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Commit e2a1b79f authored by Devin Heitmueller's avatar Devin Heitmueller Committed by Mauro Carvalho Chehab
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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: default avatarDevin Heitmueller <dheitmueller@kernellabs.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent 0f9fba31

drivers/media/video/em28xx/em28xx-cards.c

+6 −1
Original line number Diff line number Diff line
@@ -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");