From 186a18e51db08d51011fc4bd2aa773e173f632c9 Mon Sep 17 00:00:00 2001 From: Suganath Prabu Subramani Date: Wed, 26 Oct 2016 13:34:39 +0530 Subject: [PATCH] scsi: mpt3sas: set EEDP-escape-flags for SAS35 devices. 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 Signed-off-by: Sathya Prakash Signed-off-by: Suganath Prabu S Reviewed-by: Hannes Reinecke Reviewed-by: Tomas Henzl Signed-off-by: Martin K. Petersen --- 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); } -- 2.7.4