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authorJulia Lawall <julia@diku.dk>2010-06-01 16:35:15 +0200
committerJiri Kosina <jkosina@suse.cz>2010-06-02 11:08:42 +0200
commitdfe5c7b7e710d8ed885068b0fcfa6f66ab685592 (patch)
treeb0d9a1529d8d1be97419f11b1071c67927dff69b /drivers/hid/hid-roccat.c
parent33ccbc320fc38094128c68b2ee0b305884965bd4 (diff)
HID: roccat: 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> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid/hid-roccat.c')
-rw-r--r--drivers/hid/hid-roccat.c9
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/hid/hid-roccat.c b/drivers/hid/hid-roccat.c
index e05d48edb66f..f6e80c7ca61e 100644
--- a/drivers/hid/hid-roccat.c
+++ b/drivers/hid/hid-roccat.c
@@ -168,7 +168,7 @@ static int roccat_open(struct inode *inode, struct file *file)
printk(KERN_EMERG "roccat device with minor %d doesn't exist\n",
minor);
error = -ENODEV;
- goto exit_unlock;
+ goto exit_err;
}
if (!device->open++) {
@@ -178,7 +178,7 @@ static int roccat_open(struct inode *inode, struct file *file)
PM_HINT_FULLON);
if (error < 0) {
--device->open;
- goto exit_unlock;
+ goto exit_err;
}
}
error = device->hid->ll_driver->open(device->hid);
@@ -187,7 +187,7 @@ static int roccat_open(struct inode *inode, struct file *file)
device->hid->ll_driver->power(device->hid,
PM_HINT_NORMAL);
--device->open;
- goto exit_unlock;
+ goto exit_err;
}
}
@@ -202,6 +202,9 @@ exit_unlock:
mutex_unlock(&device->readers_lock);
mutex_unlock(&devices_lock);
return error;
+exit_err:
+ kfree(reader);
+ goto exit_unlock;
}
static int roccat_release(struct inode *inode, struct file *file)

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