From 0aeccdfe220c360ab888816da06b8eb67d910ff6 Mon Sep 17 00:00:00 2001 From: Bart Van Assche Date: Fri, 17 Mar 2017 17:02:03 -0700 Subject: [PATCH] scsi: scsi_dh_alua: Warn if the first argument of alua_rtpg_queue() is NULL Callers must provide a valid port group to alua_rtpg_queue(). Issue a kernel warning if that is not the case. Signed-off-by: Bart Van Assche Cc: Hannes Reinecke Cc: Tang Junhui Reviewed-by: Hannes Reinecke Signed-off-by: Martin K. Petersen --- drivers/scsi/device_handler/scsi_dh_alua.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/scsi/device_handler/scsi_dh_alua.c b/drivers/scsi/device_handler/scsi_dh_alua.c index b6849d3ecefe..c01b47e5b55a 100644 --- a/drivers/scsi/device_handler/scsi_dh_alua.c +++ b/drivers/scsi/device_handler/scsi_dh_alua.c @@ -876,7 +876,7 @@ static bool alua_rtpg_queue(struct alua_port_group *pg, unsigned long flags; struct workqueue_struct *alua_wq = kaluad_wq; - if (!pg || scsi_device_get(sdev)) + if (WARN_ON_ONCE(!pg) || scsi_device_get(sdev)) return false; spin_lock_irqsave(&pg->lock, flags);