openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

DVB (2401): USB hot unplug Oops fix. 

- USB hot unplug Oops fix.

Signed-off-by: Deti Fliegl <deti@fliegl.de>
Signed-off-by: Johannes Stezenbach <js@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@brturbo.com.br>
This commit is contained in:
Deti Fliegl 2006-01-09 15:25:23 -02:00 committed by Mauro Carvalho Chehab
parent 6a5bdd322e
commit e4acba3c01
1 changed files with 49 additions and 26 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

75
drivers/media/dvb/cinergyT2/cinergyT2.c
View File

@ -131,6 +131,8 @@ struct cinergyt2 {
wait_queue_head_t poll_wq;
int pending_fe_events;
int disconnect_pending;
atomic_t inuse;
void *streambuf;
dma_addr_t streambuf_dmahandle;
@ -343,7 +345,7 @@ static int cinergyt2_start_feed(struct dvb_demux_feed *dvbdmxfeed)
struct dvb_demux *demux = dvbdmxfeed->demux;
struct cinergyt2 *cinergyt2 = demux->priv;
if (down_interruptible(&cinergyt2->sem))
if (cinergyt2->disconnect_pending || down_interruptible(&cinergyt2->sem))
return -ERESTARTSYS;
if (cinergyt2->streaming == 0)
@ -359,7 +361,7 @@ static int cinergyt2_stop_feed(struct dvb_demux_feed *dvbdmxfeed)
struct dvb_demux *demux = dvbdmxfeed->demux;
struct cinergyt2 *cinergyt2 = demux->priv;
if (down_interruptible(&cinergyt2->sem))
if (cinergyt2->disconnect_pending || down_interruptible(&cinergyt2->sem))
return -ERESTARTSYS;
if (--cinergyt2->streaming == 0)
@ -479,23 +481,37 @@ static int cinergyt2_open (struct inode *inode, struct file *file)
{
struct dvb_device *dvbdev = file->private_data;
struct cinergyt2 *cinergyt2 = dvbdev->priv;
int err;
int err = -ERESTARTSYS;
if ((err = dvb_generic_open(inode, file)))
return err;
if (down_interruptible(&cinergyt2->sem))
if (cinergyt2->disconnect_pending || down_interruptible(&cinergyt2->sem))
return -ERESTARTSYS;
if ((err = dvb_generic_open(inode, file))) {
up(&cinergyt2->sem);
return err;
}
if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
cinergyt2_sleep(cinergyt2, 0);
schedule_delayed_work(&cinergyt2->query_work, HZ/2);
}
atomic_inc(&cinergyt2->inuse);
up(&cinergyt2->sem);
return 0;
}
static void cinergyt2_unregister(struct cinergyt2 *cinergyt2)
{
dvb_unregister_device(cinergyt2->fedev);
dvb_unregister_adapter(&cinergyt2->adapter);
cinergyt2_free_stream_urbs(cinergyt2);
kfree(cinergyt2);
}
static int cinergyt2_release (struct inode *inode, struct file *file)
{
struct dvb_device *dvbdev = file->private_data;
@ -504,7 +520,7 @@ static int cinergyt2_release (struct inode *inode, struct file *file)
if (down_interruptible(&cinergyt2->sem))
return -ERESTARTSYS;
if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
if (!cinergyt2->disconnect_pending && (file->f_flags & O_ACCMODE) != O_RDONLY) {
cancel_delayed_work(&cinergyt2->query_work);
flush_scheduled_work();
cinergyt2_sleep(cinergyt2, 1);
@ -512,6 +528,11 @@ static int cinergyt2_release (struct inode *inode, struct file *file)
up(&cinergyt2->sem);
if (atomic_dec_and_test(&cinergyt2->inuse) && cinergyt2->disconnect_pending) {
warn("delayed unregister in release");
cinergyt2_unregister(cinergyt2);
}
return dvb_generic_release(inode, file);
}
