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[ Upstream commitf317e2ea8c] When disable CBS, mode_to_use parameter is not updated even the operation mode of Tx Queue is changed to Data Centre Bridging (DCB). Therefore, when tc_setup_cbs() function is called to re-enable CBS, the operation mode of Tx Queue remains at DCB, which causing CBS fails to work. This patch updates the value of mode_to_use parameter to MTL_QUEUE_DCB after operation mode of Tx Queue is changed to DCB in stmmac_dma_qmode() callback function. Fixes:1f705bc61a("net: stmmac: Add support for CBS QDISC") Suggested-by: Vinicius Costa Gomes <vinicius.gomes@intel.com> Signed-off-by: Mohammad Athari Bin Ismail <mohammad.athari.ismail@intel.com> Signed-off-by: Song, Yoong Siang <yoong.siang.song@intel.com> Reviewed-by: Jesse Brandeburg <jesse.brandeburg@intel.com> Acked-by: Vinicius Costa Gomes <vinicius.gomes@intel.com> Link: https://lore.kernel.org/r/1612447396-20351-1-git-send-email-yoong.siang.song@intel.com Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
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.