linux-kernel - [PATCH AUTOSEL for 4.9 124/156] Ib/hfi1: Return actual operational VLs in port info query

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Message-ID: <20171207154845.4814-124-alexander.levin@verizon.com>
Date:   Thu, 7 Dec 2017 15:49:26 +0000
From:   alexander.levin@...izon.com
To:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>
Cc:     Patel Jay P <jay.p.patel@...el.com>,
        Dennis Dalessandro <dennis.dalessandro@...el.com>,
        Doug Ledford <dledford@...hat.com>, alexander.levin@...izon.com
Subject: [PATCH AUTOSEL for 4.9 124/156] Ib/hfi1: Return actual operational
 VLs in port info query

From: Patel Jay P <jay.p.patel@...el.com>

[ Upstream commit 00f9203119dd2774564407c7a67b17d81916298b ]

__subn_get_opa_portinfo stores value returned by hfi1_get_ib_cfg() as
operational vls. hfi1_get_ib_cfg() returns vls_operational field in
hfi1_pportdata. The problem with this is that the value is always equal
to vls_supported field in hfi1_pportdata.

The logic to calculate operational_vls is to set value passed by FM
(in  __subn_set_opa_portinfo routine). If no value is passed then
default value is stored in operational_vls.

Field actual_vls_operational is calculated on the basis of buffer
control table. Hence, modifying hfi1_get_ib_cfg() to return
actual_operational_vls when used with HFI1_IB_CFG_OP_VLS parameter

Reviewed-by: Mike Marciniszyn <mike.marciniszyn@...el.com>
Reviewed-by: Dennis Dalessandro <dennis.dalessandro@...el.com>
Signed-off-by: Patel Jay P <jay.p.patel@...el.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@...el.com>
Signed-off-by: Doug Ledford <dledford@...hat.com>
Signed-off-by: Sasha Levin <alexander.levin@...izon.com>
---
 drivers/infiniband/hw/hfi1/chip.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/infiniband/hw/hfi1/chip.c b/drivers/infiniband/hw/hfi1/chip.c
index 24d0820873cf..4682909b021b 100644
--- a/drivers/infiniband/hw/hfi1/chip.c
+++ b/drivers/infiniband/hw/hfi1/chip.c
@@ -9769,7 +9769,7 @@ int hfi1_get_ib_cfg(struct hfi1_pportdata *ppd, int which)
 		goto unimplemented;
 
 	case HFI1_IB_CFG_OP_VLS:
-		val = ppd->vls_operational;
+		val = ppd->actual_vls_operational;
 		break;
 	case HFI1_IB_CFG_VL_HIGH_CAP: /* VL arb high priority table size */
 		val = VL_ARB_HIGH_PRIO_TABLE_SIZE;
-- 
2.11.0