linux-kernel - [PATCH 9/12] drivers/scsi/qla2xxx: Add missing unlock

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Date:	Mon, 29 Mar 2010 17:36:02 +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 9/12] drivers/scsi/qla2xxx: Add missing unlock

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

This code represents error handling code.  Add an unlock as done in the
normal exit path from the function.

A simplified version of the semantic patch that finds this problem is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
@r exists@
expression E1;
identifier f;
@@

f (...) { <+...
* spin_lock_irqsave (E1,...);
... when != E1
* return ...;
...+> }
// </smpl>

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

---
 drivers/scsi/qla2xxx/qla_attr.c     |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/drivers/scsi/qla2xxx/qla_attr.c b/drivers/scsi/qla2xxx/qla_attr.c
index 90d1e06..e8ace7a 100644
--- a/drivers/scsi/qla2xxx/qla_attr.c
+++ b/drivers/scsi/qla2xxx/qla_attr.c
@@ -2392,6 +2392,7 @@ done:
 		kfree(sp->fcport);
 	kfree(sp->ctx);
 	mempool_free(sp, ha->srb_mempool);
+	spin_unlock_irqrestore(&ha->hardware_lock, flags);
 	return 0;
 }
 
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