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The maxpacksize field in struct audioformat represents the maximum number of bytes per isochronous interval. The current implementation only special-cases high-speed endpoints and does not account for the different computations required for SuperSpeed, SuperSpeedPlus, or eUSB2. As a result, USB audio class devices operating at these speeds may fail to stream correctly. The issue was observed on a MOTU 16A (2025) interface, which requires more than 1024 bytes per interval at SuperSpeed. This patch replaces the existing logic with a helper that computes the correct maximum bytes-per-interval for all USB speeds, borrowing the logic used in drivers/usb/core/urb.c. Signed-off-by: Dylan Robinson <dylan_robinson@motu.com> Link: https://patch.msgid.link/20251124210518.90054-1-dylan_robinson@motu.com Signed-off-by: Takashi Iwai <tiwai@suse.de>
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 reStructuredText 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.