lkml.org 
[lkml]   [2008]   [Nov]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[PATCH 2/2] drivers/pci/hotplug: Add missing pci_dev_get
From: Julia Lawall <julia@diku.dk>

pci_get_slot does a pci_dev_get, so pci_dev_put needs to be called in an
error case.

An alterative would be to move the test_and_set_bit before the call to
pci_get_slot.

The problem was fixed using the following semantic patch.
(http://www.emn.fr/x-info/coccinelle/)

// <smpl>
@@
local idexpression *n;
statement S1,S2;
expression E,E1;
expression *ptr != NULL;
type T,T1;
@@

(
if (!(n = pci_get_slot(...))) S1
n = pci_get_slot(...)
)
<... when != pci_dev_put(n)
when != if (...) { <+... pci_dev_put(n) ...+> }
when != true !n || ...
when != n = (T)E
when != E = n
if (!n || ...) S2
...>
(
return \(0\|<+...n...+>\|ptr\);
+ pci_dev_put(n);
return ...;
|
pci_dev_put(n);
|
n = (T1)E1
|
E1 = n
)
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
---
drivers/pci/hotplug/fakephp.c | 1 +
1 file changed, 1 insertion(+)
diff -u -p a/drivers/pci/hotplug/fakephp.c b/drivers/pci/hotplug/fakephp.c
--- a/drivers/pci/hotplug/fakephp.c
+++ b/drivers/pci/hotplug/fakephp.c
@@ -324,6 +324,7 @@ static int disable_slot(struct hotplug_s

if (test_and_set_bit(0, &dslot->removed)) {
dbg("Slot already scheduled for removal\n");
+ pci_dev_put(dev);
return -ENODEV;
}


\
 
 \ /
  Last update: 2008-11-23 09:11    [from the cache]
©2003-2011 Jasper Spaans