[PATCH 1/3] UBUNTU: SAUCE: ibmvscsis: Fix max transfer length

[Tim Gardner]

From: "Bryant G. Ly" <bryantly at linux.vnet.ibm.com>

BugLink: http://bugs.launchpad.net/bugs/1657194

Current code incorrectly calculates the max transfer length, since
it is assuming a 4k page table, but ppc64 all run on 64k page tables.

Cc: stable at vger.kernel.org
Reported-by: Steven Royer <seroyer at linux.vnet.ibm.com>
Tested-by: Steven Royer <seroyer at linux.vnet.ibm.com>
Signed-off-by: Bryant G. Ly <bryantly at linux.vnet.ibm.com>
Signed-off-by: Tim Gardner <tim.gardner at canonical.com>
---
 drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c b/drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c
index 4456fa4..dbb4bed 100644
--- a/drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c
+++ b/drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c
@@ -45,6 +45,7 @@
 
 #define	INITIAL_SRP_LIMIT	800
 #define	DEFAULT_MAX_SECTORS	256
+#define MAX_TXU			1024 * 1024
 
 static uint max_vdma_size = MAX_H_COPY_RDMA;
 
@@ -1442,7 +1443,7 @@ static long ibmvscsis_adapter_info(struct scsi_info *vscsi,
 	info->mad_version = cpu_to_be32(MAD_VERSION_1);
 	info->os_type = cpu_to_be32(LINUX);
 	memset(&info->port_max_txu[0], 0, sizeof(info->port_max_txu));
-	info->port_max_txu[0] = cpu_to_be32(128 * PAGE_SIZE);
+	info->port_max_txu[0] = cpu_to_be32(MAX_TXU);
 
 	dma_wmb();
 	rc = h_copy_rdma(sizeof(*info), vscsi->dds.window[LOCAL].liobn,
-- 
2.7.4