Mark Lord wrote: >>> We may also want a patch to prevent libata-eh from downshifting >>> all the way to PIO on these chipsets, but I am not sure how to >>> accomplish that from inside sata_mv. Any suggestions? >> >> Do we really want that? Seems to me we need that for older bridged >> PATA devices attached to a SATA bridge. > .. > > Just about everything can do some form of DMA nowadays, > but regardless of that the sata_mv chipsets have errata > for PIO of anything more than a single sector. > > In practice, I haven't managed to trigger the issue here, > but the errata descriptions indicate that it should be a major > issue for any volume of multi-sector PIO commands. The following nack'd patch has something similar if it's really necessary. http://article.gmane.org/gmane.linux.ide/32282 -- tejun -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
