From: Oliver Neukum <oliver@xxxxxxxxxx>
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@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>
---
drivers/usb/misc/berry_charge.c | 5 +++++
1 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/drivers/usb/misc/berry_charge.c b/drivers/usb/misc/berry_charge.c
index 24e2dc3..c05a85b 100644
--- a/drivers/usb/misc/berry_charge.c
+++ b/drivers/usb/misc/berry_charge.c
@@ -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);
--
1.6.0.4
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