[PATCH RESEND 4/4] zfcp: enable FCP hardware data router by default

[Steffen Maier <maier@linux.vnet.ibm.com>]

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>
---
 drivers/s390/scsi/zfcp_qdio.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- 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)
 {