tree 8b239f45ef127cda349548477396404a5fde53ca
parent e26395d1786fd3c146ac08252285471c39f0460c
author Patrick Venture <venture@google.com> 1572450567 -0700
committer Patrick Venture <venture@google.com> 1572450567 -0700

frudevice: cast to unsigned, avoid negative values

The FRU device contents are stored in a character vector, and this
includes some numbers.  The values that can be numbers (the offsets),
can be 255 (0xff), and this when promoted to an int becomes -1.  By
casting the value to an unsigned type first, we then get promoted to
255.

Tested: This patchset has not been explicitly tested as I have no test
systems with an offset of 255 in the tables, but the specification for
IPMI FRU permits this value.

Signed-off-by: Patrick Venture <venture@google.com>
Change-Id: I186798840d674b4c1cf5a3905eb606add331ec74