@ -519,7 +540,14 @@ static unsigned int cinergyt2_poll (struct file *file, struct poll_table_struct
{
struct dvb_device *dvbdev = file->private_data;
struct cinergyt2 *cinergyt2 = dvbdev->priv;
if (cinergyt2->disconnect_pending || down_interruptible(&cinergyt2->sem))
return -ERESTARTSYS;
poll_wait(file, &cinergyt2->poll_wq, wait);
up(&cinergyt2->sem);
return (POLLIN | POLLRDNORM | POLLPRI);
}
@ -585,7 +613,7 @@ static int cinergyt2_ioctl (struct inode *inode, struct file *file,
if (copy_from_user(&p, (void __user*) arg, sizeof(p)))
return -EFAULT;
if (down_interruptible(&cinergyt2->sem))
if (cinergyt2->disconnect_pending || down_interruptible(&cinergyt2->sem))
return -ERESTARTSYS;
param->cmd = CINERGYT2_EP1_SET_TUNER_PARAMETERS;
@ -696,7 +724,7 @@ static void cinergyt2_query_rc (void *data)
struct cinergyt2_rc_event rc_events[12];
int n, len, i;
if (down_interruptible(&cinergyt2->sem))
if (cinergyt2->disconnect_pending || down_interruptible(&cinergyt2->sem))
return;
len = cinergyt2_command(cinergyt2, buf, sizeof(buf),
@ -791,7 +819,6 @@ static int cinergyt2_register_rc(struct cinergyt2 *cinergyt2)
static void cinergyt2_unregister_rc(struct cinergyt2 *cinergyt2)
{
cancel_delayed_work(&cinergyt2->rc_query_work);
flush_scheduled_work();
input_unregister_device(cinergyt2->rc_input_dev);
}
@ -822,7 +849,7 @@ static void cinergyt2_query (void *data)
uint8_t lock_bits;
uint32_t unc;
if (down_interruptible(&cinergyt2->sem))
if (cinergyt2->disconnect_pending || down_interruptible(&cinergyt2->sem))
return;
unc = s->uncorrected_block_count;
@ -922,28 +949,25 @@ static void cinergyt2_disconnect (struct usb_interface *intf)
{
struct cinergyt2 *cinergyt2 = usb_get_intfdata (intf);
if (down_interruptible(&cinergyt2->sem))
return;
flush_scheduled_work();
cinergyt2_unregister_rc(cinergyt2);
cinergyt2->demux.dmx.close(&cinergyt2->demux.dmx);
dvb_net_release(&cinergyt2->dvbnet);
dvb_dmxdev_release(&cinergyt2->dmxdev);
dvb_dmx_release(&cinergyt2->demux);
dvb_unregister_device(cinergyt2->fedev);
dvb_unregister_adapter(&cinergyt2->adapter);
cancel_delayed_work(&cinergyt2->query_work);
wake_up_interruptible(&cinergyt2->poll_wq);
cinergyt2_free_stream_urbs(cinergyt2);
up(&cinergyt2->sem);
kfree(cinergyt2);
cinergyt2->demux.dmx.close(&cinergyt2->demux.dmx);
cinergyt2->disconnect_pending = 1;
if (!atomic_read(&cinergyt2->inuse))
cinergyt2_unregister(cinergyt2);
}
static int cinergyt2_suspend (struct usb_interface *intf, pm_message_t state)
{
struct cinergyt2 *cinergyt2 = usb_get_intfdata (intf);
if (down_interruptible(&cinergyt2->sem))
if (cinergyt2->disconnect_pending || down_interruptible(&cinergyt2->sem))
return -ERESTARTSYS;
if (state.event > PM_EVENT_ON) {
@ -966,7 +990,7 @@ static int cinergyt2_resume (struct usb_interface *intf)
struct cinergyt2 *cinergyt2 = usb_get_intfdata (intf);
struct dvbt_set_parameters_msg *param = &cinergyt2->param;
if (down_interruptible(&cinergyt2->sem))
if (cinergyt2->disconnect_pending || down_interruptible(&cinergyt2->sem))
return -ERESTARTSYS;
if (!cinergyt2->sleeping) {
@ -1019,4 +1043,3 @@ module_exit (cinergyt2_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Holger Waechtler, Daniel Mack");