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There is a race condition during shutdown in adf_disable_sriov() where both the PF and the VF drivers are loaded on the host system. The PF notifies a VF with a "RESTARTING" message due to which the VF starts an asynchronous worker to stop and shutdown itself. At the same time the PF calls pci_disable_sriov() which invokes the remove() routine on the VF device driver triggering the shutdown flow again. This change fixes the problem by ensuring that the VF flushes the worker that performs stop()/shutdown() before these two functions are called in the remove(). To make sure that no additional PV/VF messages are processed by the VF, interrupts are disabled before flushing the workqueue. Signed-off-by: Ahsan Atta <ahsan.atta@intel.com> Co-developed-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com> Signed-off-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com> Reviewed-by: Fiona Trahe <fiona.trahe@intel.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> |
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| README | ||
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.