This patch series improves the error handling and data integrity of 
_rtw_pktfile_read() by preventing unsafe partial reads and ensuring 
proper error propagation.

Previously, _rtw_pktfile_read() allowed partial reads when requested 
data was insufficient, which could lead to incomplete packet parsing 
and potential errors in callers. This series updates the function to 
only update internal pointers when a full read is successful, and 
updates all callers to handle the new error codes correctly.

I do not have the physical hardware to test this, so I have carefully 
reviewed every place where _rtw_pktfile_read() is used in this driver. 
I have also confirmed that the driver builds without any errors or 
warnings with these patches applied.

Changes since v4:
    - Split the single large patch into a 3-patch series as suggested by 
      Greg Kroah-Hartman to ensure each patch performs one logical task.

    - Patch 1: Refactor return type to 'int' and replace non-standard 'uint' 
      parameter with 'unsigned int' for better type consistency and to 
      prepare for error propagation.

    - Patch 2: Add missing error checks and update existing handlers to 
      correctly recognize negative error codes. This includes inserting 
      new checks after _rtw_pktfile_read() and updating existing 
      '== _FAIL' logic to '!= _SUCCESS' to ensure all failures are caught.

    - Patch 3: Implement the core logic to prevent partial reads and 
      return -EINVAL when data is insufficient.

-- 
2.43.0