On 03/27/2014 11:14 AM, Christoph Hellwig wrote:
> +static void scsi_release_bidi_buffers(struct scsi_cmnd *cmd)
> +{
> + struct scsi_data_buffer *bidi_sdb = cmd->request->next_rq->special;
> +
> + scsi_free_sgtable(bidi_sdb);
> + kmem_cache_free(scsi_sdb_cache, bidi_sdb);
> + cmd->request->next_rq->special = NULL;
> +}
> +
> /**
> * __scsi_error_from_host_byte - translate SCSI error code into errno
> * @cmd: SCSI command (unused)
> @@ -800,6 +792,7 @@ void scsi_io_completion(struct scsi_cmnd *cmd, unsigned
> int good_bytes)
> req->next_rq->resid_len = scsi_in(cmd)->resid;
>
> scsi_release_buffers(cmd);
> + scsi_release_bidi_buffers(cmd);
> blk_end_request_all(req, 0);
>
> scsi_next_command(cmd);
>
Hey,
I just wanted to double check that the only time we do bidi requests is
when they come through as REQ_TYPE_BLOCK_PC requests. I saw some of the
code comments on the init side that indicated that, but there was that
scsi_end_request() -> scsi_release_buffers() -> __scsi_release_buffers()
call which then did not make sense because we were passing in 1 for the
bidi check argument.
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