8e7a1dbc7b
When a command ends up in a STALL on the control pipe, use the Request Error Code control to provide a more precise error information to the user. For example, if a camera is still busy processing a control, when the same or an interrelated control set request arrives, the camera can react with a STALL and then return the "Not ready" status in response to a UVC_VC_REQUEST_ERROR_CODE_CONTROL command. With this patch the user would then get an EBUSY error code instead of a generic EPIPE. Signed-off-by: Guennadi Liakhovetski <guennadi.liakhovetski@intel.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.