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e7121ab405
Those files are meant to be dual GPL 2.0 and GFDL without implicit sections. However, by a wrong cut-and-paste, I ended by applying a GPL 2+ license text to it, while still using the GPL 2.0 SPDX tag, with would cause an ambiguity about the licensing model. Solve this by explicitly mentioning that the dual licensing is between GPL 2.0 and GFDL and correcting the text. Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
76 lines
2.4 KiB
ReStructuredText
76 lines
2.4 KiB
ReStructuredText
.. This file is dual-licensed: you can use it either under the terms
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.. of the GPL 2.0 or the GFDL 1.1+ license, at your option. Note that this
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.. dual licensing only applies to this file, and not this project as a
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.. whole.
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..
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.. a) This file is free software; you can redistribute it and/or
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.. modify it under the terms of the GNU General Public License as
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.. published by the Free Software Foundation version 2 of
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.. the License.
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..
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.. This file is distributed in the hope that it will be useful,
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.. but WITHOUT ANY WARRANTY; without even the implied warranty of
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.. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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.. GNU General Public License for more details.
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..
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.. Or, alternatively,
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..
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.. b) Permission is granted to copy, distribute and/or modify this
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.. document under the terms of the GNU Free Documentation License,
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.. Version 1.1 or any later version published by the Free Software
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.. Foundation, with no Invariant Sections, no Front-Cover Texts
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.. and no Back-Cover Texts. A copy of the license is included at
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.. Documentation/media/uapi/fdl-appendix.rst.
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..
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.. TODO: replace it to GPL-2.0 OR GFDL-1.1-or-later WITH no-invariant-sections
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.. _media_request_ioc_reinit:
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******************************
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ioctl MEDIA_REQUEST_IOC_REINIT
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******************************
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Name
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====
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MEDIA_REQUEST_IOC_REINIT - Re-initialize a request
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Synopsis
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========
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.. c:function:: int ioctl( int request_fd, MEDIA_REQUEST_IOC_REINIT )
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:name: MEDIA_REQUEST_IOC_REINIT
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Arguments
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=========
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``request_fd``
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File descriptor returned by :ref:`MEDIA_IOC_REQUEST_ALLOC`.
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Description
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===========
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If the media device supports :ref:`requests <media-request-api>`, then
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this request ioctl can be used to re-initialize a previously allocated
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request.
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Re-initializing a request will clear any existing data from the request.
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This avoids having to :ref:`close() <request-func-close>` a completed
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request and allocate a new request. Instead the completed request can just
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be re-initialized and it is ready to be used again.
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A request can only be re-initialized if it either has not been queued
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yet, or if it was queued and completed. Otherwise it will set ``errno``
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to ``EBUSY``. No other error codes can be returned.
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Return Value
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============
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On success 0 is returned, on error -1 and the ``errno`` variable is set
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appropriately.
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EBUSY
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The request is queued but not yet completed.
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