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OpenCloudOS-Kernel
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V4L/DVB: usbvision: remove BKL from usbvision 

Removed the BKL from usbvision.

There was an initialization bug as well where the i2c bus was registered twice.

Although when the BKL was present no oops was generated, I did run into
other i2c problems. Now that I protect against duplicate i2c registration
that bug is now gone as well.

But trying to disconnect the USB cable while someone is still using the device
still leads to a crash.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Hans Verkuil 2010-09-17 15:07:28 -03:00 committed by Mauro Carvalho Chehab
parent 1f20525396
commit 8403472f19
3 changed files with 13 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
drivers/media/video/usbvision/usbvision-i2c.c
View File

@ -211,6 +211,9 @@ int usbvision_i2c_register(struct usb_usbvision *usbvision)
0x42 >> 1, 0x40 >> 1, /* SAA7114, SAA7115 and SAA7118 */
I2C_CLIENT_END };
if (usbvision->registered_i2c)
return 0;
memcpy(&usbvision->i2c_adap, &i2c_adap_template,
sizeof(struct i2c_adapter));
@ -268,6 +271,8 @@ int usbvision_i2c_register(struct usb_usbvision *usbvision)
&usbvision->i2c_adap, "tuner",
"tuner", 0, v4l2_i2c_tuner_addrs(type));
if (sd == NULL)
return -ENODEV;
if (usbvision->tuner_type != -1) {
tun_setup.mode_mask = T_ANALOG_TV | T_RADIO;
tun_setup.type = usbvision->tuner_type;
@ -275,14 +280,18 @@ int usbvision_i2c_register(struct usb_usbvision *usbvision)
call_all(usbvision, tuner, s_type_addr, &tun_setup);
}
}
usbvision->registered_i2c = 1;
return 0;
}
int usbvision_i2c_unregister(struct usb_usbvision *usbvision)
{
if (!usbvision->registered_i2c)
return 0;
i2c_del_adapter(&(usbvision->i2c_adap));
usbvision->registered_i2c = 0;
PDEBUG(DBG_I2C,"i2c bus for %s unregistered", usbvision->i2c_adap.name);

8
drivers/media/video/usbvision/usbvision-video.c
View File

@ -357,7 +357,7 @@ static int usbvision_v4l2_open(struct file *file)
PDEBUG(DBG_IO, "open");
lock_kernel();
mutex_lock(&usbvision->lock);
usbvision_reset_powerOffTimer(usbvision);
if (usbvision->user)
@ -379,7 +379,6 @@ static int usbvision_v4l2_open(struct file *file)
/* If so far no errors then we shall start the camera */
if (!errCode) {
mutex_lock(&usbvision->lock);
if (usbvision->power == 0) {
usbvision_power_on(usbvision);
usbvision_i2c_register(usbvision);
@ -408,14 +407,13 @@ static int usbvision_v4l2_open(struct file *file)
usbvision->initialized = 0;
}
}
mutex_unlock(&usbvision->lock);
}
/* prepare queues */
usbvision_empty_framequeues(usbvision);
PDEBUG(DBG_IO, "success");
unlock_kernel();
mutex_unlock(&usbvision->lock);
return errCode;
}
@ -1645,8 +1643,8 @@ static int __devinit usbvision_probe(struct usb_interface *intf,
usbvision->usb_bandwidth = 0;
usbvision->user = 0;
usbvision->streaming = Stream_Off;
usbvision_register_video(usbvision);
usbvision_configure_video(usbvision);
usbvision_register_video(usbvision);
mutex_unlock(&usbvision->lock);
usbvision_create_sysfs(usbvision->vdev);

1
drivers/media/video/usbvision/usbvision.h
View File

@ -363,6 +363,7 @@ struct usb_usbvision {
/* i2c Declaration Section*/
struct i2c_adapter i2c_adap;
int registered_i2c;
struct urb *ctrlUrb;
unsigned char ctrlUrbBuffer[8];