diff options
| author | Hans Verkuil <hverkuil@xs4all.nl> | 2010-09-17 15:07:28 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2010-10-21 01:06:06 -0200 |
| commit | 8403472f19fea7e7cec7899e998f38b899e59604 (patch) | |
| tree | f23180ec9f6610bd3b416590beabc896798ec7fa /drivers/media/video/usbvision/usbvision-i2c.c | |
| parent | 1f2052539666bd8b43ed26c9b1c3687628c49ecc (diff) | |
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>
Diffstat (limited to 'drivers/media/video/usbvision/usbvision-i2c.c')
| -rw-r--r-- | drivers/media/video/usbvision/usbvision-i2c.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/media/video/usbvision/usbvision-i2c.c b/drivers/media/video/usbvision/usbvision-i2c.c index 42ba2878575..a5fd2aa3646 100644 --- a/drivers/media/video/usbvision/usbvision-i2c.c +++ b/drivers/media/video/usbvision/usbvision-i2c.c @@ -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); |