On Tue, 2008-02-26 at 10:48 +0100, Mike Galbraith wrote:
> Greetings,
>
> I straced both a good and a bad kernel (good being .git with attached
> revert patch applied) and filtered/diffed/merged the output. Scroll
> down to "HERE" to see the problem (resid).
>
> I'm poking around, but not having much luck.
Seems the problem is data_len changes, but raw_data_len doesn't. I've
not the foggiest IO-land clue, but k3b works again, so the below may
have some diagnostic value.
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index ba21d97..7a6f784 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -871,7 +871,7 @@ void scsi_io_completion(struct scsi_cmnd *cmd, unsigned int
good_bytes)
scsi_end_bidi_request(cmd);
return;
}
- req->data_len = scsi_get_resid(cmd);
+ req->data_len = req->raw_data_len = scsi_get_resid(cmd);
}
BUG_ON(blk_bidi_rq(req)); /* bidi not support for !blk_pc_request yet */
-Mike
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