From: Marcel Siegert Arjan van de Ven 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. (backported from commit b61901024776b25ce7b8edc31bb1757c7382a88e) Signed-off-by: Marcel Siegert Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Michael Krufky Signed-off-by: Greg Kroah-Hartman --- drivers/media/dvb/dvb-core/dvbdev.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) --- linux-2.6.20.1.orig/drivers/media/dvb/dvb-core/dvbdev.c +++ linux-2.6.20.1/drivers/media/dvb/dvb-core/dvbdev.c @@ -200,6 +200,8 @@ int dvb_register_device(struct dvb_adapt 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_adapt 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_de dvbdev->type, dvbdev->id))); list_del (&dvbdev->list_head); + kfree (dvbdev->fops); kfree (dvbdev); } EXPORT_SYMBOL(dvb_unregister_device); -- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/