linux-kernel - [PATCH] scsi: pm8001: Drop !task check in pm8001_abort

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Message-ID: <1666781764-123090-1-git-send-email-john.garry@huawei.com>
Date:   Wed, 26 Oct 2022 18:56:04 +0800
From:   John Garry <john.garry@...wei.com>
To:     <jinpu.wang@...ud.ionos.com>, <jejb@...ux.ibm.com>,
        <martin.petersen@...cle.com>
CC:     <linux-scsi@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <damien.lemoal@...nsource.wdc.com>,
        John Garry <john.garry@...wei.com>
Subject: [PATCH] scsi: pm8001: Drop !task check in pm8001_abort_task()

In commit 0b639decf651 ("scsi: pm8001: Modify task abort handling for SATA
task"), code was introduced to dereference "task" pointer in
pm8001_abort_task(). However there was a pre-existing later check for
"!task", which spooked the kernel test robot.

Function pm8001_abort_task() should never be passed NULL for "task"
pointer, so remove that check. Also remove the "unlikely" hint, as this is
not fastpath code.

Reported-by: kernel test robot <lkp@...el.com>
Reported-by: Dan Carpenter <dan.carpenter@...cle.com>
Signed-off-by: John Garry <john.garry@...wei.com>

diff --git a/drivers/scsi/pm8001/pm8001_sas.c b/drivers/scsi/pm8001/pm8001_sas.c
index 2359e827c9e6..e5673c774f66 100644
--- a/drivers/scsi/pm8001/pm8001_sas.c
+++ b/drivers/scsi/pm8001/pm8001_sas.c
@@ -979,7 +979,7 @@ int pm8001_abort_task(struct sas_task *task)
 	u32 phy_id, port_id;
 	struct sas_task_slow slow_task;
 
-	if (unlikely(!task || !task->lldd_task || !task->dev))
+	if (!task->lldd_task || !task->dev)
 		return TMF_RESP_FUNC_FAILED;
 
 	dev = task->dev;
-- 
2.25.1