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9a20b5e35a536d6bb4b2d4a3b14a0457e205356c
When i2c_smbus_read_i2c_block_data() fails, the read data in "buf" could be incorrect and should not be used. The fix checks if i2c_smbus_read_i2c_block_data fails, and if so, return its error code upstream. Signed-off-by: Kangjie Lu <kjlu@umn.edu> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
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.
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