From: Jens Axboe <jens.axboe@oracle.com>
Date: Tue, 22 May 2007 07:45:39 +0000 (+0200)
Subject: use_clustering (sht) bit set to 0 in AHCI ?
X-Git-Tag: v2.6.23-rc1~1152^2~23
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=be5d82183f1ebb022f923b008acf3b760d3a571d;p=linux-2.6

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 ca5229d24d..f55c9e746b 100644
--- 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,