diff options
| author | Marcel Siegert <mws@linuxtv.org> | 2007-02-26 00:38:10 +0100 |
|---|---|---|
| committer | Adrian Bunk <bunk@stusta.de> | 2007-02-26 00:38:10 +0100 |
| commit | 399aeb8633a59da4e89d4754f031385c3e34d4b4 (patch) | |
| tree | d91bc4dbd217fe3ced238c22d11856370e1e8aba | |
| parent | 9164edcb4e4a74b4e7d6e57c9d59e2d8fb5654bb (diff) | |
V4L/DVB: Dvbdev: fix illegal re-usage of fileoperations struct
Arjan van de Ven <arjan@infradead.org> reported an illegal re-usage of
the fileoperations struct if more than one dvb device (e.g. frontend) is
present.
This patch fixes this issue.
It allocates a new fileoperations struct each time a device is
registered and copies the default template fileops.
Signed-off-by: Marcel Siegert <mws@linuxtv.org>
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
| -rw-r--r-- | drivers/media/dvb/dvb-core/dvbdev.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/media/dvb/dvb-core/dvbdev.c b/drivers/media/dvb/dvb-core/dvbdev.c index 54f8b95717b0..cb622bbf655d 100644 --- a/drivers/media/dvb/dvb-core/dvbdev.c +++ b/drivers/media/dvb/dvb-core/dvbdev.c @@ -200,6 +200,8 @@ int dvb_register_device(struct dvb_adapter *adap, struct dvb_device **pdvbdev, const struct dvb_device *template, void *priv, int type) { struct dvb_device *dvbdev; + struct file_operations *dvbdevfops; + int id; if (mutex_lock_interruptible(&dvbdev_register_lock)) @@ -221,12 +223,22 @@ int dvb_register_device(struct dvb_adapter *adap, struct dvb_device **pdvbdev, mutex_unlock(&dvbdev_register_lock); + dvbdevfops = kzalloc(sizeof(struct file_operations), GFP_KERNEL); + + if (!dvbdevfops) { + kfree (dvbdev); + mutex_unlock(&dvbdev_register_lock); + return -ENOMEM; + } + memcpy(dvbdev, template, sizeof(struct dvb_device)); dvbdev->type = type; dvbdev->id = id; dvbdev->adapter = adap; dvbdev->priv = priv; + dvbdev->fops = dvbdevfops; + memcpy(dvbdev->fops, template->fops, sizeof(struct file_operations)); dvbdev->fops->owner = adap->module; list_add_tail (&dvbdev->list_head, &adap->device_list); @@ -259,6 +271,7 @@ void dvb_unregister_device(struct dvb_device *dvbdev) dvbdev->type, dvbdev->id))); list_del (&dvbdev->list_head); + kfree (dvbdev->fops); kfree (dvbdev); } EXPORT_SYMBOL(dvb_unregister_device); |