Williams, Dan J wrote: > When continuing a pq calculation the driver needs 3 extra sources. The > driver can perform a 3 source calculation with a single descriptor, but > needs an extended descriptor to process up to 8 sources in one > operation. However, in the p-disabled case only one extra source is > needed. When continuing a p-disabled operation there are occasions > (i.e. 0 < src_cnt % 8 < 3) where the tail operation does not need an > extended descriptor. Properly account for this fact otherwise invalid > 'dmacount' values will be written to hardware usually causing the > channel to halt with 'invalid descriptor' errors. > > Cc: <stable@xxxxxxxxxx> > Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx> > --- Acked-by: Maciej Sosnowski <maciej.sosnowski@xxxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
