[dm-devel] Re: [PATCH 3/7] scsi_dh: add generic SPC-3 alua handler

[Hannes Reinecke <hare suse de>]

Chandra Seetharaman wrote:
> I do not know the functionality of this module. So, my comments are only
> related to code.
>
> blk_request_rq() frees up the request before it returns (in
> blk_end_sync_rq()). So, there is no need for blk_put_request().
Indeed. But this opens up another question:

By the time blk_execute_rq() returns, the request is already
put back onto the queue.
That means that I shouldn't access rq->errors any more, as
the request might have been reused already.
But blk_execute_rq() returns -EIO for any error, making it
impossible to signal a proper error here.
So how do I get the contents of rq->errors safely?

Cheers,

Hannes
--
Dr. Hannes Reinecke		      zSeries & Storage
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