[PATCH] libata: add ATA_QCFLAG_IO

Add a new qc flag ATA_QCFLAG_IO.  This flag gets set for normal IO
commands originating from SCSI midlayer.  This information will be
used by EH to determine transfer speed reconfiguration.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

2 files changed, 3 insertions, 1 deletions

diff --git a/drivers/scsi/libata-scsi.c b/drivers/scsi/libata-scsi.c
index 096bdffbde11..234e1cadb070 100644
--- a/drivers/scsi/libata-scsi.c
+++ b/drivers/scsi/libata-scsi.c
@@ -1188,6 +1188,7 @@ static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, const u8 *scsicm
         u64 block;
         u32 n_block;
 
+        qc->flags |= ATA_QCFLAG_IO;
         tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
 
         if (scsicmd[0] == WRITE_10 || scsicmd[0] == WRITE_6 ||
diff --git a/include/linux/libata.h b/include/linux/libata.h
index cbbc821fe22c..a6d829cb0567 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -161,7 +161,8 @@ enum {
         ATA_QCFLAG_SG           = (1 << 1), /* have s/g table? */
         ATA_QCFLAG_SINGLE       = (1 << 2), /* no s/g, just a single buffer */
         ATA_QCFLAG_DMAMAP       = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE,
-        ATA_QCFLAG_EH_SCHEDULED = (1 << 3), /* EH scheduled */
+        ATA_QCFLAG_IO           = (1 << 3), /* standard IO command */
+        ATA_QCFLAG_EH_SCHEDULED = (1 << 4), /* EH scheduled */
 
         /* host set flags */
         ATA_HOST_SIMPLEX        = (1 << 0),     /* Host is simplex, one DMA channel per host_set only */