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| author | Johan Hovold <johan@kernel.org> | 2017-03-17 11:35:30 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-09-23 08:44:24 +0200 |
| commit | 6c0359c083966ec7af79ff13d26accc12d13fc6f (patch) | |
| tree | dd676c7766b4b6513f17c6b398f19d98e2aa6ae9 /Documentation | |
| parent | 9b097a91eeea48cb8fd2bc57b6119af4b1f938f2 (diff) | |
USB: core: add helpers to retrieve endpoints
commit 66a359390e7e34f9a4c489467234b107b3d76169 upstream.
Many USB drivers iterate over the available endpoints to find required
endpoints of a specific type and direction. Typically the endpoints are
required for proper function and a missing endpoint should abort probe.
To facilitate code reuse, add a helper to retrieve common endpoints
(bulk or interrupt, in or out) and four wrappers to find a single
endpoint.
Note that the helpers are marked as __must_check to serve as a reminder
to always verify that all expected endpoints are indeed present. This
also means that any optional endpoints, typically need to be looked up
through separate calls.
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation')
0 files changed, 0 insertions, 0 deletions