[SCSI] libsas: fix usage of ata_tf_to_fis
authorDan Williams <dan.j.williams@intel.com>
Wed, 23 Oct 2013 01:35:19 +0000 (18:35 -0700)
committerJames Bottomley <JBottomley@Parallels.com>
Wed, 27 Nov 2013 07:01:07 +0000 (11:01 +0400)
Since commit 110dd8f19df5 "[SCSI] libsas: fix scr_read/write users and
update the libata documentation" we have been passing pmp=1 and is_cmd=0
to ata_tf_to_fis().  Praveen reports that eSATA attached drives do not
discover correctly.  His investigation found that the BIOS was passing
pmp=0 while Linux was passing pmp=1 and failing to discover the drives.
Update libsas to follow the libata example of pulling the pmp setting
from the ata_link and correct is_cmd to be 1 since all tf's submitted
through ->qc_issue are commands.  Presumably libsas lldds do not care
about is_cmd as they have sideband mechanisms to perform link
management.

http://marc.info/?l=linux-scsi&m=138179681726990

[jejb: checkpatch fix]
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Reported-by: Praveen Murali <pmurali@logicube.com>
Tested-by: Praveen Murali <pmurali@logicube.com>
Cc: stable@vger.kernel.org
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
drivers/scsi/libsas/sas_ata.c

index 161c98efade9b9f290c04588e4638df0f3c421ac..d2895836f9fa4c00fec1a46d993074ecb3edeaea 100644 (file)
@@ -211,7 +211,7 @@ static unsigned int sas_ata_qc_issue(struct ata_queued_cmd *qc)
                qc->tf.nsect = 0;
        }
 
-       ata_tf_to_fis(&qc->tf, 1, 0, (u8*)&task->ata_task.fis);
+       ata_tf_to_fis(&qc->tf, qc->dev->link->pmp, 1, (u8 *)&task->ata_task.fis);
        task->uldd_task = qc;
        if (ata_is_atapi(qc->tf.protocol)) {
                memcpy(task->ata_task.atapi_packet, qc->cdb, qc->dev->cdb_len);