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USB: power availability check for berry_charge

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this introduces a sanity check into berry_charge to give up before
damage is done if we lack juice.

Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Oliver Neukum 2008-02-01 22:44:40 +01:00 committed by Greg Kroah-Hartman
parent ff8973d946
commit b404299f6b
1 changed files with 5 additions and 0 deletions
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5
drivers/usb/misc/berry_charge.c
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@ -123,6 +123,11 @@ static int berry_probe(struct usb_interface *intf,
{
struct usb_device *udev = interface_to_usbdev(intf);
if (udev->bus_mA < 500) {
dbg(&udev->dev, "Not enough power to charge available\n");
return -ENODEV;
}
dbg(&udev->dev, "Power is set to %dmA\n",
udev->actconfig->desc.bMaxPower * 2);