linux-kernel - [PATCH 4.14 40/45] scsi: aacraid: Correct hba_send to include iu

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Date:   Fri, 18 May 2018 10:15:57 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Noah Misner <nmisner@...ibm.com>,
        Dave Carroll <david.carroll@...rosemi.com>,
        Raghava Aditya Renukunta 
        <RaghavaAditya.Renukunta@...rosemi.com>,
        Brian King <brking@...ux.vnet.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>
Subject: [PATCH 4.14 40/45] scsi: aacraid: Correct hba_send to include iu_type

4.14-stable review patch.  If anyone has any objections, please let me know.

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

From: Dave Carroll <david.carroll@...rosemi.com>

commit 7d3af7d96af7b9f51e1ef67b6f4725f545737da2 upstream.

commit b60710ec7d7a ("scsi: aacraid: enable sending of TMFs from
aac_hba_send()") allows aac_hba_send() to send scsi commands, and TMF
requests, but the existing code only updates the iu_type for scsi
commands. For TMF requests we are sending an unknown iu_type to
firmware, which causes a fault.

Include iu_type prior to determining the validity of the command

Reported-by: Noah Misner <nmisner@...ibm.com>
Fixes: b60710ec7d7ab ("aacraid: enable sending of TMFs from aac_hba_send()")
Fixes: 423400e64d377 ("aacraid: Include HBA direct interface")
Tested-by: Noah Misner <nmisner@...ibm.com>
cc: stable@...r.kernel.org
Signed-off-by: Dave Carroll <david.carroll@...rosemi.com>
Reviewed-by: Raghava Aditya Renukunta <RaghavaAditya.Renukunta@...rosemi.com>
Reviewed-by: Brian King <brking@...ux.vnet.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@...cle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/scsi/aacraid/commsup.c |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

--- a/drivers/scsi/aacraid/commsup.c
+++ b/drivers/scsi/aacraid/commsup.c
@@ -752,6 +752,8 @@ int aac_hba_send(u8 command, struct fib
 	int wait;
 	unsigned long flags = 0;
 	unsigned long mflags = 0;
+	struct aac_hba_cmd_req *hbacmd = (struct aac_hba_cmd_req *)
+			fibptr->hw_fib_va;

 	fibptr->flags = (FIB_CONTEXT_FLAG | FIB_CONTEXT_FLAG_NATIVE_HBA);
 	if (callback) {
@@ -762,11 +764,9 @@ int aac_hba_send(u8 command, struct fib
 		wait = 1;

-	if (command == HBA_IU_TYPE_SCSI_CMD_REQ) {
-		struct aac_hba_cmd_req *hbacmd =
-			(struct aac_hba_cmd_req *)fibptr->hw_fib_va;
+	hbacmd->iu_type = command;

-		hbacmd->iu_type = command;
+	if (command == HBA_IU_TYPE_SCSI_CMD_REQ) {
 		/* bit1 of request_id must be 0 */
 		hbacmd->request_id =
 			cpu_to_le32((((u32)(fibptr - dev->fibs)) << 2) + 1);