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Alan Stern authored
commit 3f2cee73 upstream. The usbfs API has a peculiar hole: Users are not allowed to reap their URBs after the device has been disconnected. There doesn't seem to be any good reason for this; it is an ad-hoc inconsistency. The patch allows users to issue the USBDEVFS_REAPURB and USBDEVFS_REAPURBNDELAY ioctls (together with their 32-bit counterparts on 64-bit systems) even after the device is gone. If no URBs are pending for a disconnected device then the ioctls will return -ENODEV rather than -EAGAIN, because obviously no new URBs will ever be able to complete. The patch also adds a new capability flag for USBDEVFS_GET_CAPABILITIES to indicate that the reap-after-disconnect feature is supported. Signed-off-by:
Alan Stern <stern@rowland.harvard.edu> Tested-by:
Chris Dickens <christopher.a.dickens@gmail.com> Acked-by:
Hans de Goede <hdegoede@redhat.com> Signed-off-by:
Greg Kroah-Hartman <greg@kroah.com> Signed-off-by:
Luis Henriques <luis.henriques@canonical.com>
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