[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>

diff --git a/drivers/scsi/libata-scsi.c b/drivers/scsi/libata-scsi.c
index 096bdffbde11ab8ec250b56a1d6cc06d55ff6cc0..234e1cadb070db1b5a26dcba693a1d884d5281d4 100644 (file)
--- 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 cbbc821fe22c6a2213b8900f9bc3c53ab207a19a..a6d829cb0567c70b589aa06756b57834db10c00b 100644 (file)
--- 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 */