linux-kernel - [PATCH 16/17] drivers/staging/vme/bridges: Add missing unlocks

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Message-ID: <Pine.LNX.4.64.1005261758540.23743@ask.diku.dk>
Date:	Wed, 26 May 2010 17:59:11 +0200 (CEST)
From:	Julia Lawall <julia@...u.dk>
To:	Greg Kroah-Hartman <gregkh@...e.de>, devel@...verdev.osuosl.org,
	linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: [PATCH 16/17] drivers/staging/vme/bridges: Add missing unlocks

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

Add a spin_unlock and mutex_unlock missing on the error path.

The semantic match that finds this problem is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
expression E1;
@@

* spin_lock(E1,...);
  <+... when != E1
  if (...) {
    ... when != E1
*   return ...;
  }
  ...+>
* spin_unlock(E1,...);
// </smpl>

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

---
 drivers/staging/vme/bridges/vme_ca91cx42.c |    8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/vme/bridges/vme_ca91cx42.c b/drivers/staging/vme/bridges/vme_ca91cx42.c
index 0c82eb4..f38f7b7 100644
--- a/drivers/staging/vme/bridges/vme_ca91cx42.c
+++ b/drivers/staging/vme/bridges/vme_ca91cx42.c
@@ -900,7 +900,8 @@ unsigned int ca91cx42_master_rmw(struct vme_master_resource *image,
 	/* Address must be 4-byte aligned */
 	if (pci_addr & 0x3) {
 		dev_err(dev, "RMW Address not 4-byte aligned\n");
-		return -EINVAL;
+		result = -EINVAL;
+		goto out;
 	}
 
 	/* Ensure RMW Disabled whilst configuring */
@@ -921,6 +922,7 @@ unsigned int ca91cx42_master_rmw(struct vme_master_resource *image,
 	/* Disable RMW */
 	iowrite32(0, bridge->base + SCYC_CTL);
 
+out:
 	spin_unlock(&(image->lock));
 
 	mutex_unlock(&(bridge->vme_rmw));
--
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