On Tue, Sep 10 2002, Martin Knoblauch wrote:
> Hi,
>
> I am getting a reproducable Oops+Aiee when trying to mount a ATAPI
> CDROM via the ide-scsi interface under 2.4.20-pre5-ac4. Works OK
> without ide-scsi.
Ok, the problem is that ide-scsi builds a request which eventually ends
up going through the ide code dma mapping. ide_build_sglist() does a
rq_data_dir() on the request, which BUG()'s if the command isn't an fs
read or write. This actually went undetected before, because the ide
code did:
if (rq->cmd == READ)
direction is dma from device
else
direction is to device
and rq->cmd is IDESCSI_PC_RQ in this case. So we always mapped for dma
to the device, even if that wasn't the case.
Hmm, maybe just adding a single direction bit to struct request is the
easy way out for 2.4. Or... I'll cook something up.
-- Jens Axboe- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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