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[ Upstream commit a8065af3346ebd7c76ebc113451fb3ba94cf7769 ] According to USB4 specification, if E2E flow control is disabled for the Transmit Descriptor Ring, the Host Interface Adapter Layer shall not require any credits to be available before transmitting a Tunneled Packet from this Transmit Descriptor Ring, so e2e flow control should be enabled in both directions. Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com> Link: https://lore.kernel.org/20250624153805.GC2824380@black.fi.intel.com Signed-off-by: zhangjianrong <zhangjianrong5@huawei.com> Link: https://patch.msgid.link/20250628093813.647005-1-zhangjianrong5@huawei.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.