ibmvscsis: Fix max transfer length

commit 387b978cb0d12cf3720ecb17e652e0a9991a08e2 upstream.

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

Reported-by: Steven Royer <seroyer@linux.vnet.ibm.com>
Tested-by: Steven Royer <seroyer@linux.vnet.ibm.com>
Signed-off-by: Bryant G. Ly <bryantly@linux.vnet.ibm.com>
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c b/drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c
index c5dd3e0b67eb3d93fe7029f0de861ff362180380..e3b911c895b4a3c1a8da6473eae22ff4136f13d9 100644 (file)
--- 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;
 
@@ -1291,7 +1292,7 @@ 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,