From a14aeccb65e5dacdd8b47eafc2778b1bfce8978b Mon Sep 17 00:00:00 2001 From: "Bryant G. Ly" Date: Wed, 11 Jan 2017 13:52:27 -0600 Subject: [PATCH] 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 Tested-by: Steven Royer Signed-off-by: Bryant G. Ly Signed-off-by: Bart Van Assche Signed-off-by: Greg Kroah-Hartman --- 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 c5dd3e0b67eb..e3b911c895b4 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; @@ -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, -- 2.39.5