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[ Upstream commit 2b217514436744dd98c4d9fa48d60610f9f67d61 ] There is no need to check against kfifo_len() before kfifo_out(). Just ask the latter for data and it tells how much it retrieved. Or returns 0 in case there are no more. Signed-off-by: Jiri Slaby (SUSE) <jirislaby@kernel.org> Cc: Mathias Nyman <mathias.nyman@intel.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: linux-usb@vger.kernel.org Link: https://lore.kernel.org/r/20240808103549.429349-5-jirislaby@kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Stable-dep-of: 30c9ae5ece8e ("xhci: dbc: honor usb transfer size boundaries.") 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.