linux-kernel - Re: [patch 6/7] ps3: ROM Storage Driver

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Date:	Tue, 29 May 2007 18:21:36 +0200 (CEST)
From:	Geert Uytterhoeven <Geert.Uytterhoeven@...ycom.com>
To:	Christoph Hellwig <hch@....de>
cc:	linuxppc-dev@...abs.org, linux-kernel@...r.kernel.org,
	linux-scsi@...r.kernel.org
Subject: Re: [patch 6/7] ps3: ROM Storage Driver

On Tue, 29 May 2007, Christoph Hellwig wrote:
> > +/*
> > + * copy data from device into scatter/gather buffer
> > + */
> > +static int fill_from_dev_buffer(struct scsi_cmnd *cmd, const void *buf,
> > +				int buflen)
> > +{
> > +	int k, req_len, act_len, len, active;
> > +	void *kaddr;
> > +	struct scatterlist *sgpnt;
> > +
> > +	if (!cmd->request_bufflen)
> > +		return 0;
> > +
> > +	if (!cmd->request_buffer)
> > +		return DID_ERROR << 16;
> > +
> > +	if (cmd->sc_data_direction != DMA_BIDIRECTIONAL &&
> > +	    cmd->sc_data_direction != DMA_FROM_DEVICE)
> > +		return DID_ERROR << 16;
> > +
> > +	if (!cmd->use_sg) {
> > +		req_len = cmd->request_bufflen;
> > +		act_len = min(req_len, buflen);
> > +		memcpy(cmd->request_buffer, buf, act_len);
> > +		cmd->resid = req_len - act_len;
> > +		return 0;
> > +	}
> 
> This is never true anymore.

Just to be sure: all four if-cases or only the last one?

Gr{oetje,eeting}s,

						Geert

--
Geert Uytterhoeven -- Sony Network and Software Technology Center Europe (NSCE)
Geert.Uytterhoeven@...ycom.com ------- The Corporate Village, Da Vincilaan 7-D1
Voice +32-2-7008453 Fax +32-2-7008622 ---------------- B-1935 Zaventem, Belgium
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