tree 28ddbe9ec01367a7c66c4db39ae18f2af9a6f186
parent 8475e2336cf80ba6e7b27715b4b3214d73c211ab
author Paul Bolle <pebolle@tiscali.nl> 1312902988 +0200
committer Gustavo F. Padovan <padovan@profusion.mobi> 1313103025 -0300

Bluetooth: btusb: be quiet on device disconnect

Disabling the bluetooth usb device embedded in (some) ThinkPads tends to
lead to errors like these:
    btusb_bulk_complete: hci0 urb ffff88011b9bfd68 failed to resubmit (19)
    btusb_intr_complete: hci0 urb ffff88011b46a318 failed to resubmit (19)
    btusb_bulk_complete: hci0 urb ffff88011b46a000 failed to resubmit (19)

That is because usb_disconnect() doesn't "quiesces" pending urbs.

Disconnecting a device is a normal thing to happen so it's no big deal
that usb_submit_urb() returns -ENODEV. The simplest way to get rid of
these errors is to stop treating that return as an error. Trivial,
actually.

While we're at it, add comments to be explicit about the reasons we're
not complaining about -EPERM and -ENODEV.

Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>