diff options
| author | Marcel Siegert <mws@linuxtv.org> | 2007-02-27 13:09:49 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2007-03-02 21:09:53 -0800 |
| commit | 811a76ef3a25ae2e1531d118c8cd154c2a6757cb (patch) | |
| tree | f3c9e12731b879d1b54ad35253fff0c80e80a237 | |
| parent | cc36d4a3308f1965f9409985ecbe64a2685d81fa (diff) | |
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: Mauro Carvalho Chehab <mchehab@infradead.org>
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.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 40774feb8953..af35f3058d0f 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)) @@ -219,12 +221,22 @@ int dvb_register_device(struct dvb_adapter *adap, struct dvb_device **pdvbdev, return -ENOMEM; } + 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); @@ -252,6 +264,7 @@ 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); |