An UNMAP command on a PI formatted device will leave the Logical Block Application Tag and Logical Block Reference Tag as all F's (for those LBAs that are unmapped). To avoid IO errors if those LBAs are subsequently read before they are written with valid tag fields, the MPI SCSI IO requests need to set the EEDPFlags element EEDP Escape Mode field, Bits [7:6] appropriately. A value of 2 should be set to disable all PI checks if the Logical Block Application Tag is 0xFFFF for PI types 1 and 2. A value of 3 should be set to disable all PI checks if the Logical Block Application Tag is 0xFFFF and the Logical Block Reference Tag is 0xFFFFFFFF for PI type 3. Signed-off-by: Chaitra P B <chaitra.basappa@xxxxxxxxxxxx> Signed-off-by: Sathya Prakash <sathya.prakash@xxxxxxxxxxxx> Signed-off-by: Suganath Prabu S <suganath-prabu.subramani@xxxxxxxxxxxx> Reviewed-by: Hannes Reinecke <hare@xxxxxxxx> Reviewed-by: Tomas Henzl <thenzl@xxxxxxxxxx> --- drivers/scsi/mpt3sas/mpt3sas_scsih.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/scsi/mpt3sas/mpt3sas_scsih.c b/drivers/scsi/mpt3sas/mpt3sas_scsih.c index a1c541d..c58f326 100644 --- a/drivers/scsi/mpt3sas/mpt3sas_scsih.c +++ b/drivers/scsi/mpt3sas/mpt3sas_scsih.c @@ -3989,6 +3989,9 @@ _scsih_setup_eedp(struct MPT3SAS_ADAPTER *ioc, struct scsi_cmnd *scmd, mpi_request_3v->EEDPBlockSize = cpu_to_le16(scmd->device->sector_size); + + if (ioc->is_gen35_ioc) + eedp_flags |= MPI25_SCSIIO_EEDPFLAGS_APPTAG_DISABLE_MODE; mpi_request->EEDPFlags = cpu_to_le16(eedp_flags); } -- 2.4.3 -- 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
