From b41c0a4aa7c0fc1f98648c020358598498d48f06 Mon Sep 17 00:00:00 2001 From: Shivasharan S Date: Fri, 10 Feb 2017 00:59:24 -0800 Subject: [PATCH] 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 Signed-off-by: Shivasharan S Reviewed-by: Hannes Reinecke Reviewed-by: Tomas Henzl Signed-off-by: Martin K. Petersen --- drivers/scsi/megaraid/megaraid_sas_fp.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/scsi/megaraid/megaraid_sas_fp.c b/drivers/scsi/megaraid/megaraid_sas_fp.c index 68582d9..a5517e7 100644 --- 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; } -- 2.7.4