diff options
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/core/hub.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index 1b1846e6473..89ebe6a23a9 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -1176,6 +1176,7 @@ static int choose_configuration(struct usb_device *udev) { int i; int num_configs; + int insufficient_power = 0; struct usb_host_config *c, *best; best = NULL; @@ -1228,8 +1229,10 @@ static int choose_configuration(struct usb_device *udev) */ /* Rule out configs that draw too much bus current */ - if (c->desc.bMaxPower * 2 > udev->bus_mA) + if (c->desc.bMaxPower * 2 > udev->bus_mA) { + insufficient_power++; continue; + } /* If the first config's first interface is COMM/2/0xff * (MSFT RNDIS), rule it out unless Linux has host-side @@ -1263,6 +1266,11 @@ static int choose_configuration(struct usb_device *udev) best = c; } + if (insufficient_power > 0) + dev_info(&udev->dev, "rejected %d configuration%s " + "due to insufficient available bus power\n", + insufficient_power, plural(insufficient_power)); + if (best) { i = best->desc.bConfigurationValue; dev_info(&udev->dev, |