lkml.org 
[lkml]   [2008]   [Jan]   [1]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[PATCH 1/2] drivers/media/radio: Use video_device_release rather than kfree
From: Julia Lawall <julia@diku.dk>

The file drivers/media/video/videodev.c defines both video_device_alloc and
video_device_release. These are essentially just kzmalloc and kfree,
respectively, but it seems better to use video_device_release, as done in
the other media files, rather than kfree, in case the implementation some
day changes.


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

// <smpl>
@@
type T,T1,T2;
identifier E;
statement S;
expression x1,x2,x3;
int ret;
@@

T E;
...
* E = video_device_alloc(...);
if (E == NULL) S
... when != video_device_release(...,(T1)E,...)
when != if (E != NULL) { ... video_device_release(...,(T1)E,...); ...}
when != x1 = (T1)E
when != E = x3;
when any
if (...) {
... when != video_device_release(...,(T2)E,...)
when != if (E != NULL) { ... video_device_release(...,(T2)E,...); ...}
when != x2 = (T2)E
(
* return;
|
* return ret;
)
}
// </smpl>

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

diff -u -p a/drivers/media/radio/radio-maestro.c b/drivers/media/radio/radio-maestro.c
--- a/drivers/media/radio/radio-maestro.c 2007-06-02 22:32:16.000000000 +0200
+++ b/drivers/media/radio/radio-maestro.c 2008-01-01 14:18:44.000000000 +0100
@@ -423,7 +423,7 @@ static int __devinit maestro_probe(struc
errunr:
video_unregister_device(maestro_radio_inst);
errfr1:
- kfree(maestro_radio_inst);
+ video_device_release(maestro_radio_inst);
errfr:
kfree(radio_unit);
err:

\
 
 \ /
  Last update: 2008-01-01 22:11    [W:0.044 / U:0.616 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site