Remove all direct comparisons to 'NULL' for pointers.
Replace them with boolean-like 'if (ptr)' and 'if (!ptr)'.
This makes conditions shorter and easier to read.
Signed-off-by: Alexander Amelkin <alexander@amelkin.msk.ru>
Make code better readable by replacing `if (rsp->ccode > 0)`
and 'if (rsp->ccode != 0)' with just `if (rsp->ccode)` as
rsp->ccode is anyway an unsigned byte and can't be negative.
Also replace 'if (rsp->ccode == 0)' with 'if (!rsp->ccode)'.
All these changes make lines shorter and easier to read as
a non-zero ccode is an indication of some failure, and so !ccode
naturally reads as 'no error'.
Signed-off-by: Alexander Amelkin <alexander@amelkin.msk.ru>
Bug 325 was associated with identification of DDR4 SDRAM, but correct decoding
logic was necessary to actually support DDR4 decode. This commit adds the
necessary logic to decode and display DDR4 DIMMS.
Commit replaces size decoding code with code ported from "decode-dimms" Perl
script found in i2c-tools 3.0.3. Former code has reported incorrect size of DDR2
modules.
Patch-by: Alexander Amelkin
