ed5672d82c
Although it doesn't look like it is possible to hit these conditions
from user space, there are 2 separate, but related, issues.
First, the ocelot_vcap_block_get_filter_index function, née
ocelot_ace_rule_get_index_id prior to the aae4e500e106 ("net: mscc:
ocelot: generalize the "ACE/ACL" names") rename, does not do what the
author probably intended. If the desired filter entry is not present in
the ACL block, this function returns an index equal to the total number
of filters, instead of -1, which is maybe what was intended, judging
from the curious initialization with -1, and the "++index" idioms.
Either way, none of the callers seems to expect this behavior.
Second issue, the callers don't actually check the return value at all.
So in case the filter is not found in the rule list, propagate the
return code.
So update the callers and also take the opportunity to get rid of the
odd coding idioms that appear to work but don't.
Signed-off-by: Xiaoliang Yang <xiaoliang.yang_1@nxp.com>
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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.