linux-kernel - [PATCH] drivers/misc: Move misplaced pci_dev

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Date:	Sat, 3 Nov 2007 16:16:21 +0100 (CET)
From:	Julia Lawall <julia@...u.dk>
To:	rubini@...vis.unipv.it
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH] drivers/misc: Move misplaced pci_dev_put's.

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

Move pci_dev_put outside the loops in which it occurs.  Within the loop,
pci_dev_put is done implicitly by pci_get_device.

The problem was detected using the following semantic patch, and corrected
by hand.

@@
expression dev;
expression E;
@@

- pci_dev_put(dev)
   ... when != dev = E
- pci_get_device(...,dev)


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

---

diff -up a/drivers/misc/ioc4.c b/drivers/misc/ioc4.c
--- a/drivers/misc/ioc4.c	2007-06-02 22:32:17.000000000 +0200
+++ b/drivers/misc/ioc4.c	2007-11-03 15:42:48.000000000 +0100
@@ -244,10 +244,11 @@ ioc4_variant(struct ioc4_driver_data *id
  		    idd->idd_pdev->bus->number == pdev->bus->number &&
  		    3 == PCI_SLOT(pdev->devfn))
  			found = 1;
-		pci_dev_put(pdev);
  	} while (pdev && !found);
-	if (NULL != pdev)
+	if (NULL != pdev) {
+	  	pci_dev_put(pdev);
  		return IOC4_VARIANT_IO9;
+	}

  	/* IO10: Look for a Vitesse VSC 7174 at the same bus and slot 3. */
  	pdev = NULL;
@@ -258,10 +259,11 @@ ioc4_variant(struct ioc4_driver_data *id
  		    idd->idd_pdev->bus->number == pdev->bus->number &&
  		    3 == PCI_SLOT(pdev->devfn))
  			found = 1;
-		pci_dev_put(pdev);
  	} while (pdev && !found);
-	if (NULL != pdev)
+	if (NULL != pdev) {
+		pci_dev_put(pdev);
  		return IOC4_VARIANT_IO10;
+	}

  	/* PCI-RT: No SCSI/SATA controller will be present */
  	return IOC4_VARIANT_PCI_RT;
-
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