On Fri, Jun 19, 2015 at 09:50:37PM -0400, John Snow wrote:
> @@ -1003,6 +1003,27 @@ static void process_ncq_command(AHCIState *s, int port, uint8_t *cmd_fis,
>                     (uint64_t)ncq_fis->lba0;
>      ncq_tfs->tag = tag;
>  
> +#ifdef DEBUG_AHCI

These sorts of debug ifdefs have a tendency to bitrot since the code
isn't compiled.

There is no need for the ifdef since DPRINTF() is deadcode when DEBUG_AHCI
is 0.  The compiler parses the code, preventing bitrot, but optimizes
the code away when DEBUG_ACHI is 0.