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DSA spec states that when Request Interrupt Handle and Release Interrupt Handle command bits are set in the CMDCAP register, these device commands must be supported by the driver. The interrupt handle is programmed in a descriptor. When Request Interrupt Handle is not supported, the interrupt handle is the index of the desired entry in the MSI-X table. When the command is supported, driver must use the command to obtain a handle to be programmed in the submitted descriptor. A requested handle may be revoked. After the handle is revoked, any use of the handle will result in Invalid Interrupt Handle error. Signed-off-by: Dave Jiang <dave.jiang@intel.com> Link: https://lore.kernel.org/r/161894439422.3202472.17579543737810265471.stgit@djiang5-desk3.ch.intel.com Signed-off-by: Vinod Koul <vkoul@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.
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.