linux-kernel - [PATCH 1/9] drivers/scsi/qla2xxx: Drop unnecessary null test

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Date:	Tue, 3 Aug 2010 23:31:35 +0200 (CEST)
From:	Julia Lawall <julia@...u.dk>
To:	Andrew Vasquez <andrew.vasquez@...gic.com>,
	linux-driver@...gic.com,
	"J, ames E.J. Bottomley" <James.Bottomley@...e.de>,
	linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org
Subject: [PATCH 1/9] drivers/scsi/qla2xxx: Drop unnecessary null test

From: Julia Lawall <julia@...u.dk>

list_for_each_entry_safe binds its first argument to a non-null value, and
thus any null test on the value of that argument is superfluous.

The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
iterator I;
expression x,E;
@@

I(x,...) { <...
- (x != NULL) &&
  E
  ...> }
// </smpl>

Signed-off-by: Julia Lawall <julia@...u.dk>

---
 drivers/scsi/qla2xxx/qla_os.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
index ff2172d..2b0e6ef 100644
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -2348,7 +2348,7 @@ qla2x00_remove_one(struct pci_dev *pdev)
 	ha = base_vha->hw;
 
 	list_for_each_entry_safe(vha, temp, &ha->vp_list, list) {
-		if (vha && vha->fc_vport)
+		if (vha->fc_vport)
 			fc_vport_terminate(vha->fc_vport);
 	}
 
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