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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Dick Kennedy <dick.kennedy@broadcom.com>,
        James Smart <james.smart@broadcom.com>,
        Johannes Thumshirn <jthumshirn@suse.de>,
        Sasha Levin <alexander.levin@microsoft.com>
Subject: [PATCH 4.9 056/177] Fix Express lane queue creation.
Date:   Fri, 23 Mar 2018 10:53:04 +0100
Message-Id: <20180323094207.820786672@linuxfoundation.org>
In-Reply-To: <20180323094205.090519271@linuxfoundation.org>
References: <20180323094205.090519271@linuxfoundation.org>
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4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: James Smart <jsmart2021@gmail.com>


[ Upstream commit 7e04e21afa82ef024416f5413b5bdb66e0505bcd ]

The older sli4 adapters only supported the 64 byte WQE entry size.
The new adapter (fw) support both 64 and 128 byte WQE entry sizies.
The Express lane WQ was not being created with the 128 byte WQE sizes
when it was supported.

Not having the right WQE size created for the express lane work queue
caused the the firmware to overwrite the lun indentifier in the FCP header.

This patch correctly creates the express lane work queue with the
supported size.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <james.smart@broadcom.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/scsi/lpfc/lpfc_init.c |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

--- a/drivers/scsi/lpfc/lpfc_init.c
+++ b/drivers/scsi/lpfc/lpfc_init.c
@@ -11312,6 +11312,7 @@ int
 lpfc_fof_queue_create(struct lpfc_hba *phba)
 {
 	struct lpfc_queue *qdesc;
+	uint32_t wqesize;
 
 	/* Create FOF EQ */
 	qdesc = lpfc_sli4_queue_alloc(phba, phba->sli4_hba.eq_esize,
@@ -11332,8 +11333,11 @@ lpfc_fof_queue_create(struct lpfc_hba *p
 		phba->sli4_hba.oas_cq = qdesc;
 
 		/* Create OAS WQ */
-		qdesc = lpfc_sli4_queue_alloc(phba, phba->sli4_hba.wq_esize,
+		wqesize = (phba->fcp_embed_io) ?
+				LPFC_WQE128_SIZE : phba->sli4_hba.wq_esize;
+		qdesc = lpfc_sli4_queue_alloc(phba, wqesize,
 					      phba->sli4_hba.wq_ecount);
+
 		if (!qdesc)
 			goto out_error;