Re: [PATCH] hptiop: HighPoint RocketRAID 3xxx controller driver

[James Bottomley <James.Bottomley@SteelEye.com>]

On Tue, 2006-05-16 at 14:38 +0800, HighPoint Linux Team wrote: 
	_req = get_req(hba);
	if (_req == NULL) {
		dprintk("hptiop_queuecmd : no free req\n");
		scp->result = DID_BUS_BUSY << 16;
		goto cmd_done;
	}

This should be doing a return SCSI_MLQUEUE_HOST_BUSY.  DID_BUS_BUSY
doesn't do the resource contention counting that you want
(MLQUEUE_HOST_BUSY will wait until a command returns ... presumably
freeing up resources before trying another).


	/*
	 * hptiop_shutdown will flash controller cache.
	 */
	if (scp->cmnd[0] == SYNCHRONIZE_CACHE)  {
		scp->result = DID_OK<<16;
		goto cmd_done;
	}

Are you really sure you want to do this?  It looks like we'll be doing
this in cases where shutdown won't be called (like suspend). 

	host->can_queue = le32_to_cpu(iop_config.max_requests);
	host->cmd_per_lun = le32_to_cpu(iop_config.max_requests);

You might want to think about adjusting this.  For the single LUN case,
it's fine.  For the multi-lun case it may allow commands to a single LUN
to starve everything else.

However, these are minor points ... I'll put the driver in and you can
fix them up later.

James