5bcc37dc24
[ Upstream commit 71d46f1ff2212ced4852c7e77c5176382a1bdcec ]
The simple_write_to_buffer() function will return positive/success if it
is able to write a single byte anywhere within the buffer. However that
potentially leaves a lot of the buffer uninitialized.
In this code it's better to return 0 if the offset is non-zero. This
code is not written to support partial writes. And then return -EFAULT
if the buffer is not completely initialized.
Fixes: cfad6425382e ("eeprom: Add IDT 89HPESx EEPROM/CSR driver")
Reviewed-by: Serge Semin <fancer.lancer@gmail.com>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/Ysg1Pu/nzSMe3r1q@kili
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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.