[SCSI] megaraid_sas: Fix max_sectors for IEEE SGL

Signed-off-by: Adam Radford <aradford@gmail.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

2 files changed, 5 insertions, 0 deletions

diff --git a/drivers/scsi/megaraid/megaraid_sas.h b/drivers/scsi/megaraid/megaraid_sas.h
index e00ee4afdbc7..c782bbc57cc8 100644
--- a/drivers/scsi/megaraid/megaraid_sas.h
+++ b/drivers/scsi/megaraid/megaraid_sas.h
@@ -723,6 +723,7 @@ struct megasas_ctrl_info {
                                                 MEGASAS_MAX_DEV_PER_CHANNEL)
 
 #define MEGASAS_MAX_SECTORS                    (2*1024)
+#define MEGASAS_MAX_SECTORS_IEEE                (2*128)
 #define MEGASAS_DBG_LVL                         1
 
 #define MEGASAS_FW_BUSY                         1
diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c b/drivers/scsi/megaraid/megaraid_sas_base.c
index c9d82b56c6d7..960b88cb4ff6 100644
--- a/drivers/scsi/megaraid/megaraid_sas_base.c
+++ b/drivers/scsi/megaraid/megaraid_sas_base.c
@@ -3824,6 +3824,10 @@ static int megasas_io_attach(struct megasas_instance *instance)
                         instance->max_fw_cmds - MEGASAS_INT_CMDS;
         host->this_id = instance->init_id;
         host->sg_tablesize = instance->max_num_sge;
+
+        if (instance->fw_support_ieee)
+                instance->max_sectors_per_req = MEGASAS_MAX_SECTORS_IEEE;
+
         /*
          * Check if the module parameter value for max_sectors can be used
          */