use_clustering (sht) bit set to 0 in AHCI ?

ahci: enable sg segment clustering

The specification states that ahci supports segments up to 4MiB in size,
so enable clustering.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index ca5229d24d8ed8f0692b64afed88d8e14cfbac33..f55c9e746b7384b47096eedafbea48cd604a57e1 100644 (file)
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -54,7 +54,7 @@ enum {
        AHCI_MAX_PORTS          = 32,
        AHCI_MAX_SG             = 168, /* hardware max is 64K */
        AHCI_DMA_BOUNDARY       = 0xffffffff,
-       AHCI_USE_CLUSTERING     = 0,
+       AHCI_USE_CLUSTERING     = 1,
        AHCI_MAX_CMDS           = 32,
        AHCI_CMD_SZ             = 32,
        AHCI_CMD_SLOT_SZ        = AHCI_MAX_CMDS * AHCI_CMD_SZ,