• Jens Axboe's avatar
    [PATCH] Fix IDE bus reset and DMA disable when reading blank DVD-R · 314dc154
    Jens Axboe authored
    From Jon Burgess:
    
      There is a problems with blank DVD media using the ide-cd driver.
    
      When we attempt to read the blank disk, the drive responds to the read
      request by returning a "blank media" error.  The kernel doesn't have
      any special case handling for this sense value and retries the request
      a couple of times, then gives up and does a bus reset and disables DMA
      to the device.
    
      Which obviously doesn't help the situation.
    
      The sense key value of 8 isn't listed in ide-cd.h, but it is listed in
      scsi.h as a "BLANK_CHECK" error.
    
      This trivial patch treats this error condition as a reason to abort
      the request.  This behaviour is the same as what we do with a blank CD-R.
    
      It looks like the same fix might be desired for 2.4 as well, although
      is perhaps not so important since scsi-ide is normally used instead.
    314dc154
ide-cd.c 100 KB