linux-kernel - [PATCH] ibmvfc: fix missing cast of ibmvfc

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Message-Id: <20210106203721.1054693-1-tyreld@linux.ibm.com>
Date:   Wed,  6 Jan 2021 14:37:21 -0600
From:   Tyrel Datwyler <tyreld@...ux.ibm.com>
To:     james.bottomley@...senpartnership.com
Cc:     martin.petersen@...cle.com, linux-scsi@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
        brking@...ux.ibm.com, Tyrel Datwyler <tyreld@...ux.ibm.com>,
        kernel test robot <lkp@...el.com>
Subject: [PATCH] ibmvfc: fix missing cast of ibmvfc_event pointer to u64 handle

Commit 2aa0102c6688 ("scsi: ibmvfc: Use correlation token to tag
commands") sets the vfcFrame correlation token to the pointer handle of
the associated ibmvfc_event. However, that commit failed to cast the
pointer to an appropriate type which in this case is a u64. As such
sparse warnings are generated for both correlation token assignments.

 ibmvfc.c:2375:36: sparse: incorrect type in argument 1 (different base types)
 ibmvfc.c:2375:36: sparse: expected unsigned long long [usertype] val
 ibmvfc.c:2375:36: sparse: got struct ibmvfc_event *[assigned] evt

Add the apporpriate u64 casts when assigning an ibmvfc_event as a
correlation token.

Fixes: Commit 2aa0102c6688 ("scsi: ibmvfc: Use correlation token to tag commands")
Reported-by: kernel test robot <lkp@...el.com>
Signed-off-by: Tyrel Datwyler <tyreld@...ux.ibm.com>
---
 drivers/scsi/ibmvscsi/ibmvfc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/scsi/ibmvscsi/ibmvfc.c b/drivers/scsi/ibmvscsi/ibmvfc.c
index 42e4d35e0d35..7312f31df878 100644
--- a/drivers/scsi/ibmvscsi/ibmvfc.c
+++ b/drivers/scsi/ibmvscsi/ibmvfc.c
@@ -1744,7 +1744,7 @@ static int ibmvfc_queuecommand_lck(struct scsi_cmnd *cmnd,
 		iu->pri_task_attr = IBMVFC_SIMPLE_TASK;
 	}
 
-	vfc_cmd->correlation = cpu_to_be64(evt);
+	vfc_cmd->correlation = cpu_to_be64((u64)evt);
 
 	if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev))))
 		return ibmvfc_send_event(evt, vhost, 0);
@@ -2418,7 +2418,7 @@ static int ibmvfc_abort_task_set(struct scsi_device *sdev)
 		tmf->flags = cpu_to_be16((IBMVFC_NO_MEM_DESC | IBMVFC_TMF));
 		evt->sync_iu = &rsp_iu;
 
-		tmf->correlation = cpu_to_be64(evt);
+		tmf->correlation = cpu_to_be64((u64)evt);
 
 		init_completion(&evt->comp);
 		rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
-- 
2.27.0