From 909ee499c1c85e99ed3f9e99caf13a89f4de3d3a Mon Sep 17 00:00:00 2001
From: Steffen Maier <maier@linux.vnet.ibm.com>
Date: Thu, 22 Aug 2013 17:49:34 +0200
Subject: [PATCH] [SCSI] zfcp: enable FCP hardware data router by default
Enabling the data router support by default
can increase performance in certain situations.
It is safe to do so and tolerated in LPAR and under z/VM
in case there is no data router support in that environment.
Signed-off-by: Steffen Maier <maier@linux.vnet.ibm.com>
Reviewed-by: Martin Peschke <mpeschke@linux.vnet.ibm.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
---
drivers/s390/scsi/zfcp_qdio.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/s390/scsi/zfcp_qdio.c b/drivers/s390/scsi/zfcp_qdio.c
index 665e3cfaaf85d5..f84fc1c348529a 100644
--- a/drivers/s390/scsi/zfcp_qdio.c
+++ b/drivers/s390/scsi/zfcp_qdio.c
@@ -16,9 +16,9 @@
#define QBUFF_PER_PAGE (PAGE_SIZE / sizeof(struct qdio_buffer))
-static bool enable_multibuffer;
+static bool enable_multibuffer = 1;
module_param_named(datarouter, enable_multibuffer, bool, 0400);
-MODULE_PARM_DESC(datarouter, "Enable hardware data router support");
+MODULE_PARM_DESC(datarouter, "Enable hardware data router support (default on)");
static int zfcp_qdio_buffers_enqueue(struct qdio_buffer **sbal)
{
--
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