f28368bb45
Currently, the actual work of VF FLR is handled in the reset task, which is asynchronous. So in some case, if the preparing and rebuilding are not done, then the VF FLR will trigger some problems, for example, makes hardware go into chaos. So this patch separates the process of VF FLR from reset task, and adds a semaphore to serialize this reset and others. When FLR's preparing fails, if there has other higher level reset pending or failing times less than the HCLGE_FLR_RETRY_CNT, this preparing should be retried, otherwise it will get into a wrong state. BTW, while the hardware reports misc interrupt during pcie_flr(), the driver can not receive this interrupt anymore, so disable it when hclgevf_flr_prepare() return, and re-enable it when enter hclgevf_flr_done(). Avoid declaring internal function hclgevf_enable_vector(), this patch also moves its definition forward, and removes unused enum hnae3_flr_state. Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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.