalho Chehab
parent 0f9fba3129
commit e2a1b79f7d
1 changed files with 6 additions and 1 deletions
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7
drivers/media/video/em28xx/em28xx-cards.c
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@ -49,6 +49,11 @@ static unsigned int disable_ir;
module_param(disable_ir, int, 0444);
MODULE_PARM_DESC(disable_ir, "disable infrared remote support");
static unsigned int disable_usb_speed_check;
module_param(disable_usb_speed_check, int, 0444);
MODULE_PARM_DESC(disable_usb_speed_check,
"override min bandwidth requirement of 480M bps");
static unsigned int card[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
module_param_array(card, int, NULL, 0444);
MODULE_PARM_DESC(card, "card type");
@ -2371,7 +2376,7 @@ static int em28xx_usb_probe(struct usb_interface *interface,
* video stream wouldn't likely work, since 12 Mbps is generally
* not enough even for most Digital TV streams.
*/
if (udev->speed != USB_SPEED_HIGH) {
if (udev->speed != USB_SPEED_HIGH && disable_usb_speed_check == 0) {
printk(DRIVER_NAME ": Device initialization failed.\n");
printk(DRIVER_NAME ": Device must be connected to a high-speed"
" USB 2.0 port.\n");