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-rw-r--r--drivers/usb/core/message.c12
1 files changed, 7 insertions, 5 deletions
diff --git a/drivers/usb/core/message.c b/drivers/usb/core/message.c
index 2f6009b0cff..08fb20f06f3 100644
--- a/drivers/usb/core/message.c
+++ b/drivers/usb/core/message.c
@@ -1388,11 +1388,13 @@ free_interfaces:
if (dev->state != USB_STATE_ADDRESS)
usb_disable_device (dev, 1); // Skip ep0
- i = dev->bus_mA - cp->desc.bMaxPower * 2;
- if (i < 0)
- dev_warn(&dev->dev, "new config #%d exceeds power "
- "limit by %dmA\n",
- configuration, -i);
+ if (cp) {
+ i = dev->bus_mA - cp->desc.bMaxPower * 2;
+ if (i < 0)
+ dev_warn(&dev->dev, "new config #%d exceeds power "
+ "limit by %dmA\n",
+ configuration, -i);
+ }
if ((ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
USB_REQ_SET_CONFIGURATION, 0, configuration, 0,