diff options
| author | Alan Stern <[email protected]> | 2015-01-29 11:29:13 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <[email protected]> | 2015-01-31 09:05:06 -0800 |
| commit | 3f2cee73b650921b2e214bf487b2061a1c266504 (patch) | |
| tree | d1dddbfd38a52fc0b66b7fca36dc8ad8efb671ca /tools/perf/scripts/python/syscall-counts-by-pid.py | |
| parent | 17136d4984b37d2a9acb67e1da1a3e95e3fed918 (diff) | |
USB: usbfs: allow URBs to be reaped after disconnection
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 <[email protected]>
Tested-by: Chris Dickens <[email protected]>
Acked-by: Hans de Goede <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/syscall-counts-by-pid.py')
0 files changed, 0 insertions, 0 deletions