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[ Upstream commit b5ae5a79825ba8037b0be3ef677a24de8c063abf ] This driver passes the length of an i2c_msg directly to usb_control_msg(). If the message is now a read and of length 0, it violates the USB protocol and a warning will be printed. Enable the I2C_AQ_NO_ZERO_LEN_READ quirk for this adapter thus forbidding 0-length read messages altogether. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> 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.