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34e49164 C |
1 | Send to: thomas@winischhofer.net, linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org |
2 | ||
3 | Subject: [PATCH 2/2]: drivers/video: remove unnecessary pci_dev_put | |
4 | ||
5 | --------------------------------------- | |
6 | ||
7 | From: Julia Lawall <julia@diku.dk> | |
8 | ||
9 | pci_get_class implicitly does a pci_dev_put on its second argument, so | |
10 | pci_dev_put is only needed if there is a break out of the loop. | |
11 | ||
12 | The semantic match detecting this problem is as follows: | |
13 | ||
14 | // <smpl> | |
15 | @@ | |
16 | expression dev; | |
17 | expression E; | |
18 | @@ | |
19 | ||
20 | * pci_dev_put(dev) | |
21 | ... when != dev = E | |
22 | ( | |
23 | * pci_get_device(...,dev) | |
24 | | | |
25 | * pci_get_device_reverse(...,dev) | |
26 | | | |
27 | * pci_get_subsys(...,dev) | |
28 | | | |
29 | * pci_get_class(...,dev) | |
30 | ) | |
31 | // </smpl> | |
32 | ||
33 | Signed-off-by: Julia Lawall <julia@diku.dk> | |
34 | --- | |
35 | ||
36 | diff -up a/drivers/video/sis/sis_main.c b/drivers/video/sis/sis_main.c | |
37 | --- a/drivers/video/sis/sis_main.c 2007-11-15 07:33:31.000000000 +0100 | |
38 | +++ b/drivers/video/sis/sis_main.c 2007-11-15 07:38:48.000000000 +0100 | |
39 | @@ -4620,9 +4620,9 @@ sisfb_find_host_bridge(struct sis_video_ | |
40 | ||
41 | while((pdev = pci_get_class(PCI_CLASS_BRIDGE_HOST, pdev))) { | |
42 | temp = pdev->vendor; | |
43 | - pci_dev_put(pdev); | |
44 | if(temp == pcivendor) { | |
45 | ret = 1; | |
46 | + pci_dev_put(pdev); | |
47 | break; | |
48 | } | |
49 | } |