Patch "Fix Express lane queue creation." has been added to the 4.9-stable tree

Patch "Fix Express lane queue creation." has been added to the 4.9-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    Fix Express lane queue creation.

to the 4.9-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     fix-express-lane-queue-creation.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Thu Mar 22 14:40:23 CET 2018
From: James Smart <jsmart2021@gmail.com>
Date: Fri, 21 Apr 2017 16:05:05 -0700
Subject: Fix Express lane queue creation.

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;
 


Patches currently in stable-queue which might be from jsmart2021@gmail.com are

queue-4.9/fix-driver-usage-of-128b-wqes-when-wq_create-is-v1.patch
queue-4.9/fix-express-lane-queue-creation.patch