scsi: megaraid_sas: set pd_after_lb from MR_BuildRaidContext and initialize pDevHandl...

Issue is limited for Syncro firmware where pd_after_lb is not set but is
accidentally used.  Not a functional issue, but results in low
performance due to improper load balancing between two LUNs.

Signed-off-by: Kashyap Desai <kashyap.desai@broadcom.com>
Signed-off-by: Shivasharan S <shivasharan.srikanteshwara@broadcom.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/megaraid/megaraid_sas_fp.c b/drivers/scsi/megaraid/megaraid_sas_fp.c
index 68582d9..a5517e7 100644 (file)
--- a/drivers/scsi/megaraid/megaraid_sas_fp.c
+++ b/drivers/scsi/megaraid/megaraid_sas_fp.c
@@ -948,6 +948,7 @@ static u8 mr_spanset_get_phy_params(struct megasas_instance *instance, u32 ld,
        struct fusion_context *fusion;
 
        fusion = instance->ctrl_context;
+       *pDevHandle = cpu_to_le16(MR_DEVHANDLE_INVALID);
 
        /*Get row and span from io_info for Uneven Span IO.*/
        row         = io_info->start_row;
@@ -986,7 +987,6 @@ static u8 mr_spanset_get_phy_params(struct megasas_instance *instance, u32 ld,
                                MR_PdDevHandleGet(r1_alt_pd, map);
                }
        } else {
-               *pDevHandle = cpu_to_le16(MR_DEVHANDLE_INVALID);
                if ((raid->level >= 5) &&
                        ((fusion->adapter_type == THUNDERBOLT_SERIES)  ||
                        ((fusion->adapter_type == INVADER_SERIES) &&
@@ -1013,6 +1013,7 @@ static u8 mr_spanset_get_phy_params(struct megasas_instance *instance, u32 ld,
                        (span << RAID_CTX_SPANARM_SPAN_SHIFT) | physArm;
                io_info->span_arm = pRAID_Context->span_arm;
        }
+       io_info->pd_after_lb = pd;
        return retval;
 }
 
@@ -1049,7 +1050,7 @@ u8 MR_GetPhyParams(struct megasas_instance *instance, u32 ld, u64 stripRow,
        struct fusion_context *fusion;
 
        fusion = instance->ctrl_context;
-
+       *pDevHandle = cpu_to_le16(MR_DEVHANDLE_INVALID);
 
        row =  mega_div64_32(stripRow, raid->rowDataSize);
 
@@ -1102,8 +1103,6 @@ u8 MR_GetPhyParams(struct megasas_instance *instance, u32 ld, u64 stripRow,
                                        MR_PdDevHandleGet(r1_alt_pd, map);
                }
        } else {
-               /* set dev handle as invalid. */
-               *pDevHandle = cpu_to_le16(MR_DEVHANDLE_INVALID);
                if ((raid->level >= 5) &&
                        ((fusion->adapter_type == THUNDERBOLT_SERIES)  ||
                        ((fusion->adapter_type == INVADER_SERIES) &&
@@ -1132,6 +1131,7 @@ u8 MR_GetPhyParams(struct megasas_instance *instance, u32 ld, u64 stripRow,
                        (span << RAID_CTX_SPANARM_SPAN_SHIFT) | physArm;
                io_info->span_arm = pRAID_Context->span_arm;
        }
+       io_info->pd_after_lb = pd;
        return retval;
 }