UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

drivers/video/bfin-lq035q1-fb.c: introduce missing kfree 

Error handling code following a kmalloc should free the allocated data.

The semantic match that finds the problem is as follows:
(http://www.emn.fr/x-info/coccinelle/)

// <smpl>
@r exists@
local idexpression x;
statement S;
expression E;
identifier f,f1,l;
position p1,p2;
expression *ptr != NULL;
@@

x@p1 = \(kmalloc\|kzalloc\|kcalloc\)(...);
...
if (x == NULL) S
<... when != x
     when != if (...) { <+...x...+> }
(
x->f1 = E
|
 (x->f1 == NULL || ...)
|
 f(...,x->f1,...)
)
...>
(
 return \(0\|<+...x...+>\|ptr\);
|
 return@p2 ...;
)

@script:python@
p1 << r.p1;
p2 << r.p2;
@@

print "* file: %s kmalloc %s return %s" % (p1[0].file,p1[0].line,p2[0].line)
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Acked-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Julia Lawall 2011-04-01 14:23:47 +00:00 committed by Paul Mundt
parent b73a21fc66
commit a8c908d353
1 changed files with 3 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/video/bfin-lq035q1-fb.c
View File

@ -154,8 +154,10 @@ static int __devinit lq035q1_spidev_probe(struct spi_device *spi)
ret = lq035q1_control(spi, LQ035_SHUT_CTL, LQ035_ON);
ret |= lq035q1_control(spi, LQ035_DRIVER_OUTPUT_CTL, ctl->mode);
if (ret)
if (ret) {
kfree(ctl);
return ret;
}
spi_set_drvdata(spi, ctl);