mainlining shenanigans
1a3ddb0b75
This patch extends the br_mrp_switchdev functions to be able to have a better understanding what cause the issue and if the SW needs to be used as a backup. There are the following cases: - when the code is compiled without CONFIG_NET_SWITCHDEV. In this case return success so the SW can continue with the protocol. Depending on the function, it returns 0 or BR_MRP_SW. - when code is compiled with CONFIG_NET_SWITCHDEV and the driver doesn't implement any MRP callbacks. In this case the HW can't run MRP so it just returns -EOPNOTSUPP. So the SW will stop further to configure the node. - when code is compiled with CONFIG_NET_SWITCHDEV and the driver fully supports any MRP functionality. In this case the SW doesn't need to do anything. The functions will return 0 or BR_MRP_HW. - when code is compiled with CONFIG_NET_SWITCHDEV and the HW can't run completely the protocol but it can help the SW to run it. For example, the HW can't support completely MRM role(can't detect when it stops receiving MRP Test frames) but it can redirect these frames to CPU. In this case it is possible to have a SW fallback. The SW will try initially to call the driver with sw_backup set to false, meaning that the HW should implement completely the role. If the driver returns -EOPNOTSUPP, the SW will try again with sw_backup set to false, meaning that the SW will detect when it stops receiving the frames but it needs HW support to redirect the frames to CPU. In case the driver returns 0 then the SW will continue to configure the node accordingly. Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com> Signed-off-by: David S. Miller <davem@davemloft.net> |
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| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| 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.