linux-kernel - [RESEND3 PATCH] libiscsi: avoid unnecessary multiple NULL assignments

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Message-Id: <20130225.232905.2064482459783060269.yamato@redhat.com>
Date:	Mon, 25 Feb 2013 23:29:05 +0900 (JST)
From:	Masatake YAMATO <yamato@...hat.com>
To:	linux-scsi@...r.kernel.org
Cc:	Mike Christie <michaelc@...wisc.edu>, linux-kernel@...r.kernel.org
Subject: [RESEND3 PATCH] libiscsi: avoid unnecessary multiple NULL
 assignments

In iscsi_free_task, NULL is assigned to task->sc twice: before and
after kfifo_in invocatoin. Allocating and freeing iscsi_task are guarded
with session->lock, so multiple NULL assignments cause no trouble. But
people reading the source code may be confused.

The second NULL assignment comes from commit:

    3e5c28ad0391389959ccae81c938c7533efb3490

It seems that the line after kfifo_in invocation was introduced
accidentally.

Signed-off-by: Masatake YAMATO <yamato@...hat.com>
Reviewed-by: Mike Christie <michaelc@...wisc.edu>
---
 drivers/scsi/libiscsi.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c
index 82c3fd4..7aacf3a 100644
--- a/drivers/scsi/libiscsi.c
+++ b/drivers/scsi/libiscsi.c
@@ -507,7 +507,6 @@ static void iscsi_free_task(struct iscsi_task *task)
 	kfifo_in(&session->cmdpool.queue, (void*)&task, sizeof(void*));
 
 	if (sc) {
-		task->sc = NULL;
 		/* SCSI eh reuses commands to verify us */
 		sc->SCp.ptr = NULL;
 		/*
-- 
1.7.11.7

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