Currently, the driver sets handshake status to tell the hardware that the driver have downed the netdev and it can continue with reset process. The driver will clear the handshake status when re-initializing the CMDQ, and does not recover this status when reset fail, which may cause the hardware to wait for the handshake status to be set and not being able to continue with reset process. So this patch delays clearing handshake status just before UP, and recovers this status when reset fail. BTW, this patch adds a new function hclge(vf)_reset_handshake() to deal with the reset handshake issue, and renames HCLGE(VF)_NIC_CMQ_ENABLE to HCLGE(VF)_NIC_SW_RST_RDY which represents this register bit more accurately. Fixes: ada13ee3db7b ("net: hns3: add handshake with hardware while doing reset") Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com> Reviewed-by: Peng Li <lipeng321@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.
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