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scsi: megaraid_sas: set pd_after_lb from MR_BuildRaidContext and initialize pDevHandle to MR_DEVHANDLE_INVALID 

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>
This commit is contained in:
Shivasharan S 2017-02-10 00:59:24 -08:00 committed by Martin K. Petersen
parent 95c060869e
commit b41c0a4aa7
1 changed files with 4 additions and 4 deletions
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8
drivers/scsi/megaraid/megaraid_sas_fp.c
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@ -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;
}