On Thu, Feb 07, 2013 at 02:38:32PM -0700, Dave Jiang wrote: > There is a race that can hit during __cleanup() when the ioat->head pointer is > incremented during descriptor submission. The __cleanup() can clear the > PENDING flag when it does not see any active descriptors. This causes new > submitted descriptors to be ignored because the COMPLETION_PENDING flag is > cleared. This was introduced when code was adapted from ioatdma v1 to ioatdma > v2. For v2 and v3, IOAT_COMPLETION_PENDING flag will be abandoned and a new > flag IOAT_CHAN_ACTIVE will be utilized. This flag will also be protected under > the prep_lock when being modified in order to avoid the race. > > Signed-off-by: Dave Jiang <[email protected]> > Reviewed-by: Dan Williams <[email protected]> Applied, thanks
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