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3506832b09
Avoid a race where two (or more) commands get the same index: 1. T1 calls enqueue_hcmd and the local TFD index is assigned to txq->write_ptr; 2. Context switch 'before incrementing txq->write_ptr'; 3. T2 calls enqueue_hcmd and the local TFD index is assigned to txq->write_ptr; 4. Now the index is set to the same value for both commands of T1 and T2. To prevent this from happening, set the local TFD index inside the critical section (the index is set by global txq write pointer). Signed-off-by: Shaul Triebitz <shaul.triebitz@intel.com> Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
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.