• Heiner Kallweit's avatar
    [media] media: rc: raw: improve FIFO handling · 464254e5
    Heiner Kallweit authored
    The FIFO is used for ir_raw_event records, however for some historic
    reason the FIFO is used on a per byte basis. IMHO this adds unneeded
    complexity. Therefore set up the FIFO for ir_raw_event records.
    
    This also allows to define the FIFO statically as part of
    ir_raw_event_ctrl instead of having to allocate the FIFO dynamically.
    In addition:
    
    - When writing into the FIFO and it's full return ENOSPC instead of
      ENOMEM thus making it easier to tell between "FIFO full" and
      "Dynamic memory allocation failed" when the error is propagated to
      a higher level.
      Also add an error message.
    
    - When reading from the FIFO check whether it's empty.
      This is not strictly needed here but kfifo_out is annotated
      "must check" anyway.
    
    Successfully tested it with the nuvoton-cir driver.
    Signed-off-by: default avatarHeiner Kallweit <hkallweit1@gmail.com>
    Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@osg.samsung.com>
    464254e5
rc-ir-raw.c 9.23 KB