>>>>> "John" == John Garry <john.garry@xxxxxxxxxx> writes: John> This patchset introduces a workaround to a hw quirk in the John> HiSilicon SAS controller v2 hw. John> The quirk is as follows: When a SATA and SAS frame arrives at the John> host at the same time the frames may be swapped under this John> condition: SATA device id bit [10:0] == SAS frame IPTT bit [10:0] John> The workaround is to ensure these 2 values never match. The John> workaround algorithm is as follows: - SATA device id bit0 always 0 John> - SATA IPTT has no restriction - SAS IPTT bit0 always 1 - SAS John> device id has no restriction John> The major restriction of this workaround is the SAS IPTT range is John> halved, but this should be ok as testing has shown that even using John> half the IPTT range does not affect performance. Applied to 4.7/scsi-queue. Thanks! -- Martin K. Petersen Oracle Linux Engineering -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
