Kai Makisara wrote:
On Tue, 20 Sep 2005, Kai Makisara wrote:
...
If I try 5121 kB, write fails as is expected but not completely nicely.
Here are some test printks:
scsi_req_map_sg: q->back_merge failed, i=10
st 1:0:5:0: extraneous data discarded.
st 1:0:5:0: COMMAND FAILED (87 0 1).
sym: cmd: 0x0a 0x00 0x50 0x04 0x00 0x00
st: cmd=0x0a result=0x70000 resid=0 sense[0]=0x00 sense[2]=0x00
scsi_req_map_sg fails as it should but still a bogus SCSI command is sent.
I think the reason for this is simple but I don't want to delay the good
news by trying to debug this.
The reason was simple: scsi_req_map_sg did not set err when q->back_merge
failed. The patch at the end fixes the problem (I am not sure what would
be the correct error code).
yeah :) thanks.
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