From: Julia Lawall <[email protected]>
pci_get_class implicitly does a pci_dev_put on its second argument, so
pci_dev_put is only needed if there is a break out of the loop.
The semantic match detecting this problem is as follows:
// <smpl>
@@
expression dev;
expression E;
@@
* pci_dev_put(dev)
... when != dev = E
(
* pci_get_device(...,dev)
|
* pci_get_device_reverse(...,dev)
|
* pci_get_subsys(...,dev)
|
* pci_get_class(...,dev)
)
// </smpl>
Signed-off-by: Julia Lawall <[email protected]>
---
diff -up a/drivers/video/sis/sis_main.c b/drivers/video/sis/sis_main.c
--- a/drivers/video/sis/sis_main.c 2007-11-15 07:33:31.000000000 +0100
+++ b/drivers/video/sis/sis_main.c 2007-11-15 07:38:48.000000000 +0100
@@ -4620,9 +4620,9 @@ sisfb_find_host_bridge(struct sis_video_
while((pdev = pci_get_class(PCI_CLASS_BRIDGE_HOST, pdev))) {
temp = pdev->vendor;
- pci_dev_put(pdev);
if(temp == pcivendor) {
ret = 1;
+ pci_dev_put(pdev);
break;
}
}
-
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