Re: Di-30 non working [bug 967]

[Andrew Morton <akpm@osdl.org>]

Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl> wrote:
>
> Noticed by Stuart_Hayes@Dell.com:
> 
> I've noticed that, in the 2.6 (test 9) kernel, the "cmd" field (of type int)
> in struct request has been removed, and it looks like all of the code in
> ide-tape has just had a find & replace run on it to replace any instance of
> rq.cmd or rq->cmd with rq.flags or rq->flags.

Nasty.

> @@ -193,6 +193,11 @@ enum rq_flag_bits {
>  	__REQ_PM_SUSPEND,	/* suspend request */
>  	__REQ_PM_RESUME,	/* resume request */
>  	__REQ_PM_SHUTDOWN,	/* shutdown request */
> +	__REQ_IDETAPE_PC1,	/* packet command (first stage) */
> +	__REQ_IDETAPE_PC2,	/* packet command (second stage) */
> +	__REQ_IDETAPE_READ,
> +	__REQ_IDETAPE_WRITE,
> +	__REQ_IDETAPE_READ_BUFFER,
>  	__REQ_NR_BITS,		/* stops here */
>  };

This takes us up to about 28 flags; we'll run out soon.

Probably it is time to split this into generic and private flags, as we did
with bh_state_bits.  The scope of the "private" section needs to be
defined: maybe "whoever created the queue"?

blk_dump_rq_flags() will need updating.  Probably change it to only decode
the "generic" flags, and print "bit XX" for the remainders.

Your patch forgot to update rq_flags[] btw.