libata: implement ATA_DFLAG_DUBIOUS_XFER
ATA_DFLAG_DUBIOUS_XFER is set whenever data transfer speed or method
changes and gets cleared when data transfer command succeeds in the
newly configured transfer mode.
This will be used to improve speed down logic.
Signed-off-by: Tejun Heo <htejun@gmail.com<
Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 74f1255..131fb66 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -143,6 +143,7 @@
ATA_DFLAG_NCQ_OFF = (1 << 13), /* device limited to non-NCQ mode */
ATA_DFLAG_SPUNDOWN = (1 << 14), /* XXX: for spindown_compat */
ATA_DFLAG_SLEEPING = (1 << 15), /* device is sleeping */
+ ATA_DFLAG_DUBIOUS_XFER = (1 << 16), /* data transfer not verified */
ATA_DFLAG_INIT_MASK = (1 << 24) - 1,
ATA_DFLAG_DETACH = (1 << 24),
@@ -560,6 +561,8 @@
int tries[ATA_MAX_DEVICES];
unsigned int classes[ATA_MAX_DEVICES];
unsigned int did_probe_mask;
+ unsigned int saved_ncq_enabled;
+ u8 saved_xfer_mode[ATA_MAX_DEVICES];
};
struct ata_acpi_drive