On 01/25/2012 04:35 PM, Alan Stern wrote:
In the diagram in UASP_rev1.0 in "5.4.3 Data-in transfer" the deviceis
waiting for in-ack (DATA-in). So I think the device has to wait until
the data is sent to the host. So that might be enough buffer to avoid
the race you were talking about.
You should not depend on this. However, the uas driver should not
consider an unlinked data URB to indicate an error -- even if
actual_length is 0.
The UAS driver sets the scsi status to whatever the device set it in
its status/sense reply. So you might receive no error and no data
according to the race mentioned by Sarah.
Alan Stern
Sebastian
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